[Elecraft] Horizontal Loop Antenna

[Stuart Rohre]

Whether you will get good results with your loop under the shingles depends 
on the amount of metal flashing on the edges of your roof.  Also, on the 
amount of metal enclosed by it in your attic.  we tried one on a Red Cross 
building that had perimeter flashing and even on standoff insulators, the 
loop was a poor performer.  The insulators were 5 inches away from the 
flashing.  Perhaps the flashing was the shorted turn syndrome.

A dipole NVIS antenna has worked much better above this particular 
commercial flat roof.

Under the roof were red iron bar joists, which also are grounded.

Stuart
K5KVH