[GreenKeys] Diddle, Real Metal, 1.0 Stop Pulse

[Howard R. Weeks]

In 1960, the Army sent me to about 6 months of TTY repair school at Fort
Gordon, Ga.
Their explanation for the longer stop pulse was to provide enough time for
machines that
were running at slightly different speeds to "get together" before starting
another cycle.  Most
tactical military TTY machines used series governed motors which did not
maintain exact rotation speeds
like the synchronous motors did.  Somewhere, I have a tool box with all the
old tuning forks, spring
guages, bearing pullers, etc.  Had to check the speed of the governed motors
real often.

Howard Weeks
Harlem, GA


----- Original Message -----
From: "Jerry" <gh1lockett at bak.rr.com>
To: "Greenkeys ((E-mail))" <greenkeys at mailman.qth.net>; "Veenstra, Lester"
<Lester.Veenstra at intelsatgeneral.com>; "Bob Camp" <ham at cq.nu>
Cc: "Bill Carver" <bcarver at safelink.net>
Sent: Friday, February 25, 2005 9:59 AM
Subject: Re: [GreenKeys] Diddle, Real Metal, 1.0 Stop Pulse


Surprisingly enough I recall some 30+ years ago when Bill Carver
(k6olg/w7aaz now) and Jim Haynes (w6jve) and I think Larry Laitinen
(wa6jyj/w7jyj) were running a lot of tests on RTTY using just a 1.0 stop
pulse.  All of us were using model 28 machines as I recall.  The model
28's ran 'real busy' when receiving the 1.0 stop pulse and sounded like
they were going much faster than the 60wpm normal speed using a 1.42
stop pulse.

What was really amazing was the copy was noticeably better.  Now that I
think about it, I seem to recall that Bill (k6olg/w7aaz) had designed a
new TU and it was processing the info much better with the 1.0 stop
pulse and a full set of diddles.  These tests were run over some period
of time on several occations, and the copy was always much better.

I just went out and looked in my 'stash' and yep, I still have my
original lash up of Bill's TU sitting on a shelf.  I guess a true
'rtty'er never gets rid of anything, chuckle!

Jer -n6jp-