Ground Plane Antenna Plans for 146 MHz, 220 MHz and 440 MHz
 

 
Solder an inch or so copper tube into the center post of your connector.        Here I used Brass strap for the Radials. Note the concave end of the lower radial.

 
I use a half-round needle file to make the concave cutout.                            Match the end with the raised circular portion of the connector.

 
Mark and drill the holes in the end of the radials.                                         Bolt the radials to the connector as shown. Do all 4 and bend down to 45.


Mounted for testing.  I spray painted the antenna a flat primer grey to protect it, and make it less
reflective to blend into the background easier.  These make great emergency antennas, stealth
antennas, attic antennas, etc.

 

 
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