Anybody been around long enough to explain the theory behind the use of LSB
on the lower bands vs. USB higher up? What is the advantage to doing so?
Early filter rigs used 9 MHz crystal filters. With a 5.0 - 5.5 MHz VFO
(often from a surplus AN/ARC-5 or SCR-274N "Command Set"), you got 80 m
and 20 m. Only needed one BFO crystal that way.
73,
Lyle KK7P
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