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Super J Pole - 2 Meter Antenna Construction 144mhz-148mhz:

Here is a simple Javascript calculator for determining the lengths of tubing to be used for the construction of a Super J-Pole Collinear Design. (Note: It is always good practice to use an Antenna Analyzer when building a custom antenna!)

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Type in the Desired Frequency, Then Click "Calculate"

Frequency

Bottom Section	inches
Top Section	inches
Matching section	inches

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This Antenna, was tuned for 147mhz. When an Antenna Analyzer was hooked to this, it showed 1.0 for a good portion between 146mhz-148mhz at 50 ohms! The rest of the band was 1.1-1.3 meaning it could be used for the rest of the band.

Construction is easy. All of the parts were purchased at Home Depot or Lowes.
(Except for the SO-239 Adapter and the wire!)

Click here for the printable PDF plans for this antenna