[Elecraft] Sideband, Which Sideband? (WAS: K1 on USB CW)

[Stuart Rohre]

The use of the conversion from 5 MHz VFO is indeed how the USB vs. LSB
convention got started.  With 9 MHz IF you got 4.0 MHz (80M) and 20M, (14
MHz.)   9 -5 in one case, 9+5 in the other, with opposite Sidebands.

The first use of such was probably the Central Electronics or similar tube
transmitters in the early SSB days of the 1950's.

In 1967, I had my electronics class, that I taught in 9M2 land, build a
transistorized transmitter using the dual band scheme from "The Transistor
Radio Handbook" by Les Earnshaw, ZL1AAX, who later came to USA and founded
Kachina Communications, of the first PC radio fame.

This is a neat way to get two bands from one VFO and common components of
the times.
72,
Stuart
K5KVH