Tuesday, November 6, 2018

How a simple counterpoise can lower your SWR. Post #1670.


If you can't view the video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=SwhlSa8CUCk.

Here's a simple way to lower the SWR and increase the performance of any HF/VHF/UHF vertical antenna.  Pet (N6PET) found a high SWR on his Comet SBB 15 6M triband mobile antenna. By mounting the antenna on a 2M quarter wave counterpoise made from 2 speaker wires, he was able to drop his SWR below 1:3:1 for the frequency range of 50-54 MHz.  Most conventional wisdom seems to favor the idea that the counterpoise system supplies "the missing half" of a 1/4 wavelength vertical, thus restoring antenna "balance."  If you use vertical antennas, please consider adding a ground radial or counterpoise system to improve antenna efficiency and matching between the antenna and your transceiver.

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Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).