[Elecraft] USB on all bands ??

[Lyle Johnson]

> 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