[GreenKeys] More 28ASR K-KT-T madness

[Nick England]

 I dunno - I never worked on those things. But FWIW, I do have USN
installation drawings that all include the step pulse connections from KW-7
back to TD and Keyboard.
And all the Navy's low-level 28ASRs had two clutch magnet drivers (in ESA
323812) - one for the keyboard and one for the TD.
http://www.navy-radio.com/manuals/tty/wd/ugc48a-wd.pdf

I wonder why it seems like the Navy made a big deal out of KW-7 syncing but
the Army and Air Force evidently didn't. Was it a low-level signaling
thing? Something related to long distance HF radioteletype?

Hmm, Jerry Proc's KW-26 page has info about running in "cable mode" (Speed
Normalizer) which was 57-58 wpm. In that case you'd have to throttle down
the TD by using a sync pulse. Maybe the KW-7 provided step signals so you
could use the TTY equipment on either KW-7 or KW-26?

The Navy's later AFSK receive converters also had a "secure" mode that
synced the incoming bit stream to a bit clock - which only worked on 7.00
and not 7.42 characters of course - drove me crazy troubleshooting one of
these things until I discovered the secure switch was on. What was that
for? Satellite stuff?

I'm just guessing in the almost total darkness here - Maybe some day the
NSA will process my FOIA request and send me KW-7 and KW-26 manuals - not
holding my breath though...
Nick England K4NYW
www.navy-radio.com
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