[AMRadio] Source of very nice inductor and variometer for ATN

Bill Smith hbco2 at sbcglobal.net
Wed Apr 11 19:28:47 EDT 2007

What a horrible thing to do to a RA1000.  :-(

Better to put up a tuned antenna, and restore the RA1000 to service.  :-)

73 de Bill, AB6MT
hbco2 at sbcglobal.net

----- Original Message ----- 
From: "John Lyles" <jtml at losalamos.com>
To: <amradio at mailman.qth.net>
Sent: Wednesday, April 11, 2007 4:32 PM
Subject: [AMRadio] Source of very nice inductor and variometer for ATN

> A classic balanced line antenna tuning network can be built from the
output components of a Raytheon RA1000 1 kW transmitter. It was one of the
few that used push pull 833As in the RF, and had a symmetric tank with a
huge inductor having a small motorized variometer (link coil) in the center
for the antenna connection, and a split variable capacitor. The inductor was
for AM band, so it has enough L to work down to 160 as well. Keep an eye
open for RA1000s getting dumped, not too many left.
> 73
> John
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