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WTB: Select-A-Tenna
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November 27th 04, 06:00 PM
Yodar
Posts: n/a
wrote:
I would like to find some simple plans somewhere of how to build an
effective indoor antenna for AM radio.
cuhulin
from a Ham on another list whose handle is Bear
The Incredible Almost Ready to Patent Pizza Loop is operational!
15 turns of #24 around the perimeter of a 14" Papa John's Pizza box.
Two sections of the polyvaricap in parallel (about 500 pF) and it's
tuning just past both ends of the AM BC band. Nice sharp tuning and a
good null. Gotta play with the coupling loop. Started out with one
turn on the perimeter of the box... way too much signal for the Sony
to handle. Cut it down to 4" diameter centered in the box... not
quite enough coupling on the high end of the band. Now have it at
roughly 7" diameter and just a bit too much coupling. Gonna have to
play with it but I'll probably wait until after nightfall. Might have
to put a 100k potentiometer across the coupling loop to use as an
attenuator.
'Bear' NH7SR
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