Must comment- that the answer is "MAYBE"! It depends on what is
UNDER that roof! If you have metal flashing (near vents, furnace
pipeing), or insulation with a "VAPOR BARRIER" usually, aluminium
foil backed, it may affect your ability to xmit a signal , and in
the case of the latter, might make a great "FARIDAY SHIELD" (signal
proof room)! And this would apply to comercial antennas as well!
Tho, the wood in a roof, and the roofing material should be
generally passive to even UHF, the other materials might be
a problem. Dont give up hope, as have friend witha antenna
(quad), on 6 meters, and 2 meters, in an attic dormer, if it had
been insulated correctly, would have been relatively RF Proof!
Might want to examine it before betting too complex! Jim -NN7K



"jimbo" wrote in message
...


jimbo wrote:


Thanks for all of the advice. I have one more question. Can I tune a
J-Pole antenna in my shop and then move it to the attic and expect the
same performance? In other words, is an antenna an antenna or is an
antenna and it's installation an antenna?

It would seem to me that if the antenna is tuned and works in my shop
it should work in the attic. Otherwise, how do "store bought" antennas
work?

Thanks, jimbo