[TowerTalk] Vertical on metal building

[Terry Conboy]

At 07:48 PM 2004-10-01, Jim Miller WB5OXQ wrote:
>I wonder how a vertical would perform on top of my office building? Sheet 
>metal roof.
>20' high at center, 18' at eves.  160'X80' dimensions.  I have a tripod 
>bolted at the center that used to be for a tv antenna.  How would a 
>typical hf vertical perform up there?
>WB5OXQ, Jim in Waco

You might want to take a portable HF receiver up there and see what the RFI 
environment is like.  We put a multiband vertical on the roof of a 10 story 
office building and found S9 + 20 dB noise on all bands, apparently from 
the HVAC controls.  We gave up and took it down.

73 Terry