[Elecraft] OT - anyone have experience with effects of metal roofs on antenna performace?

[Ignacy]

I had verticals on concrete, roof shingle and metal roofs. Always radials
lying on top. The metal roof was the best by far. 

One way to find out how much the roof is affecting the performance of a beam 
is to look at SWR changes as the antenna is rotating. 

Ignacy, NO9E



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