[Antennas] BCB Loop Antennas

2002年9月26日 22:34:21 -0500 (CDT)

For BCB, a loop receiving antenna can be as simple as a
tuned circuit (consisting of a coil, which is the loop
itself, in parallel with a variable capacitor) resonant
at the received frequency. One side of that circuit is
connected to ground, and the other side is connected to
the antenna input. Alternatively, a BCB receiver with
a builtin loopstick antenna may simply be placed inside
the loop, without any wires connecting the loop's tuned
circuit to the receiver--simply orient the receiver for
maximum received signal, once the variable capacitor has
been tuned for the intended frequency.
The following two URL's pertain to crystal radios, but
the loop antenna can be made the same for other purposes.
http://members.aol.com/stevef88/radioloo.htm
http://www.alphalink.com.au/%7Eparkerp/crystal.gif
I'm sure some creative web searching would turn up a
whole slew of references. Suggested keywords: 
Required [should always be present]:
loop wire variable capacitor
optional [may, or may not, be present]:
wind turns BCB AM MW broadcast band tune
73,
Jim WB5UDE