ARRL

W4PG

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

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Topic Author Posted On
R-7 and metal roof KA0LDG on 11/10/11
I had an R-7 mounted a foot above the top of a chimney that had a metal cap. The antenna was seriously detuned, especially on 40 meters, where resonance was about 6.8 mHz. I raised it up several feet above the top, and that improved but did not completely resolve the issue. It's not the same as a metal roof, but an example of what might happen.

.............Bob

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