[MRCG] RTTY

[Ed Zeranski]

UCC-1v, tone diversity multiplex, became the norm for Navy broadcast traffic 
in the late '60s.  It was one of the big reasons for the R1051 replacing the 
R390A. If you had more than 3 Hz(cycles back then) drift it caused garble 
and no copy. The channels off the 1051 fed KG7s, 14s, or 37s.  R390As were 
still used on CW and point to point ckts. I remember getting traffic on 
mity-mite rtty sets and watching the poor little things beat themselves to 
death.  28s could do 24/7 Navy RATT traffic but the airborne mites couldn't 
hack the duty cycle. My friend Gary Sinn RMC  KM6A taught tty maint at NTC 
and would just shake his head.

EdZ KG6UTS





Indeed - a "tone-pack" unit such as the AN/UCC-1 could squeeze 16 RTTY
channels into a 3kc voice bandwidth.
...cheers,
Nick England K4NYW
www.navy-radio.com