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DXing on a Hot Tin Roof

T

trusty

I have a longwire that extends the length of my house about a foot above the roof. There is talk in my house about replacing the shingles with a tin roof, This is good for the durability of the roof, but how would it affect DXing MW and SW?
 
It will either de-tune the long wire or the metal roof will act like a reflector depending upon the spacing between the roof and the antenna. The metal roof will attenuate any high angle skip coming in you house if you have indoor antennas.
 
Using the metal roof itself would be a HUGE improvement over a simple wire antenna, if connected to your radio's input.Three items to consider: QRM(man made noise) may increase; it may not work IF local codes require it to be grounded, and; you may need a series attenuator (varicap or potentiometer) to control receiver overloading.
If a wire is your only option, a 3' distance wire-to-roof should de-couple it enough for decent reception.
 
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