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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!)

Type in the Desired Frequency, Then Click "Calculate"

Bottom Section inches
Top Section inches
Matching section inches

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

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