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

John Lyles jtml at losalamos.com
Wed Apr 11 19:32:47 EDT 2007

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. 

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