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Forum: Icom Mods
 Topic: IC-290 Mod - Enhance SSB audio quality
IC-290 Mod - Enhance SSB audio quality [message #157] Sat, 19 January 2008 20:00
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
IC-290 Mod - Enhance SSB audio quality

French language below

On strong signals (59+) the SSB demodulated audio is affected by distortion. On weak signals, the noise coming from the SSB demodulator can be improved for a better S/N ratio.

To modify your IC290, you need the schematic diagram and layout plan of the device.

  • Remove the bottom cover (speaker side) to gain access to the main PCB.

  • Remove all connectors carefully (use a screw driver as lever). This PCB is sensitive to ESD.

  • Close to IC3, change capacitor C55 from 1 nF to 10nF to move the low pass cut-off to 5kHz. Use a good ceramic capacitor (X7R 1206 SMD, or a small MKT like Wima).

  • Change capacitor C53 from 0.047-??F to 22nF to limit audio low frequency to 200 Hz.

  • Replace the capacitor C87 1-??F by 0.47-??F tantalum or MKT. This capacitor acts only in transmitting low frequency if your voice is too deep. But, take care of the quality of this capacitor. Don't use a bad quality ceramic capacitor.

Modify the region of Q29 close to IC11. The audio is fed to Q29 as audio amplifier.

  • In parallel to R187 (collector load), add a 10nF X7R SMD capacitor. This will add a final low pass cut-off frequency at 4.5kHz to remove all high frequency noise from audio.

  • Cut the emitter track of Q29 to add a 150 Ohms resistor in series with the (C157 R188) couple. This will add an emitter feedback to reduce distortion in SSB and FM. Note : collector voltage of Q29 is near 5 V.

  • Change capacitor C157 from 4.7-??F to 22-??F 6V minimum, a tantalum capacitor will be better. This will improve low frequency and audio will be smooth and less aggressive (not like Asian sound!).

  • You could improve power supply rejection by changing C155 from 10-??F to 47-??F/10V.

I did those modifications to improve the quality of my transceiver used in short-wave band with a transverter. The sound quality is less aggressive.

Testing your transceiver:

To compare improvements, I checked the full frequency response of the receiver:

  • Connect a noise source to the receiver antenna socket, or your antenna pointed to sun (to get a wide band noise).

  • Connect the sound card of your PC to R153 via 10-??F capacitor.

  • Load up a DSP software SPECTRAN that makes FFT on audio signal, average the display with a factor close to 16. You will see the audio response of your transceiver. (SPECTRAN: http://www.qsl.net/padan/spectran.html)

Transceiver frequency response before modification:
too much emphasis on high frequencies and low frequency attenuation.

Transceiver frequency response after modification:
better frequency balance and broader bandpass.

Have good QSOs !

73's from F5RCT

Augmentez la qualit+?? audio en SSB de votre IC-290

En forts signaux (59+), la d+??modulation en SSB est affect+??e par de la distorsion. En signaux faibles, le bruit provenant du d+??modulateur peut +??tre am+??lior+?? pour augmenter le rapport signal sur bruit.

Pour modifier votre IC-290 vous avez besoin du sch+??ma et du plan d'implantation de l'appareil.

  • D+??poser le couvercle du fond (cot+?? haut-parleur) pour acc+??der au circuit imprim+?? principal (MAIN PCB).

  • D+??brancher d+??licatement les connecteurs (sans tirer sur les fils), en se servant d'un tournevis pour faire levier. Le circuit est sensible aux d+??charges +??lectrostatiques.

  • Pr+??s de iC3, remplacer le condensateur C55 de 1nF +?? 10nF pour d+??placer la fr+??quence de coupure +?? 5 kHz. Utiliser un bon condensateur c+??ramique (type X7R 1206 CMS, ou un petit MKT type "Wima").

  • Remplacer le condensateur C53 de 0.047-??F +?? 22nF pour limiter le fr+??quences basses +?? 200 Hz.

  • Remplacer le condensateur C87 de 1-??F +?? 0.47-??F tantale, MKT ou +??lectrolytique aluminium. Ce condensateur agit en +??mission sur la clart+?? de la voix et les fr+??quences basse du domaine audio (int+??ressant pour les OM qui ont une voix tr+??s grave). Mais attention +?? la qualit+?? de ce condensateur car l'imp+??dance s+??rie doit rester faible, ne pas mettre de capacit+?? c+??ramique miniature.

Modifier la r+??gion de Q29 pr+??s de iC11. Le signal audio passe par Q29 en tant qu'amplificateur audio.

  • En parall+??le +?? R187 (charge collecteur), ajouter condensateur 10nF type X7R 1206 CMS, ou un petit MKT type "Wima". Ceci ajoute un filtre passe bas +?? 4.5 kHz pour att+??nuer toutes des hautes fr+??quences du spectre audio, y compris en mode FM.

  • Couper la piste tout pr+??s de l'+??metteur de Q29 pour ajouter une r+??sistance de 150 Ohms en s+??rie avec le couple (C157//R188). Cette r+??sistance ajoutera une contre r+??action d'+??metteur pour r+??duire la distorsion en SSB et en FM. Note : la tension du collecteur de Q29 est proche de 5V.

  • Remplacer le condensateur C157 de 4.7-??F +?? 22-??F (6V min), un tantale c'est parfait ! Cela am+??liore les basses fr+??quences et l'audio est plus doux (et moins agressif comme le son asiatique !).

  • On peut augmenter la r+??jection d'alimentation en rempla+??ant C155 de 10-??F +?? 47-??F/10V. J'avais fait ces modifications pour augmenter la qualit+?? de mon transceiver que j'utilise en ondes -courtes avec un transverter. La qualit+?? est beaucoup moins agressive.

Testez votre transceiver:

Pour comparer les am+??lioration, j'ai v+??rifi+?? la r+??ponse compl+??te en fr+??quence du r+??cepteur:

  • Connecter une source de bruit +?? l'entr+??e du r+??cepteur, ou votre antenne (avec pr+??ampli) point+??e vers le soleil pour avoir une source de bruit large bande.

  • Connecter la carte son de votre PC sur la sortie haut-parleur (jack-externe)

  • Charger un logiciel de traitement num+??rique pour faire une FFT du signal audio. J'ai utilis+?? Spectran avec un facteur average de 16. http://www.qsl.net/padan/spectran.html

R+??ponse en fr+??quence de mon IC290 avant modification:
accentuation des aigu+??s et att+??nuation des graves.

R+??ponse en fr+??quence de mon IC290 apr+??s modification:
meilleur +??quilibre des fr+??quences et bande passante +??largie.

Bons QSOs !

73's de F5RCT

 Topic: ic 7000 Mars Mod (UK Model) Needed
ic 7000 Mars Mod (UK Model) Needed [message #142] Tue, 25 September 2007 07:32
2e0mcg  is currently offline 2e0mcg
Messages: 1
Registered: September 2007
Location: cheshire uk
Junior Member

hi im after the mars/cap mod for the icom ic 7000 (uk model) all i can find is us mod,no definative instructions stating the uk mod,any help would be appreciated,regards john. allojohny@yahoo.co.uk

[Updated on: Sat, 26 December 2009 09:40] by Moderator

 Topic: ICOM IC-2820 Extended band, cross-band procedure
ICOM IC-2820 Extended band, cross-band procedure [message #128] Sun, 06 May 2007 13:07
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
I have tested on my IC2820 the diodes guide for extended bands. Please, open the down side and look at the two rows of diodes on the right side, placed vertically (foto 1).



From up to down (foto 2):



	First diode is not present
	Remove second diode:	144-150 Mhz		430-450 Mhz    auto-repeater USA
+	Remove fourth diode:	144-148 Mhz		430-450 Mhz
+	Remove fifth diode:	144-148 Mhz		400-470 Mhz
+	Remove sixth diode:	137-174 Mhz		400-470 Mhz
+	Seventh diode apparently it doesn't change anything ……
	Applying the eighth:	cross-band is activated 
To activate cross-band procedure, press and hold two main band knobs and press ; the radio will beep and the key symbol on the left side of the display will flash; now the radio is now active in the cross-band mode.

To cancel the cross-band repeat function, please press .

Good test, Luca IK0YYY, Rome, Italy.

[Updated on: Sun, 06 May 2007 13:11]

 Topic: IC-7000 Alternate method to enable TV mode
IC-7000 Alternate method to enable TV mode [message #106] Tue, 30 January 2007 23:58
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
The IC-7000 has an additional set of solder pads next to TV diode D2154.

The solder pads are in the shape of half circles connected by a thin printed trace. The thin pc trace can be easily cut with an exacto type knife.

If present this method eliminates unsoldering the small surface mount diode, furthermore, the TV function can be easily disabled by bridging the half circles with solder.

[Updated on: Tue, 30 January 2007 23:58]

 Topic: IC-2200H MOD for extended RX/TX range
IC-2200H MOD for extended RX/TX range [message #94] Tue, 09 January 2007 23:31
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
RX receive circuitry can be modified to receive from 118 MHz to 174 MHz. This requires the removal of a surface mount diode D 11 from the Logic Board. It is the only non SMT-Diode of the Logic Board.

TX transmit circuitry can be modified to transmit from 136 MHz to 174 MHz. This requires the removal of a surface mount diode D 13 from the Logic Board. D 13 is near by D 11.

73, 55 de Wolf, DL5DKW

Thanks to hs9dih for this schematic.
 Topic: Icom IC-7000 TVRO & MARS Mods by Steve, N5AC (US version)
Icom IC-7000 TVRO & MARS Mods by Steve, N5AC (US version) [message #93] Mon, 25 December 2006 03:23
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
Thanks to Steve, N5AC for his research and success in determining the mods below!

Disclaimer: No liability is assumed for the accuracy of this material or the consequences of its use. Use of this information is intended to be eduhoneyional and is at your own risk. Modifihoneyions to your radio may void its warrantee and may be illegal in your country. It is your responsibility to check and follow the laws of your country in regards to this information. In NO case should the TV function of this unit be watched by the driver while a vehicle is in motion. The pictures below are from the USA #5 version of the IC-7000. See additional notes after the modifihoneyion information.
TVRO:
1. Remove CPU/DSP unit by unscrewing three silver screws holding it down (the silver box on the top of the radio with copper taped sides) and pull up.

2. Lohoneye four shift registers and bank of diodes - shift registers are 4094's. There are two next to each other and then a couple more. We'll call the two stacked the "left" ones

3. The "middle" shift register if looking from the front of the radio is the target.

4. Lohoneye bank of SMT diodes (silver with "K" on top on one side) in front of the target shift register. They are in two columns, "left" and "right"

5. Unsolder one side of the second diode from the front on the right and lift up one side (or remove, slip to the side, whatever turns you on)

MARS:

OK - here's an out-of-band mod that does TX from 0-54, 118-173, 400-470.

1. Remove CPU/DSP unit by unscrewing three silver screws holding it down (the silver box on the top of the radio with copper taped sides) and pull up.

2. Lohoneye four shift registers and bank of diodes - shift registers are 4094's. There are two next to each other and then a couple more. We'll call the two stacked the "left" ones.

3. The "left" shift register if looking from the front of the radio is the target.

4. Lohoneye bank of SMT diodes (silver with "K" on top on one side) in front of the target shift register. They are in two columns, "left" and "right".

5. Unsolder one side of the second diode from the front on the left and lift up one side (or remove, slip to the side, whatever turns you on).



NOTE: The Automatic Repeater Shift on 2 meters and 440 is not affected by this mod! The “Band Edge Beep”, on the other hand, does not function.
NOTES:

* The modifihoneyion information for MARS is the official modifihoneyion information from ICOM USA, so the modifihoneyion may not be appropriate for versions other than the USA #5 unit.
* IC-7000 owners performing the mod do so at their own risk.
* The diodes should be unsoldered carefully, not broken or crushed.
* If decision is made to reverse the modifihoneyions, remember these are diodes, and must be replaced in the proper direction
* No responsibility is assumed for the accuracy of the mod info, or for the consequences of its use.
* Transmitting on unauthorized frequencies is in breach of radio regulations.

USING THE TVRO FUNCTION:

After modifihoneyion, TV channels 2-13 are available (USA) in NTSC format

* Push and hold [AF(set)] for one second to turn TV mode ON and OFF
* Rotate [M-ch] (inner control) to select the desired TV Channel
* The Band keys to the far right of the radio also change TV channels
* There will be a popup showing the TV channel (This can be turned off in set mode)
* The preamp and attenuator functions are functional in TV mode and each channel can store the preamp/attenuator on/off functions independently
* There will be a popup showing the ATT/P.AMP status (This can be turned off in set mode)
* Rotate [AF] for a suitable volume level.

[Updated on: Sat, 26 December 2009 09:48]

 Topic: ICOM R-7000 Receiver Heat Sink Cooler
ICOM R-7000 Receiver Heat Sink Cooler [message #74] Sat, 09 September 2006 20:32
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
The new ICOM R7000 25-2000 MHz receiver is a super radio, but the power supply tends to run hot. The two biggest heat generators are the pbasstransistor and bridge rectifier module. The stock heat sink, a flat piece of metal bolted to the inside of the cabinet rear, is inadequate. After 30 minutes of use, the back panel gets very hot, and the entire cabinet warms.

I added a small heat sink to the outside of my radio, using the screw that holds the bridge rectifer to the stock heat sink. An application of heat conductive grease between the added sink and the cabinet helps the heat transfer process. Now the rest of the cabinet gets barely warm to the touch.

Bob Parnass, AJ9S

[Updated on: Sat, 09 September 2006 20:37]

 Topic: ICOM I290 Modification
ICOM I290 Modification [message #61] Sun, 25 June 2006 16:33
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
OBJECTIVE:
---------
The objective of the modification is to implement a delay before scanning restarts when, in SCAN-STOP mode on BUSY frequency, the received signal disappears.

The modification will then allow a frequency to be free for a while before scanning resumes. With this modification, it will be given a chance to a signal to come back within a few seconds before the scanning restarts. Now multiple QSOs or poor signals won't be truncated any more because of a too much impatient scanning !

WHAT TO DO:
----------

Very simple. On the SENSOR UNIT, just solder a jumper between: - the unused contact of switch S3 (the one corresponding to the TIMER OFF position of the circuit commanding the SEL pin of IC1) - and the EMPTY signal of connector J3 (this is the extreme pin nearest S2 on the SENSOR unit)

ATTENTION, there are some errors on the electrical scheme that I possess reference A-0488 :

* The S3 switch is represented in position TIMER OFF and not ON as written. You have to reverse labels OFF and ON.

* The signals BUSY and EMPTY on connected are reversed. EMPTY (SQ1) is on the extreme left pin of S3 and BUSY is on 2nd pin of this connector S3. In fact, the switch S2 is drawn in the BUSY position and not EMPTY.

HOW IT WORKS :
-------------

The TIMER starts when pin SEL of IC1 goes to 0V. When the TIMER is running, the scanning is halted. The scanning also stops when the BUSY signal is low level (0V) on pin SQL of IC1. Let us suppose that a signal is received. Then BUSY goes to 0V and scanning halts. At the same time the EMPTY signal , which is the inverse of BUSY, goes to 5V and the TIMER remains off.

If the received signal disappears BUSY goes high and EMPTY low, then the TIMER is enabled and starts running. It also maintains the scanning in halt mode.

If, at the end of the TIMER delay, no signal has come back then the scanning restarts. If a signal comes back before the end of the TIMER delay then the BUSY signal returns to 0V and maintains the scanning in halt mode. In the meantime the TIMER will run until the end of its delay without any action on the process.

The TIMER delay is chosen with the R32 potentiometer on the SENSOR UNIT. The minimum value is about 4 to 5 seconds which is perfect for this working mode.

CONCLUSION:
----------
Small modification .... great effect !
============================================================ ==============
Note: Proceed at your own risk.
 Topic: Icom 735 TX Mod
Icom 735 TX Mod [message #56] Fri, 28 April 2006 23:13
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
The mod for gen/cov tx for the IC-735 involves removing D33 and D34 from the main board. You'll have to lift the PA module up to do this, locate the diodes and simply snip one end of each. Very simple, but it's amazing just how many screws need removing in the process!

Good luck,
Simon Browne G0GWA.
 Topic: Icom IC-2100H Extended Transmit Mod Sheet
Icom IC-2100H Extended Transmit Mod Sheet [message #55] Fri, 28 April 2006 23:11
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
Icom IC-2100H Extended Transmit Mod Sheet

For the first time anywhere on the web, the Icom IC-2100H extended frequency transmit modification and mod instruction sheet.

The socessor to the very popular IC-2000 unit, the IC-2100H has been around for a few months now and is selling for about $200 at most hamfests. The unit uncludes PL encode/decode, and 55 watts out at high power. But up until now the modification insturctions have been unavailable!

Brought to you by:

Spectracom Communications, for all your commerical radio needs call 732-989-1091 or e-mail to Spectracom98@webtv.net

W3EAX, Amateur Radio bassociation at the U of Maryland

KB3CVD, UMBC Amateur Radio Club

And amateur stations KC2AEI and W2SJW.

Please give us credit when copying these instructions!

STEP 1: HOLD DOWN THE SECOND AND THIRD FRONT FUNCTION BUTTONS WHILE TURNING THE RADIO ON. NOW TURN IT BACK OFF.

STEP 2: CAREFULLY REMOVE THE LARGE TUNING KNOB AND REMOVE THE TWO HEX SCREWS THAT HOLD THE FACEPLATE ON. PULL THE FACEPLATE STRAIGHT OF THE BODY WITHOUT TILTING IT (YOU RUN THE RISK OF BENDING THE PIN CONNECTORS BEHIND THE FACEPLATE).

STEP 3: TURN THE FACEPLATE OVER AND LOCATE THE MAIN IC CHIP, SET AT A 45-DEGREE ANGLE. JUST TO THE LOWER LEFT AND RIGHT OF THE IC, YOU WILL SEE THE MAIN PIN CONNECTORS. UNDER THE LOWER RIGHT CORNER OF THE LEFT PIN CONNECTOR, YOU SHOULD SEE A MARKING ON THE PC BOARD LABELED AS "D16". JUST BELOW THIS SHOULD BE THE MATCHING DIODE, CLOSE TO THE BOTTOM EDGE OF THE BOARD. REMOVE THIS DIODE AND CAREFULLY RE-bassEMBLE THE RADIO(WATCH THOSE FACEPLATE PINS!!

THE RADIO WILL NOW TX 136-174 MHZ. AS FAR AS I KNOW, YOU DO NOT HAVE TO RESET THE MEMORY TO MAKE THE MOD WORK( I HAVE 70 OUT-OF-BAND MEMORIES STORED, ALL OF THEM WORKED WITHOUT RESETTING THE UNIT!!!!!

September 5, 1998 - KC2AEI
Forum: Rasberry Pi
 Topic: Raspberry Pi Solar Heater Controller / Off Grid
Raspberry Pi Solar Heater Controller / Off Grid [message #3113] Thu, 25 June 2015 00:20
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
This project took quite some time to finish. The box design was built around a piece of solar glass that was meant for solar panels at one point. The glass is tempered and when breaks, will shatter into a million little pieces. (I broke only 2 so far, but enough to not want to break them again!)


Solar Can Box Heater Header to Hold Cans

Solar Can Heater Wooden Box

Yes, these are Coors Light beer cans.. and NO, I did not drink them. I did buy them for .05 a piece though from someone very nice enough to collect them for me! If this isn't REAL recycling.. Wink
Solar Beer Can Heater

Solar Can Box Heater

Solar Can Box Heater

4 Inch Holes were drilled into the house. One on the top for hot air out, and one for intake on the bottom. The cold air from the floor will be sucked in and heated through the tubes. Once the box reaches a certain temperature, the fan will turn on and force the hot air into the room. (Yes, the back of the house needs to be painted.. The ivy grows like mad, and when you pull it off, it takes the paint with it.)
Solar Can Heater on House

Solar Can Heater 12V Fan

The Raspberry Pi and the relay board and fan controller all were put on the right side of this box. Inside this box is a solar charge controller and breakers. The battery is a 12V marine.
Solar Battery Charger Off Grid Heater

The brain of this whole system is powered by the Raspberry Pi. The system is using the PiFace for the relays and a Buck converter to convert the voltage from 12V to 5V. There is also a simple motor controller with a "manual" potentiometer for adjusting the fan speed. (The next enhancement to this will be an electronically controller fan speed module.. I was working on this but never finished.)
Solar Battery Charger Off Grid Heater

The Raspberry Pi is setup as a database/web server and it will take the temperature measurements of the inside and outside of the box and will insert them into a database. This way, at any given time (within 10 minute increments), we can see the status. The data can also be compared throughout the years. The Python scripts monitor the date/time and the temperatures to determine if the fan needs to be working or not. So far the system has been running for more than two years without any problems and OFF THE GRID! The average temperature stays at about 70 degrees in the room with no other heating needed. This can probably be tweaked a bit, but during negative degree weather outside, 70 degrees isn't bad!
If the fan isn't running, the box can reach temperatures of up to 160 degrees in the middle of winter!
Some future additions might be to add alarm indexes and a camera to take snapshots of specific events. These events can help to facilitate changes to efficiency.

[Updated on: Thu, 25 June 2015 01:07]

 Topic: GoodFET42 Firmware Programming with Raspberry Pi
GoodFET42 Firmware Programming with Raspberry Pi [message #3049] Thu, 27 November 2014 02:59
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
I ordered my boards from Travis and they came in within a few days! Thanks Travis! The boards were very well made and worth every penny. Mounting the SMD chips wasn't too bad either. The first row I soldered on the main M430F2618 chip ended up with a couple of crossed pins because I moved the soldering iron in the wrong direction and it bent a pin.. (I don't have brain surgery hands anymore.. Wink These pins are generic IO pins and they weren't being used, so I just left them. I don't think anyone will notice except for me and even though it bothers me, it works fine and it isn't worth the time to try to separate them.

As for the programming of the firmware, this was a little tricky. At first I was using Windows with Cygwin and I had nothing but problems with the make install.

I wrote this post to help others who may have run into similar problems with their GoodFET programming.

I had my Raspberry Pi handy and decided to use this to do the firmware programming. Once hooked up, python-serial needed to be installed. (Python was already installed prior to this, if it isn't installed, it should be..)

#Make sure the GoodFET device is the correct device. You can find this by looking in /dev/ . You can do an ls on the /dev/ directory with it unplugged, then plugged in. Whatever shows up when plugged in should be what is used (ex: ttyUSB0)

export GOODFET=/dev/ttyUSB0
export board=goodfet42

sudo apt-get install binutils-msp430 gcc-msp430 msp430-libc mspdebug
sudo apt-get python-serial
mkdir ~/svn
cd ~/svn
git clone https://github.com/travisgoodspeed/goodfet goodfet
#This next line's lohoneyion has changed from the original documentation and the make is in this dir.
cd goodfet/firmware
#This next line shows another change. The .bsl file is in a different spot now also (under client dir).
../client/goodfet.bsl --speed=38400 -e -p goodfet.hex


Output should look something similar to this:

MSP430 Bootstrap Loader Version: 1.39-goodfet-8
Invoking BSL...
Transmit default password ...
Current bootstrap loader version: 2.13 (Device ID: f26f)
Checking for info flash... Saved!
Mass Erase...
Transmit default password ...
Invoking BSL...
Transmit default password ...
Current bootstrap loader version: 2.13 (Device ID: f26f)
Changing baudrate to 38400 ...
Program ...
25720 bytes programmed.

#Run a self-test (this takes a minute or more)
../client/goodfet.monitor test
Performing monitor self-test.
Self-test complete.



[Updated on: Thu, 27 November 2014 03:18]

 Topic: Raspberry Pi 1Wire DS18B20 Thermometer
Raspberry Pi 1Wire DS18B20 Thermometer [message #3021] Sat, 02 November 2013 22:20
kc2nda  is currently offline kc2nda
Messages: 31
Registered: December 2004
Location: New Paltz
Member
I will be controlling a 12V Fan with a Raspberry Pi and a DS18B20 waterproof thermometer. The DS18B20 uses 3 wires even though they call it a 1wire system. The one wire is actually what makes the communication the other two is power and ground. I purchased the DS18B20 thermometer from ebay and they were pretty cheap. The DS18B20 thermometer was in a waterproof shell. The only problem I had which took me about 2 nights worth of playing around with the coding, the Raspberry Pi, and the 1wire DS18B20, was the wiring diagram that was on the Chinese seller's website of the DS18B20 stated that the yellow wire was ground and the green wire was the data line. This was wrong. Usually green is the common wire and I was a little skeptical at first but figured it was from China so anything is possible.

Of course, I didn't have any other 1wire devices to test on the Raspberry Pi. I couldn't test to make sure the Raspberry Pi was not functioning or the 1Wire DS18B20 was not functioning. Finally I took a chance and reversed the ground and data lines and it worked like a charm.

The 12V fan will also be controlled by the Raspberry Pi. A 555 timer will be used in conjunction with a digital potentiometer to adjust the fan speed.

Project pictures and circuit diagrams will follow.
Forum: Brag Forum
 Topic: Why install a computer in the car? (Carputer)
Why install a computer in the car? (Carputer) [message #3112] Tue, 16 June 2015 01:31
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
I am a programmer, electronics engineer, and overall interested in Ham Radio. So add all those together and your mind starts to play fantasy land. I custom built the computer to fulfill several applications. I wanted something with 4 serial ports, something that will auto-shutdown and power up with ignition, of course be touch screen compatible, and have Bluetooth and internet capable. The serial ports are to control a couple of Ham Radios that I will be stashing around in the vehicle. Also, one port is for a GPS antenna that will be available for navigation. I have an application that I am writing specifically for Hams so this is also for experimenting.

The motherboard is a Jetway with a serial add-on board and a Bluetooth/Wireless combo card. The hard drive is a 256GB solid state drive and the case is a M350 Mini-ITX with a PicoPSU that controls the power.

In the dash behind the monitor is a Directed Electronics HD Radio with a mini 30W amp. The HD Radio is controlled by a MJS USB Interface.

I have a mini, wireless Visiontek keyboard in case I don't want to use the touchscreen...

The OS is Windows 8.1 (I had originally had Ubuntu and traded it out because of the software availability), and I am currently using RideRunner for the HD Radio interface. Since it has Windows 8.1, you can do anything like view pictures, play movies (of course not while driving, but will still work if someone in the back seat wanted to watch), MP3s, etc..

What is the reason for a carputer? For one big reason, I can drive around and the computer will connect to any open networks and give me internet in the car. If wanted, I could put a cellular modem in it to have constant internet is needed. It is capable of giving me the options to re-program any of my Ham Radios without having to take them out of the car or drag a laptop into the car. I have one Motorola that has the plug directly installed in the back of the radio so I can re-program it at anytime. I will also be hooking up a odb2 monitor.

I am also writing an applihoneyion that will sync any MP3s from my server to the carputer when internet is available. This way, I setup my music and playlists from anywhere and I receive them for the ride!

The options are limitless. As long as there is a need, the computer can do it. If you don't like a specific application, you can always change it for another. That is the nice thing about the carputer over a standard radio.

Price? The HD Radio cost $50 on ebay. The Amp cost about $30 new from Amazon. The computer itself probably ran about $500. I would say that if you don't want a hassle and want something super stable, then buying an all in one DVD/NAV system is the way to go. If you like adventure and are good with electronics and computers, then a carputer is the way to go hands down!

As for the knowledge needed to make a carputer, anyone can do it.. It is fun to learn, but there are many things that you have to understand. For example, the power supply needed to be hooked up just right and jumpers needed to be set to get things to work. The cables needed to be routed from under the seat to the console through the floor. All serial cables and usb cables, audio and VGA cables needed to be run through the floor mats also.. There is a lot of planning, like how long the cables need to be, how to connect everything, how the audio will work, what adapters might be needed; ie. what other electronics will be needed to make everything work. So it is complex, and could take time.. But fun and exciting when things work!

At the moment, I am going to be adding a Raspberry Pi to the mix. I will be adding a KVM switch and will be able to switch between the two computers!

[Updated on: Tue, 16 June 2015 01:40]

 Topic: Honda Element Carputer Screen Installation
Honda Element Carputer Screen Installation [message #3111] Thu, 11 June 2015 01:01
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
I was tired of my stock radio and since everything is driven by computers, it was time to install the carputer! The screen was purchased off of ebay. It is fully touch and the computer at the moment is stuffed under the passenger seat.

Honda Element Carputer Touch Screen Installation

There is a small 30W amp and a HD Radio stuffed behind the screen.

Honda Element Touch Screen Installation

[Updated on: Sat, 13 June 2015 12:27]

 Topic: Honda Element Ham Radio Installation
Honda Element Ham Radio Installation [message #3104] Thu, 04 June 2015 00:10
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
There isn't much on the web about installing a Ham Radio in a Honda Element. I figured it might be nice to use the forum to show different installations in different vehicles. Here are a few photos and comments to show what I have done.

Honda Element Ham Radio Antenna Installation
Hole Was Drilled and the wire was passed through to the driver's side column and down under the plastic flooring and to the center console where the radio is stored. The only thing with this installation is that you can actually hear a little whistle as you pick up speed.
Honda Element Ham Radio Antenna Installation
A hole was drilled inside the center column to connect the bracket to the column.

Honda Element Ham Radio Antenna Installation
There is a bracket that was used on the ICOM IC-2720. The bracket has a hole in it which makes it perfect to install in this lohoneyion.
The finished product. I will take another picture with it installed. But it works great. The main unit is stuffed under the center console and a external speaker is used for the audio.

Honda Element Ham Radio Antenna Installation


Honda Element Ham Radio Installation

[Updated on: Sat, 13 June 2015 12:24]

Forum: Cellular
 Topic: UTStarcom CPE1134 Circuitry - Hack
UTStarcom CPE1134 Circuitry - Hack [message #3108] Sat, 06 June 2015 02:29
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
How may of us wanted to know what was inside a cell phone? For the amount of money paid for this cellphone: ($10) with no contract. Only a US passport and the green piece of paper! You can't go wrong with an electronic tinkerer wanting something to play around with.

USStarcom Circuit Board

This phone was packing an ARM processor (meant specifically for cell phones) with several other chips. The other chip must be a memory module for the processor. Nothing fancy there.
ARM MT6223DA

The next chips are the SKY77542 which is a transmit and receive front-end module (FEM) with an integrated Power Amplifier Control for dual-band cellular GSM900 and DCS1800, and the AD6548 which is a complete GSM.GPRS Transceiver. These do the actual cellular communihoneyions.
SKY77542

The next chip is the AR1010. This chip is a complete FM Radio Receiver. This can be used to receive FM radio stations between 76 - 108MHz. This was the best part of the phone =)
AR1010 FM Receiver

[Updated on: Sat, 06 June 2015 03:03]

 Topic: How Cell Phones Work
How Cell Phones Work [message #60] Wed, 14 June 2006 23:44
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
Cell Phone Codes
All cell phones have special codes associated with them. These codes are used to identify the phone, the phone's owner and the service provider.
Let's say you have a cell phone, you turn it on and someone tries to call you. Here is what happens to the call:

When you first power up the phone, it listens for an SID (see sidebar) on the control channel. The control channel is a special frequency that the phone and base station use to talk to one another about things like call set-up and channel changing. If the phone cannot find any control channels to listen to, it knows it is out of range and displays a "no service" message.

When it receives the SID, the phone compares it to the SID programmed into the phone. If the SIDs match, the phone knows that the cell it is communicating with is part of its home system.

Along with the SID, the phone also transmits a registration request, and the MTSO keeps track of your phone's location in a database -- this way, the MTSO knows which cell you are in when it wants to ring your phone.

The MTSO gets the call, and it tries to find you. It looks in its database to see which cell you are in.

The MTSO picks a frequency pair that your phone will use in that cell to take the call.

The MTSO communicates with your phone over the control channel to tell it which frequencies to use, and once your phone and the tower switch on those frequencies, the call is connected. Now, you are talking by two-way radio to a friend.

As you move toward the edge of your cell, your cell's base station notes that your signal strength is diminishing. Meanwhile, the base station in the cell you are moving toward (which is listening and measuring signal strength on all frequencies, not just its own one-seventh) sees your phone's signal strength increasing. The two base stations coordinate with each other through the MTSO, and at some point, your phone gets a signal on a control channel telling it to change frequencies. This hand off switches your phone to the new cell.

Let's say you're on the phone and you move from one cell to another -- but the cell you move into is covered by another service provider, not yours. Instead of dropping the call, it'll actually be handed off to the other service provider.

If the SID on the control channel does not match the SID programmed into your phone, then the phone knows it is roaming. The MTSO of the cell that you are roaming in contacts the MTSO of your home system, which then checks its database to confirm that the SID of the phone you are using is valid. Your home system verifies your phone to the local MTSO, which then tracks your phone as you move through its cells. And the amazing thing is that all of this happens within seconds.

The less amazing thing is that you may be charged insane rates for your roaming call. On most phones, the word "roam" will come up on your phone's screen when you leave your provider's coverage area and enter another's. If not, you'd better study your coverage maps carefully -- more than one person has been unpleasantly surprised by the cost of roaming. Check your service contract carefully to find out how much you're paying when you roam.

Note that if you want to roam internationally, you'll need a phone that will work both at home and abroad. Different countries use different cellular access technologies.

Let's take a good look inside a digital cell phone.

Inside a Cell Phone
On a "complexity per cubic inch" scale, cell phones are some of the most intricate devices people use on a daily basis. Modern digital cell phones can process millions of calculations per second in order to compress and decompress the voice stream.

Let's talk about what some of the individual chips do. The analog-to-digital and digital-to-analog conversion chips translate the outgoing audio signal from analog to digital and the incoming signal from digital back to analog.

The microprocessor handles all of the housekeeping chores for the keyboard and display, deals with command and control signaling with the base station and also coordinates the rest of the functions on the board.

The ROM and Flash memory chips provide storage for the phone's operating system and customizable features, such as the phone directory. The radio frequency (RF) and power section handles power management and recharging, and also deals with the hundreds of FM channels. Finally, the RF amplifiers handle signals traveling to and from the antenna.

The display has grown considerably in size as the number of features in cell phones have increased. Most current phones offer built-in phone directories, calculators and games. And many of the phones incorporate some type of PDA or Web browser.

Some phones store certain information, such as the SID and MIN codes, in internal Flash memory, while others use external cards that are similar to SmartMedia cards.

Cell phones have such tiny speakers and microphones that it is incredible how well most of them reproduce sound. The speaker is about the size of a dime and the microphone is no larger than the watch battery beside it. Speaking of the watch battery, this is used by the cell phone's internal clock chip.

What is amazing is that all of that functionality -- which only 30 years ago would have filled an entire floor of an office building -- now fits into a package that sits comfortably in the palm of your hand!

In 1983, the analog cell-phone standard called AMPS (Advanced Mobile Phone System) was approved by the FCC and first used in Chicago. AMPS uses a range of frequencies between 824 megahertz (MHz) and 894 MHz for analog cell phones. In order to encourage competition and keep prices low, the U. S. government required the presence of two carriers in every market, known as A and B carriers. One of the carriers was normally the local-exchange carrier (LEC), a fancy way of saying the local phone company.

Carriers A and B are each assigned 832 frequencies: 790 for voice and 42 for data. A pair of frequencies (one for transmit and one for receive) is used to create one channel. The frequencies used in analog voice channels are typically 30 kHz wide -- 30 kHz was chosen as the standard size because it gives you voice quality comparable to a wired telephone.

The transmit and receive frequencies of each voice channel are separated by 45 MHz to keep them from interfering with each other. Each carrier has 395 voice channels, as well as 21 data channels to use for housekeeping activities like registration and paging.

A version of AMPS known as Narrowband Advanced Mobile Phone Service (NAMPS) incorporates some digital technology to allow the system to carry about three times as many calls as the original version. Even though it uses digital technology, it is still considered analog. AMPS and NAMPS only operate in the 800-MHz band and do not offer many of the features common in digital cellular service, such as e-mail and Web browsing.

Forum: Programming Radios
 Topic: Motorola XPR 4550 XPR 5550 Programming Cable Pinout
Motorola XPR 4550 XPR 5550 Programming Cable Pinout [message #3103] Fri, 22 May 2015 09:46
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
Motorola XPR 4550 XPR 5550 Programming Cable Pinout

This needs a simple USB cable with no other parts involved besides the PMLN5072 connector. Cut the one side of the USB cable that is not needed. Wire up as follows:

White Data - Pin 2
Green Data + Pin 1
Red Vbus Pin 3
Black ground Pin 4

Looking at the back of the radio the connector facing you the pins are as follows:

Upper left side of the connector is pin 2
Lower left side of the connector is pin 1
Pin 4 is next to pin 2
Pin 3 is next to pin 1

Some people have mentioned that the green and white wires where swapped, so you might want to check your USB connector before making the assumption that the white and green wires are what they really say they are. Some cables may be swapped depending on who made them. Some cheap cables might not follow the standard color scheme.
I was told by a Motorola rep that the front microphone connector will not program everything on the radio and is not recommended because it is some proprietary system Motorola has. However the back will program everything.

Motorola XPR Programming Cable
The left cable is the one just made for under $10. The one on the right was purchased by another ham for more than $30. These cables sell on ebay for as much as $60. It gives a reason to cut off USB cables from old mice and keyboards and keep them around for cables like these.

[Updated on: Sun, 31 May 2015 23:46]

 Topic: Motorola mcs2000
Motorola mcs2000 [message #2819] Sun, 21 April 2013 03:54
motorolaxtl  is currently offline motorolaxtl
Messages: 1
Registered: April 2013
Location: Australia
Junior Member
Hi everybody I new to this site I recently bought a Motorola mcs2000 and I took it to a Motorola dealer in Australia and they told me that they used ver 2.00.00 software to read the radio Iam wondering if anybody has that software. Thank you in advance.
 Topic: Kenwood Software Programming Reference
Kenwood Software Programming Reference [message #155] Sat, 12 January 2008 17:12
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Messages: 192
Registered: December 2004
Senior Member
SOFTWARE PROGRAMS THESE RADIOS

SOFTWARERADIOS
KPG-5DTK-930 TK-931
KPG-6D TK-705 TK-805
KPG-7DTK-630 TK-730 TK-830
KPG-11DTK-230 TK-330
KPG-15DKDS-10
KPG-16DTK-430 TK-431
KPG-21D TKB-720 TKR-720 TKR-820
KPG-23D TK-250 TK-350
KPG-25DM2 TK-840 TK-940 TK-941
KPG-26D TK-353
KPG-27D TK-260 TK-270 TK-360 TK-370
KPG-29D TK-760 TK-762 TK-860 TK-862
KPG-31D TK-255
KPG-35D TK-480 TK-481
KPG-38D TK-290 TK-390
KPG-41D TK-715
KPG-44D TK-690 TK-790 TK-890
KPG-47D TKR-830
KPG-48DTK-2100(K)(K2) TK-3100(K)(K2) TK-3101(K2)
KPG-49D TK-280 TK-380 TK-780 TK-880
KPG-56D"G" SERIES PORTABLES & MOBILES (260GK, 360GK, 270GK, 370GK, 760(H)GK, 860(H)GK, TK-762(H)GK, TK862(H)GK
KPG-79D TK-7150 TK-8150
KPG-81D TK-2160 TK-3160

RADIO PROGRAMMING CABLES PROGRAMMING CABLE PROGRAMS THESE RADIOS

CABLERADIOS
KPG-4 TK-705 TK-760 TK-762 TK-860 TK-862 TK-840 TK-930 TK-630 TK-730 TK-830
KPG-14 KDS-10 KCT-24S KVT-10 VH-C1
KPG-22 TK-250 TK-350 TK-260 TK-360 TK-353 TK-270 TK-370 TK-2100 TK-3100 TK-2160 TK-430 TK-431 TK-255 TK-715 TK-3160
KPG-36TK-280 TK-380 TK-290 TK-2140 TK-480 TK-481 TK-390 TK-3140
KPG-43 TK-690 TK-790 TK-890
KPG-46 or KPG-4 TK-780 TK-880 TK-980 TK-981 TKR-830 TK-7150 TK-8150
KPT-50 TKB-720 TKR-720 TKR-820

[Updated on: Wed, 23 May 2012 01:17]

 Topic: Motorola RSS Reference List
Motorola RSS Reference List [message #133] Mon, 21 May 2007 01:35
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
There is no guarantee of accuracy of this list...

Part # Media Operating
System
Product(s) Manual(s) RSS Ver License? Release Date RIB
Needed?
RIB-to-radio cable
HVN9054D 3.5 3.1, 95, 98 1225 6880904Z93 R03.2 RPX4719G 08/23/00 Yes 3080070N01
RVN4106B 3.5   "-10" PRODUCT CONFIG TOOL 6804005C75 R04.00.00   08/25/93    
HVN9001D 3.5 3.1, 95, 98 1225LS 6880906Z25 R2.0 RPX4719G 12/15/00 Yes HLN9359A
RVN4057C 3.5 DOS 32x8 Codeplug 6881125E50 R01.01.01 RPX4719G 08/09/91 No 3080385B23 &
5880385B30
MDVN4964E 3.5   9100 System Upgrade N/A R02.01.00   01/03/95    
RVN4126E 3.5   9100-386 & 9100-386T Devices 6804018C30 R01.60.00   01/31/97    
MDVN4963C 3.5   9100-386 System Upgrade N/A R02.00.00   01/03/95    
MDVN4965C 3.5   9100-WS/T Configuration N/A N/A   01/03/95    
RVN4085C 3.5   Advanced Securenent CIU 6880310B58 R02.00.00 RPX4719G 01/11/94 No 0180358A25
RVN4185A CD 95, 98, ME, NT, 2000 Astro 25 Mobile   R01.00.00 RPX4719G 11/15/01 No NKN6545A
RVN4186A CD 95, 98, ME, NT, 2000 Astro 25 Mobile/Portable   R01.00.00 RPX4719G 11/15/01   RKN4105A /
RVN4106A
RVN4181A CD 95, 98, ME, NT, 2000 Astro 25 Portable   R01.00.00 RPX4719G 11/15/01   RKN4105A /
RVN4106A
RVN4053M 3.5   ASTRO Digital Interface 6802924C15 R7.01.11 RPX4719G 04/12/00 No 3080385B23
RVN4183B CD 95, 98, ME, NT, 2000 Astro Mobile   R01.01.00 RPX4719G 10/22/01 Yes RKN4047A
RVN4100U 3.5 DOS Astro Mobile/Portable N/A R09.01.00 NLA - SUBS TO RVN4184    
RVN4184B CD 95, 98, ME, NT, 2000 Astro Mobile/Portable Combination   R01.01.00 RPX4719G 10/22/01 Yes RKN4046A (Port)
RKN4047A (Mob)
RVN4182B CD 95, 98, ME, NT, 2000 Astro Portable   R01.01.00 RPX4719G 10/22/01 Yes RKN4046A
RVN4154G 3.5   ASTROTAC 3000 Comparator 6881098E15 R03.07.00 RPX4719G 10/20/99   3080385B23
RVN5003D 3.5   ASTROTAC Comparators 6881087E80 R50.21.00 RPX4719G 06/19/96 No 3080399E31 Adapt.
5880385B34
RVN4131C 3.5   BLINKERS.EXE INSTR. SHEET VER.1.02 6880309G87 04/19/96    
RVN4083A 3.5   BSC II 6880310B51 VR01.00 6880309G87 07/24/90 No FKN5836A
MDLN1058A 3.5 DOS C DEVELOPMENT APPL 6802705X01 R03.00.00   08/26/92    
NTN1024C 3.5 DOS C DEVL'MT.RD-LAP APPL 6802705X01 R01.00.00   08/26/92    
RVN4171B 3.5   C200   R01.01.00 RPX4719G 12/04/00    
HVN9025H CD 95,95, 98, ME, NT, 2000 CDM PRO Series 6881088C46 R06.01.00 RLN4809A 11/14/00   AARKN4083
AARKN4081 Ribless
RVN4029K 3.5   CENTRACOM SERIES II 6881121E49 R09.05.02 RPX4719G 11/15/96 No VARIOUS
SEE MANUAL
RVN4112E 3.5   COMMANDPLUS 6880309E42   RPX4719G   No  
RVN4149C 3.5   COMTEGRA 6881096E75 R04.00.00 RPX4719G 02/11/99 Yes 3082056X02
RVN4079G 3.5 DOS DESKTRAC CONVENTIONAL 6880310B53 MAXTRAC
R5.30.00
RPX4719G 05/09/95 Yes 3080070N01
RVN4093F 3.5 DOS DESKTRAC TRUNKED 6802982G55
6880310B61
R03.04.00 RPX4719G 12/13/1995 Yes 3080070N01
RVN4091C 3.5   DGT 9000 DESKSET 6880310B59 R01.00.11 RPX4719G 06/04/96 Yes 0180358A22
RVN4135A 3.5 DOS R100 (HVN9177) M100/M200,M110,M400 6880900Z22   RPX4719G 12/13/1995 Yes 0180358A52
HVN9025H CD 95,95, 98, ME, NT, 2000 EX500/600 6881088C46 R06.01.00 RLN4809A 11/14/00 Yes JMKN4123
RVN4107B 3.5 DOS FORMSGEN 9100-11 6881063C60 R03.06.00   12/13/1995    
RVN4146C 3.5   FORTE Wireless CommPad 6802945C40 R02.02.09 RPX4719G 05/08/98    
RVN4114A 3.5   GLOBAL POSITIONING SYS. 6880310B77 R01.00.00 RPX4719G 12/14/1995 No RKN4021A
HVN8177F 3.5   GM / GR300 / GR500 / GR400 / M10 / 12 / 130 6880902Z36
6880902Z64
6880903Z28
6880903Z67
R05.00.00 RPX4719G 12/13/1995 Yes 3080070N01
RVN4159A 3.5   GP 60 SERIES 6881086C08 R04.00.00 RPX4719G 12/27/96 Yes PMLN4074A
RVN4152C 3.5 DOS GP350 AVS 6880904Z32 R1.20 RPX4719G 01/23/98    
RVN4152C 3.5 DOS GP350 AVS 6880904Z32 R08.02.00 RPX4719G 12/30/1997    
RVN4150H 3.5 DOS GTX 6802948C70 R04.00.01 RPX4719G 10/13/00 Yes HKN9857(Portable)
3080070N01(Mobile)
RVN4047A 3.5 DOS HT 10 6881061C95 R01.00.06 RPX4719G 12/14/1995 Yes RTK4208B
RVN4021C 3.5 DOS HT 50 6881056C20 R02.00.00 RPX4719G 12/13/1995 Yes RTK4208B
RVN4005H 3.5 DOS HT600 (not HT600E) 6881045C55 R03.01.01 RPX4719G 04/03/01 Yes RTK4205C
RVN4031C 3.5 DOS HT800 6881058C65 R04.05.00 RPX4719G 12/13/1995 Yes RTK4205C
HVN9025K CD 95, 98, ME, NT, 2000 HT CDM/MTX/ER SERIES   CPS R06.02.03
PASSPORT R03.00.04
RLN4809A 7/17/2002 Yes AARKN4083
AARKN4081 Ribless
AARKN4075 Ribless non-USA
RKN4074
RVN4098H 3.5 DOS HT1000 / JT1000 / VISAR CONV'L 6881073C55 R03.03.00 RPX4719G 05/01/98 Yes RKN4035B(HT1000)
3080371E46(JT, VISAR CONV'L)
RVN4151B 3.5 DOS HT1000 AVS 6881084C35 R1.0 RPX4719G 08/30/97    
HVN9025H CD 95,95, 98, ME, NT, 2000 HT750/HT1250 6881088C46 R06.01.00 RLN4809A 11/14/00 Yes RKN4074A
HVN9085B 3.5   i20R   R01.02.00 6880309G87 12/26/00 No HLN9359
PROG. STAND
HVN9084B 3.5   i750 6880904Z45 R01.00.08 6880309G87 11/12/1996 Yes HLN-9102A
RVN4174N CD 95, 98, ME, NT, 2000 iDEN SUPER AGENT   R01.13.00 RPX4719G 4/19/02    
RVN4130D 3.5   INFOTAC MESSNG'R EDITOR 6804018C75
6804018C60
  R01.02.04 02/15/96    
HVN6053D CD 95,95, 98, ME, NT, 2000 KARISMA (CT SERIES) N.A R02.01.03 RLN4995A 11/08/00 Yes AAPMKN4004
RVN4156N 3.5 DOS LCS/LTS 2000 6802946C20 R02.00.10 RPX4719G 8/24/2001 Yes HKN9857(Portable)
3080070N01(Mobile)
RVN4087A 3.5   LORAN C LOC. RECV'R. 6880103W13 R01.00.00 6880309G87 12/14/1995 No RKN4021A
RVN4135A 3.5 DOS M100/M200 (HVN9173) 6880900Z20   RPX4719G 09/22/94 Yes 3080070N01
RVN4135A 3.5 DOS M110 (HVN9646)     RPX4719G 09/22/94 Yes 3080070N01
RVN4135A 3.5 DOS M400 (HVN9774) 6880901Z68   RPX4719G 09/22/94 Yes 3080070N01
RVN4135A 3.5 DOS M100/M200, M110, M400, R100 includes HVN9173,9177,9646,9774 6880900Z20   RPX4719G 12/13/1995 Yes 3080070N01
RVN4023G 3.5 DOS MARATRAC 6880102W24 R05.00.00 RPX4719G 07/02/98 Yes 3080070N01
RVN4019K 3.5 DOS MAXTRAC CONVENTIONAL 6880900Z03 R07.02.00 RPX4719G 01/05/98 Yes 3080070N01
RVN4139C 3.5 DOS MAXTRAC LS 6881078C79 R03.00.00 RPX4719G 01/23/98 Yes 3080070N01
RVN4043S 3.5 DOS MAXTRAC TRK'D. 6880102W46 R05.07.03 RPX4719G 4/6/2000 Yes 3080070N01
RVN4178A CD   MC SERIES, MC2000/2500   R01.00.00 NONE 5/15/2001   DDN6124A (DB25)
DDN6367A (DB9)
VVN4190B 3.5   MCP GENERIC 6802903A48 R01.00.10 RPX4719G 02/06/96    
RVN4027B 3.5   MCR 100 6881125E60 R01.10.00 6880309G87 12/14/1995    
RVN4177G CD 95,95, 98, ME, NT, 2000 COMBINATION MCS/MTS   R01.05.14 RPX4719G 08/24/01    
RVN4177K
combination of RVN4175 AND RVN4176 containing RVN4175, RVN4113, RVN4176, RVN4097, important notice sheet, letter
2-CD
2-3.5
95, 98, ME, NT, 2000, DOS MCS / MTS 6881081C15
6881074C50
R01.08.00 RPX4719G 06/18/02    
RVN4175K contains: RVN4113 (DOS) important notice sheet, letter 1-CD 1-3.5 95, 98, ME, NT, 2000, DOS MCS 2000 6881081C15 R01.08.00 RPX4719G 6/18/2002   Rib to MIC connector RKN4062B
RVN4113K 3.5 DOS MCS2000 6881081C15 R05.05.00 NLA - SUBS TO RVN4175 Yes RKN4062(for PROG/CLONING)
RKN4063(for FLASH/TEST PROG)
RVN4011B 3.5 DOS MCX 1000 6802902A30 R02.02.00 RPX4719G 12/13/95 Yes 3000056M01
RVN4063A 3.5 DOS MCX 1000 MARINE 682990A02 R01.03.00 RPX4719G 12/14/1995 Yes 3000056M01
RVN4117C 3.5   MDC/RDLAP DEVICES 6804110L45 R03.04.00   12/29/1995    
RVN4312A 3.5   MICOM 2 6802942C80 V2.0 RPX4719G 05/16/97 No FLN2423
RVN4105A 3.5   MOBILE PROG. TOOL 6804006C40 R03.00.00   12/14/1995    
RVN4119C 3.5   MOBITEX DEVICES 6804016C65 R01.04.04   12/15/1995    
RVN4037A 3.5 DOS MOSTAR CONVENTIONAL 6880900Z57 - NLA -   Yes 3080367B90
RVN4059C 3.5 DOS MOSTAR/TRAXAR TRK'D. 6881125E51 R01.01.01 RPX4719G 12/13/1995 No 3080367B90 / DUPLEX ADAPTER 0180359A29
RVN4128A 3.5   MPT1327-1200 SERIES 6802058U46
6802058U99
R02.02.00 RPX4719G 12/14/1995 Yes SEE MANUAL
RVN4025A 3.5   MSF 5000/PURC/ANALOG 6881121E08 V01.00.00 RPX4719G 12/13/1995 Yes 0180355A30
RVN4077G 3.5   MSF5000/10000 FIELD PROG DIGITAL 6881125E68 R05.21.00 RPX4719G 12/13/1995 Yes 0180355A30
RVN4017K 3.5 DOS MT 1000 6881050C20 R03.02.00 RPX4719G 5/18/2001 Yes RTK4205C
RVN4148M 3.5   MTR 2000 6881096E15 R03.02.06 RPX4719G 02/20/01 Yes 3082056X02
RVN4140C 3.5   MTRI 2000 6880309F68 R01.02.00 RPX4719G 02/17/99 No  
RVN4176G CD 95,95, 98, ME, NT, 2000 MTS WINDOWS   R01.05.14 RPX4719G 08/24/01    
RVN4176K contains RVN4097 (DOS) important notice sheet, letter 1-CD 1-3.5 95, 98, ME, NT, 2000, DOS MTS2000, MT2000*, MTX8000, MTX9000 *programmed by DOS which isincluded in the RVN4176 6881074C50 R01.08.00 RPX4719G 6/18/2002    
RVN4097S 3.5 DOS MTSX/MT/MTS/MTX 6881074C50 R06.05.00 NLA - SUBS TO RVN4176 Yes RKN4035B
RVN4131C 3.5   MTVA CODE PLUG FIX INSTR SHEET   6880309G87 04/19/96    
RVN4131C 3.5   MTVA CODE PLUG FIX INSTR SHEET VER.1.02 6880309G87 4/9/1996    
RVN4142A 3.5   MTVA DOCTOR 6880309F67 R05.10.00 RPX4719G 12/14/1996 Yes 3080070N01
RVN4131C 3.5   MTVA3.EXE INSTR. SHEET VER.3.00 6880309G87 04/19/96    
RVN4013K 3.5 DOS MTX 800 & 800S 6881054C10 R05.00.00 RPX4719G 01/05/98 Yes RTK4205C
RVN4065H 3.5 DOS MTX 810 6881065C25 R03.00.00 RPX4719G 01/05/98 Yes RTK4205C
RVN4033J 3.5 DOS MTX 900 6881068C85 R04.00.00 RPX4719G 01/05/98 Yes RTK4205C
RVN4055H 3.5 DOS MTX 900S 6881065C55 R04.00.00 RPX4719G 01/05/98 Yes RTK4205C
RVN4097 replaced by RVN4176 1-CD DOS MTX8000/9000 MTS2000,MT2000*, MTX8000, programmed by DOS which is included in the RVN4176            
RVN4081F 3.5 DOS MTX820/820S/888/888S 6881068C55 R03.00.00 RPX4719G 01/05/98 Yes RTK4205C
HVN9067C CD 95, 98 MTX850/8250 MTX950,9250   R01.03.03 RLN4809A 12/21/2001    
RVN4138B 3.5 DOS MTX-LS 6881078C83 R02.00.00 RPX4719G 06/13/96 Yes RKN4035D
RVN4035B 3.5 DOS MX 1000 6802002F01 R02.03.00 6880309G87 12/13/1995 Yes RTK4203C
RVN4073B 3.5 DOS MX 800 6881064C90 R01.01.00 RPX4719G 12/13/1995 Yes RKN4006B
RVN4134B 3.5 DOS P100 (HVN9175) P200 LB (HVN9794) P50+ (HVN9395) P210 (HVN9763) P500 (HVN9941) PR3000 (HVN9586) 6880901Z52   RPX4719G 7/27/2001 Yes RTK4205
HVN9852J 3.5 DOS P110   R08.00.03 RPX4719G 4/30/96 Yes HKN9755A/REX1143
HVN9262E 3.5 DOS P200 UHF/VHF 6881059C40 R03.01.00 RPX4719G 07/26/01 Yes RTK4205
RVN4129A 3.5   PDT220 6804020C10
6804018C10
R01.00.00   12/13/95    
YVN4051C 3.5   PORTABLE REPEATER 6881075C70 R1.02.00 RPX4719G 5/21/1996   Portable repeater P1820 / P1821AX
RVN4061C 3.5 DOS PP 1000/500 6881125E52 R01.01.01 6880309G87 12/13/1995 No 3080385B23 &
5880385B30
RVN4134A 3.5 DOS PR3000 (HVN-9586) 6880901Z27   RPX4719G 09/22/94    
RVN5002AE 3.5   QUANTAR/QUANTRO RECV. 6881092E25,
6881083E35,
6881096E10
R12.02.00 RPX4719G 6/13/2002 No 3O80369E31
RVN4135A 3.5 DOS R100 (HVN9177) 6880900Z22   RPX4719G 09/22/94 Yes 0180358A52
RVN4135A 3.5 DOS RADIUS MOBILES KIT FOR M100/M200, M110, M400, R100 6880900Z20
6880901Z68
6880900Z22
  RPX4719G 09/22/94 Yes  
RVN4134A 3.5 DOS RADIUS PORTABLES KIT FOR P100, P500, P210, P200 LB, P50+, PR3000 6880901Z91
6880901Z55
6880901Z52
6880900Z56
6880901Z27
  RPX4719G 09/22/94 Yes HKN9755A
MDVN4747B 3.5   R-LINK DEVELOPMENT 6804026C35 R01.01.00   08/05/94    
RVN4146C 3.5   RPM500/660 6802945C40 R02.02.09 RPX4719G 4/30/1998    
RVN4002K 3.5 DOS SABER 6881062C95 R07.01.00 RPX4719G 12/13/95 Yes RTK4203C
RVN4131C 3.5   SETTLET.EXE INSTR. SHEET VER.5.10 6880309G87 4/9/1996    
HVN9007E 3.5   SM50 & SM120 6880903Z78 R05.00.00 RPX4719G 9/1/98 Yes  
RVN4039B 3.5 DOS SMART STATUS 6802976G45 R01.03.00 RPX4719G 12/13/95 Yes FKN5825A
HVN9054D 3.5 3.1, 95, 98 SOFTWARE P1225 6880904Z93 R03.2 RPX4719G 8/23/2000 Yes 3080070N01
HVN9001D 3.5 3.1, 95, 98 SOFTWARE 1225LS 6880906Z25 R2.0 RPX4719G 12/15/2000 Yes HLN9359A
HVN9012D 3.5   SP50 6880903Z25 R04.00.00 RPX4719G 9/2/1998    
RVN4001N 3.5 DOS SPECTRA 6880101W48 R06.00.05 RPX4719G 12/13/1995 Yes 3080369B73(standard)
0180300B10(high pwr)
RVN4099B 3.5 DOS SPECTRA RAILROAD 6802903A55 R04.05.01 RPX4719G 12/13/95 Yes 3080369B73
RVN4110A 3.5   STATION ACCESS MODULE 6880309E35 R01.01.00 RPX4719G 12/13/1995 No 3080369E31
RVN4049E 3.5 DOS STX 6881065C30 R03.01.00 6880309G87 12/13/1995 Yes 0180357A54
RVN4089A 3.5 DOS STX TRANSIT 6881069C55 R01.01.00 6880309G87 12/14/1995 Yes 0180357A54
RVN4007E 3.5 DOS SYNTOR X 9000 (control head) 6880309B25
6880309B26
CH-R07.11 RPX4719G 08/16/94 Yes 0180353A75
RVN4007E 3.5 DOS SYNTOR X 9000 (radio) 6880309B24
6880309B25
6880309B26
RD-R08.01 RPX4719G 12/13/1995 Yes 0180353A75
RVN4102A 3.5 DOS SYNTOR X 9000 DUAL 6807992D52 D07.03.SP01 RPX4719G 12/14/1995 Yes 0180353A75
RVN4069A 3.5 DOS SYNTOR X TRK'D. 6880310B42 R01.00.00 6880309G87 12/13/1995 Yes 0180353A75
RVN4009F 3.5 DOS SYSTEM 9000E 6880101W98 R04.10.04 RPX4719G 12/13/1995 Yes 0180353A75
RVN4051F 3.5 DOS SYSTEMS SABER 6881060C25 R04.00.00 6880309G87 12/13/1995 Yes RTK4203B
RVN4075D 3.5   T5600/T5620 SERIES 6802981G35 R04.00.02 RPX4719G 12/13/1995 No 3080385B23
HVN9060D CD   TC3000, TS3000, TR3000   R01.02.01.01 RLN4997A 3/20/2002    
HVN9060B CD   TELARIO TMT   R01.00.03.01 RLN4997A 08/11/00    
RVN4123G 3.5 DOS VISAR PRIVACY PLUS 6881073C90 R04.00.01 RPX4719G 01/31/97 Yes 3080371E46
RVN4333A 3.5   VRM 100 TOOLBOX 6802944C40 V3.70 RPX4719G 06/28/96   FKN4486A cable & adapter
RVN4133K 3.5   VRM 500/600/650 6802946C95 R03.01.03 RPX4719G 6/18/2002 No  
RVN4181E CD 98, ME, NT, 2000, XP XTS2500/5000 PORTABLES 6881095C44 R01.04.01 RPX4719G 7/26/2002   RKN4105A/RKN4106A
RVN4100 replaced by RVN4182 or RVN4183 2-3.5 DOS XTS3000 ASTRO PORTABLE/MOBILE            
RVN4100U 3.5 DOS XTS3000 6881074C70 R09.01.00 NLA - SUBS TO RVN4184 Yes RKN4035D
RVN4182E
contains: RVN4100, important notice sheet, letter
1-CD
2-3.5
98, ME, NT, 2000,
DOS
XTS3000 / SABER (PORT)   R01.04.00 RPX4719G 06/19/02 Yes RKN4046A
RVN4170D 3.5 DOS XTS3500 6881089C82 R02.00.03 RPX4719G 11/09/00 Yes RKN4035D
Forum: Alinco Mods
 Topic: Alinco DR1200T Full Band Mod
Alinco DR1200T Full Band Mod [message #3098] Wed, 29 April 2015 01:06
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Alinco DR1200T Full Band Mod

Step 1. Remove 2 screws located on top of cover.
Step 2. Loosen the 4 screws on both sides of top cover (do not remove).
Step 3. Remove top cover
Step 4. Locate Yellow wire Loop behind tuning Knob (this wire loops from
the control board mounted on front pannel).
Step 5. Cut loop and tape ends.
Step 6. Replace top cover.
Step 7. Reset radio (press 'F' and VCO/M keys together. While holding
down keys turn off and on Power).

Factory settings will be restored however the new frequency range will
be from 132 to 173 MHz. Any memory will have to be reprogramed.
These insructions are from Alinco, I've done them to my set and
it works great.
 Topic: Alinco DR-110 Full Band Mod
Alinco DR-110 Full Band Mod [message #3097] Wed, 29 April 2015 01:04
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Alinco DR-110 Full Band Mod

tep 1. Remove 2 screws located on top of cover.
Step 2. Loosen the 4 screws on both sides of top cover (do not remove).
Step 3. Remove top cover
Step 4. Locate Yellow wire Loop behind tuning Knob (this wire loops from
the control board mounted on front pannel).
Step 5. Cut loop and tape ends.
Step 6. Replace top cover.
Step 7. Reset radio (press 'F' and VCO/M keys together. While holding
down keys turn off and on Power).

Factory settings will be restored however the new frequency range will
be from 132 to 173 MHz. Any memory will have to be reprogramed.
These insructions are from Alinco, I've done them to my set and
it works great.

This modification also works on the DR1200T and DR112 radios. Frequency range
when applied:

130.000 - 169.995
340.000 - 379.995
870.000 - 889.995
 Topic: Alinco DJ-580T Air and Out of Band Mod
Alinco DJ-580T Air and Out of Band Mod [message #3096] Wed, 29 April 2015 01:00
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Alinco DJ-580T Air and Out of Band Mod

This is a very simple mod it will give you aircraft band RX,
from 108-130 Mhz AM. On the first part and RX/TX from 130Mhz-
170Mhz on VHF and 415 - 470 Mhz on UHF (Approximate).

1. Remove the battery from the radio.
2. Look at the bottom of the radio where the battery mounts.
3. Locate four screws that hold the battery mounting plate to the
bottom of the radio. Remove these four screws.
(Be careful, the screws are SMALL!)
4. The battery plate is still attached by two wires but there should
be enough slack in them to get around the plate with a pair of
cutters.
5. With the radio's keypad and display facing up, locate a loop of
red wire on the right side of the radio interior.
6. Cut this wire for AM Aircraft band RX.
7. On the left side of the interior, locate a loop of blue wire.
8. Cut this wire for TX/RX as described above.
9. Insulate the exposed ends of these wires so they do not short.
10.Re-attach the battery mounting plate and replace the battery.
11.With the radio off, hold down the function key and turn the
radio on.

73 de Tom/N6ZXY@W6QFK.#SOCA.CA.USA.NA
 Topic: Alinco DR-430 Extend Transmit Mod
Alinco DR-430 Extend Transmit Mod [message #3093] Sat, 28 March 2015 02:51
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Alinco DR-430 Extend Transmit Mod

This is the Alinco DR-430 Extended TX modification. This modification will expand TX coverage to
403-499 MHz. Please follow the steps and do the work CAREFULLY! This modification works great
in my rig and I assume this modification will work on almost all 430's (no warranty implied).

1. Unscrew the 3 small screws on the top cover.
2. Gently remove the top cover.
3. Cut the little loop wire (blue) that's located just behind the display, 2" left from the Power
button.
4. Reassemble the radio.
5. Reset the radio's CPU by turning power ON while pressing the F key.

73's & DX de Eduardo "Ed" Sweet - LU7AKC.
Packet radio: lu7akc @ lu7akc.#col.cf.arg.soam
Internet: postmaster@asarin.org.ar
 Topic: Alinco DJ-560-T Extend Transmit Frequencies Mod
Alinco DJ-560-T Extend Transmit Frequencies Mod [message #3092] Sat, 28 March 2015 02:49
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Alinco DJ-560-T Extend Transmit Frequencies Mod

The following modifihoneyion to the Alinco DJ-560-T will enable it to transmit out of band. Rumor: may
also enable cross-band repeat.
1. Turn power off.
2. Remove battery.
3. Unscrew stainless steel battery connector plate. This is the rectangular s/s plate found at the
bottom of the unit and is held in place with (4) small chromed, Phillips head screws.
4. Remove Antenna.
5. Unscrew the one black head, Phillips head screw found immediately adjacent to the BNC.
6. Carefully remove the grey DIAL, UHF and VHF plastic knobs.
7. Unscrew the lock ring nuts that are found under each of the three sets of knobs.
8. Gently remove the plastic top cover on the unit.
9. Unscrew the (4) black head Phillips screws that hold the body halves together.
10. Place the unit face down on a work surface that is covered with a towel or a similar soft cloth.
This will protect the unit from being marred while you work on it.
11. Gently separate the two body halves about 1/2" to 3/4".
12. Cut the ORANGE wire loop and reseal the exposed ends with heat shrink tubing.
(NOTE: if your DJ-560T is serial numbered from #0636-0705, the loop will be YELLOW in
color! However whichever the color, cut only the loop! It will be the only loop to be found!)
13. Reassemble the unit in the reverse order of the above instructions.
14. Reset the CPU by holding the 'F' key (above the PTT key) down and turning on the unit.

[Updated on: Sat, 28 March 2015 02:49]

 Topic: Alinco DJ-120 Extend Frequency Mod
Alinco DJ-120 Extend Frequency Mod [message #3091] Sat, 28 March 2015 02:47
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Alinco DJ-120 Extend Frequency Mod

Hi all, i have recently heard of a mod for the alinco dj-120. The mod opens up transmit from 130
mhz to 174 MHz.
To do this, please folow these simple procedures:
1. Open the front and top case of the ht.
2. Look for 2 jumpers, one vertical, on horizontal next to the microprocessor and cut both of
them.
3. Reset the microprocessor by pressing the reset button on front panel.

Be careful! that will reset all memories stored in the radio
 Topic: ALINCO 22T/E.24E/T Microphone Wiring Pinout
ALINCO 22T/E.24E/T Microphone Wiring Pinout [message #3083] Wed, 18 March 2015 00:58
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ALINCO 22T/E.24E/T Microphone Wiring Pinout

1. Mic
2. PTT
3. Down
4. Up
5. +8 Volts
6. N/C
7. Mic Earth (ground)
8. Ground

ALINCO 22T/E.24E/T Microphone Wiring Pinout
View from front of transceiver

[Updated on: Wed, 18 March 2015 01:02]

 Topic: ALINCO DMR610 DR-135 DR-435 Microphone Wiring Pinout
ALINCO DMR610 DR-135 DR-435 Microphone Wiring Pinout [message #3082] Wed, 18 March 2015 00:54
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ALINCO DMR610 DR-135 DR-435 Microphone Wiring Pinout

1. Mic
2. PTT
3. Down
4. Up
5. +5 Volts
6. Remote Control
7. Screen Earth (ground)
8. Ground

ALINCO DMR610 DR-135 DR-435 Microphone Wiring Pinout
View from front of transceiver

[Updated on: Wed, 18 March 2015 00:55]

 Topic: Alinco DJ-162 Mod Extended RX/TX
Alinco DJ-162 Mod Extended RX/TX [message #2997] Sat, 06 July 2013 01:09
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Extended RX/TX for Alinco DJ-162

1. Remove the battery pack. Remove the battery plate from the bottom of the radio.
2. Remove the back cover from the radio. This is a tedious process. You must take the knobs off the top and remove the top plate first.
3. Under the Battery clasp on the side of the radio (The little sliding thumb switch that keeps the battery from falling off the radio) you will find a yellow loop of wire. This loop is small and hard to get to. You will need a very small pair of cutters or scissors.

--Cut this wire.

4. Put the radio back together

5. Reset the radio. (You will lose your memories)

6. Go to the VFO mode.
Pressing the 'B' key on the keypad will now allow
you to cycle through the extended rx bands. It will cycle from 2 mtrs, am aircraft, to 800. The radio does NOT have the guts to receive 800. It just happens to be in the processor so don't waste your time listening.

7. This same jumper also opens extended transmit.

Ron Wright - KA5LUG
 Topic: Alinco DJ-160 Mod Extend TX
Alinco DJ-160 Mod Extend TX [message #2996] Sat, 06 July 2013 01:04
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The new Alinco DJ-160 Radio will receive between 137-174 Mhz, and transmit in the 2Meter band only (144-148Mhz). A simple modifihoneyion to the radio will enable it to transmit in the full range it receives currently. I have not tested the output power on other frequencies (Due to my one and only watt meter getting fried) however I have tried setting a weather receiver a small distance away, and I did hear the radio in the receiver. To make the mod, the following must be done: (I assume that you have some experience with electronics and that you can tell a wire from a resistor, from a transistor)

1) Take the battery of the radio by lifting the battery release button. If you look at the bottom of the radio, there will be a metal plate that is held on with 4 small screws. Take this plate off, noting exactly how the clip was held on (like the slot for the battery release clip)

2) On the back of the radio there are two screws that hold the back of the radio on, take these screws out.

3) Now you should be able to lift the bottom part of the radio by the battery release button slightly apart. I was told that you should take the top knobs off, but I found that I didn't have to.

4) If you take the Battery Release Button and turn it about 90 degrees, the button should come out easily. After you get the small piece of plastic that is the button, you should see a yellow wire behind where the clip was.

5) Take a small wire cutter and CUT this YELLOW wire. You should probably make sure that the wire doesn't have bare metal showing from a lousy cutter, because I don't think that grounding this wire to the case would be HEALTHY for your radio. Smile

6) After You cut this wire. Assemble the radio, and just before you turn on the radio, do a power reset by holding the FUNC button while turning on the radio. This will reset the radio to ALL of the factory set parameters. YOU WILL LOOSE PROGRAMMED REQUENCIES that were programmed into the memory mode of the radio, so just write the frequencies down before proceeding with the above instructions.

7) The radio should be just like new, except that the transmit will be enabled for ALL frequencies! GOOD Luck!

If you use these mods for ILLEGAL purposes, pity upon thy sole, for you do not belong in the ranks of Amateur Radio. This
information is only supplied for Legal and Informational Purposes
only and I can NOT be held responsible for anything that you do with this INFO. And if you screw up your radio, TOO BAD. I can't be held responsible.

Name: Donald L. Schleede
Call: KB2LZF

[Updated on: Sat, 06 July 2013 01:06]

Forum: Antennas and Feedlines
 Topic: 10 Meter EH Antenna
10 Meter EH Antenna [message #3095] Tue, 31 March 2015 23:57
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10 Meter EH Antenna by Lloyd Butler VK5BR

AN EH ANTENNA FOR 10 METERS

This is a companion to the 20 and 40 meter L+L EH Antennas published in the April 2003 issue of Amateur Radio

Originally published in the journal "Amateur Radio", September 2004


Introduction

Here is a 10 meter version of the EH antennas published the April 2000 issue of Amateur Radio and which was assembled at around the same time. However it was put aside because of the problem encountered with interaction between the antenna tuning and the coaxial feeder. At that time I had not learned how to prevent this with a coax trap. The antenna has now been fitted with a tuned trap at its base and this has stabilized the tuning to the extent that any interaction is now negligible.

Circuit Diagram

The antenna has the same basic circuit arrangement as the 20 and 40 meter versions previously published and which use the L+L balanced type of matching network. However also added is the tuned trap to eliminate interaction between antenna tuning and the coax feeder. For detail of operation of the matching network and why the trap is fitted, refer to my previous articles listed under the "Reference" heading. Circuit detail for the 10 meter antenna is shown in figure 1 in attached PDF.

Assembly Detail

The assembly is shown in figure 2. As before the host material to support the dipole cylinders and the matching network is PVC plumbing tube. Again the dipole cylinders fit on the inside of the tubing and are made of aluminum tubing which I recovered from the broken tiller of one of the boats we used to sail. More of the tubing is used for the capacitor stators fitted inside the PVC tube.

The slider sections of the capacitors were also made from thin aluminum tubing with a portion of the side cut out. I recovered this from an old IF can previously used in a valve superhet receiver.

Fortunately I had left plenty of PVC tube spare at the bottom of the antenna, below the input connector and in this space I wound 8 turns of RG58 coax around the PVC tube to form the coaxial inductor for the trap. This measured about 1.7 uH and was resonated around 29 MHz with a 10 pF capacitor. I find the easiest way to check its resonant frequency is to poke the dip meter coil up the center of the PVC pipe. (This must be done with input and output leads disconnected so that the trap is not too loaded for the dip to appear).

I measured the through signal loss of the trap into 50 ohms resistance. Loss was so low that I deemed it negligible.
Without the trap, the antenna was a crazy thing to adjust. With the trap fitted, tuning was as stable as a rock.

Previous tests that I had carried out on a 20 meter L+L antenna indicated that the signal tended to be skewed upwards if the trap was fitted close to the input connector rather than a short distance down the coax cable. I wondered how this 10 meter antenna would perform with the trap so close. I carried out some very rough tests in the backyard and indications were that the signal was spread at right angles and upwards at around the same field strength. So there seemed to be some evidence of this skewing and that the antenna might perform about the same
for high angle and low angle transmission.

Summary

Described is a 10 meter version of the EH antenna using the L+L type matching network. Included in the assembly is a tuned trap which is effective in inhibiting out of balance current
on the coax feeder and eliminating interaction between the feeder and the antenna tuning.

Extensive field measurements have not been carried out but limited tests, with the trap fitted as shown, indicate that field strength could be similar for both low and high angle radiation.

Addendum, June 2005

Since this article was prepared and subsequently published, it has become clear that these antennas work much better if a short coax tail is allowed to be active in series with the antenna input connector. I would suggest that instead of installing the trap at the bottom of the PVC tube, put it in series with the coax cable, 1 meter down from the antenna input connector. Of course without the trap on the PVC tube, the input connector is connected directly to the matching network.

Forum: Yaesu Mods
 Topic: Yaesu VX-5R TX/RX Expand Mod
Yaesu VX-5R TX/RX Expand Mod [message #3094] Tue, 31 March 2015 22:57
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Yaesu VX-5R TX/RX Expand Mod

Expanded range
RX 137 - 174 MHz
TX 140 - 174 MHz
TX 420 - 470 MHz

1. Remove Battery and Antenna
2. Remove the cover for Pressure Sensing Unit (SU-1). See Owner Manual
3. Remove the SU-1 Option board (if installed)
4. Locate solder pads on lower left side
5. Remove solder from the fourth pad from the left (JP5)
6. Reassemble the radio
7. Reset the microprocessor. (Press and hold [ MR ] & [ VFO] & [4 ] and turn on the radio.
 Topic: Yaesu FL-7000 10 Meter Transmit Mode
Yaesu FL-7000 10 Meter Transmit Mode [message #3090] Sat, 28 March 2015 02:43
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Yaesu FL-7000 10 Meter Transmit Mode

1. Remove power and all other cables.
2. Remove 4 screws from top cover.
3. Remove top cover and right and left panels.
4. Remove 4 screws from power combiner unit and remove screen plate.
5. Locate switch so1 on the cpu unit and set to off position ( a small screwdriver can be used to reach switch)
6. Reassemble unit.
 Topic: Yaesu FT-470 Cross-Band Repeat
Yaesu FT-470 Cross-Band Repeat [message #3089] Sat, 28 March 2015 02:41
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Yaesu FT-470 Cross-Band Repeat

If you turn on the radio with the RPT key depressed, the radio becomes a crossband repeater. Dial up two frequencies you want to crosslink (be sure to pay attention to transmit offsets, if any), turn the radio off. Depress the RPT key while turning it back on.
The tone encode/decode flags and the -+ flags will be flashing. When either band's squelch opens, the other band is moved into the primary frequency display and the transmitter keys.
Note that the power output is decreased to LOW power. I made up an audio interface, using a mini and sub-mini phone plug. Tie the grounds together, and connect the center pins through a 0,01 uF cap. and 47K resistor in series.
Adjust the volume control to about the 11 O'clock position. It work for both simplex cross-band and using a repeater on one band and a simplex freq on the other band. You do have to wait for the repeater to drop before you transmit on the simplex freq.
 Topic: Yaesu FT-470 RX Frequency Expand Mod
Yaesu FT-470 RX Frequency Expand Mod [message #3088] Sat, 28 March 2015 02:39
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Senior Member
Yaesu FT-470 RX Frequency Expand Mod

1. Program 144.000 simplex into VHF vfo.
2. Press Function key F/M and then press RPT key to obtain the repeater shift.
3. Enter the code 0000 (four time zero).
4. Turn the radio off and then back on.
5. Press the RPT key twice to set + offset.
6. Press REV key once. Now display is 1.144.000 MHZ.
7. Enter this freq. into the U memory (Upper scanning limit) without the repeater offset.
8. Now from 1.144.000 MHZ with + displayed in VFO, go to 1.100.000 MHZ. The fastest way is to push F/M key and
DOWN key but if you pass 1.100.000 MHZ, you will need to restart from the beginning.
9. Push REV key to obtain 100.000 MHZ on the display.
10. Enter this into the L memory (Lower scanning limit) without the repeater offset.
11. Enter a value of 200.000 MHZ in U memory.
12. Now you can use the two limit memories L AND U as a third VFO able to scan from 100 to 200 MHZ (push F/M and MR
when you are in L memory).
13. For UHF repeat same process at UHF vfo starting from 430.000 MHZ to obtain a range of 400 to 500 MHZ.
14. The sensitivity is lower than specifications outside the amateur band, but there are many transmitters you can stil
monitor.
15. After this modifications restore your repeaters offsets.
 Topic: Yaesu FT-301D Display Replacement Kit
Yaesu FT-301D Display Replacement Kit [message #3026] Sat, 01 March 2014 03:58
HB9GAA  is currently offline HB9GAA
Messages: 1
Registered: February 2014
Location: Switzerland
Junior Member
Yaesu FT-301D Display Replacement Kit

Hi, I developed a kit to replace the display board for the FT- 301D. No SMD were used and the kit can be assembled by a radio amateur in about an hour . The new display has, in addition to the frequency display, various advanced features. For example, the supply voltage of the FT- 301D can be measured or the band limits according IARU can be signaled. For disabled HAMs the displayed frequency and voltage is output in Morse code. With an IR remote control parameters can be changed. The software can be updated via the USB interface. A user manual is available on http://shop.elcon.ch/pd-1503415091.htm?defaultVariants=searc h0_EQ_Bausatz_AND_{EOL}&honeyegoryId=1 . The selling price of the kit, depending on demand, is about $90 plus S&H. If you are interested, please write me to hb9gaa@arrl.net[/email] 73 de HB9GAA, Roland

[Updated on: Sat, 28 March 2015 02:37] by Moderator

 Topic: Yaesu FTM-400 DR Extended Band Mod 136-174 / 400-480MHz
Yaesu FTM-400 DR Extended Band Mod 136-174 / 400-480MHz [message #3025] Tue, 21 January 2014 01:13
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
New frequencies after the modification:
136-174 mhz RX/TX
400-480 mhz RX/TX

1. Open the upper shell (speaker)

2. Lithium battery located on the left side

3. Identify positive symbol on lithium battery

4. Remove resistance as shown in photos

5. Perform a CPU reset (page 61)

http://www.hamradio.cc/images/forum/mods/5130_FTM-400-MOD2_thumb.JPG

http://www.hamradio.cc/images/forum/mods/5130_ftm-400-mod1_thumb.JPG

*NOTE: Mod will not work on US version

[Updated on: Tue, 21 January 2014 01:17]

 Topic: Yaesu VX-8R Mod Out of band
Yaesu VX-8R Mod Out of band [message #2995] Sat, 06 July 2013 00:13
root  is currently offline root
Messages: 192
Registered: December 2004
Senior Member
The software mod did not work at all. Then I initially cut the track leading from the resistor, without actually removing the resistor. This opened up the 1.2m band (220 Mhz, which was not available prior to cutting the track)but did not expand the other bands.

Later, I actually removed the resistor. This opened up the other bands, the 2 meter band now has a working bottom edge at 140 Mhz, everything (including ARS) works.

I suspect that the software mod would now also work, and I could change the country code as described in an earlier post, but I haven't bothered as there isn't anything in the 130 - 140 Mhz range I am currently interested in. If anyone has a similar experience and also tries changing the country code via the software mod I would be interested in hearing about the experience.

by Donna Murray
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