[Milsurplus] Command Set Transmitter Keying

[Mike Morrow]

>The only relay that operates on key-down in the original system design
>is K52 in the modulator unit.  This relay supplies ALL B+ (Oscillator,
>PA screen, and PA plate HV) to all transmitters in the rack.

I ignored the antenna switching unit relay (K55), modulator MCW and
sidetone oscillator relay (K51), and the receiver rack sidetone
application relays (K1, 2, 3).  These also energize at key-down.

Mike / KK5F