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