Just received the invitation to join this list. Pleasure to be here;
thankyouverymuch.
One of the loop antennas I have built was about 4 feet on a side,
about 4 turns; built for listening to atmospherics, or 'spherics as I
understand they are called. Worked great; had to take it well out of
town, which at that time turned out to be to Coal Oil Point, CA.
Did it near sunset, and heard lots of chirping and whistling. It was
the third most amazing science project I have done.
The instructions for construction of the antenna were from an
excellent book called, "Listen to Radio Energy, Light and Sound", by
Calvin R. Graf (now out of print).
The other loop I built, I didn't really have to build. It was one of
those VHF loops from a portable TV. All I did was add a Germanium
diode and plug it into an audio amp. This one was great for picking up
all sorts of transmissions at the local airport. Mostly radar and
flight path beacons (what are those called)?
-Brian Wesley Rich
Steven Greenfield AE7HD