My comments on this…

The antenna has a series of Vertical elements and a series of Horizontal.

You could keep a switch and switch between the vertical grouping or the horizontal. I assume the original antenna had 50 ohm impedance for each grouping with a balun on each group but you would need to locate a manual to verify this or use a VNA/Antenna tester.

You could also feed each of the element groups into a 50 ohm power splitter and then receive or transmit would operate on both horizontal and vertical. The resulting waveform would likely have some phase difference and be complex. You would have noise contribution from the polarization not being used by the receive signal and your output power would be divided.

Another option would be to keep the phasing harness and develop a more complex set of switches so you can select vertical, horizontal, RHC polarization and LHC polarization.

If you do not have a balun you would need to add one or two if you want both functioning. Here is a link to some people making baluns: https://www.balundesigns.com

A nano VNA is a handy device to test this type of thing.

73, Bob N5BRG

On Dec 15, 2021, at 4:18 PM, nick <[email protected]mailto:[email protected]> wrote:

I have a KLM 22c and want to convert it to linear polarization. When I remove the pole switching network what is the impedance of the antenna? 73’s nick k5qxj

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I believe Domenico I8CVS (sk) did a very good article about this several years ago. Should be available somewhere. 73 Bob W7LRD

On 12/15/2021 2:18 PM nick <[email protected]> wrote:



I have a KLM 22c and want to convert it to linear polarization. When I remove the pole switching network what is the impedance of the antenna?

73’s nick k5qxj




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