[GreenKeys] AN/MRC-2 US Army's first deployable RTTY??

[Duncan M. Brown]

"Short Number" & "Long Number" sounds like a good description!

Although I was trained as a TTY repairman by the Army, I knew as much (if not more) radio from my ham radio background as the Army trained radio repair guys.  I had to tell them how to fix the T-368 in our AN/GRC-26D a couple of times.

Duncan


----- Original Message ----- 
From: 
To: duncanancy at earthlink.net;greenkeys at mailman.qth.net
Sent: 15-Jan-10 11:41:32 
Subject: Re: [GreenKeys] AN/MRC-2 US Army's first deployable RTTY??


Duncan,

I and a few others refer to the 'Old" system (which dates to 1940) as the "Short Number" system.  The new one that was phased in beginning around 1955 is obviously referred to as the "Long Number" system.  To my knowledge, no manual was moved from Short to Long simply by having its number changed (as happened with a few pieces of hardware).  The set of manuals on a few pieces became mixed, mostly by having short number operations and maintenance manual and long number parts manual.  There were also a very few cases of an in between system.  For example, the T-368/URT manual started as TM 11-809.  Then it was split into TM 11-809-10, -20 and -35.  Which were never re-done as TM 11-5820-nnn-nn.  But the parts manual shifted from SIG 7 & 8 T-368/URT to TM 11-5820-258-20P and -35P.  

Incidently, I've been looking for TM 11-5820-258-35P for a long time.  If anyone has or knows of a copy, please contact me.

The T-368 would have been the transmitter in your AN/GRC-26D.

In a message dated 1/15/2010 8:41:45 AM Central Standard Time, duncanancy at earthlink.net writes: 

Bob et al, 

Thanks for your description on the old TM numbering system.  I know the "new" numbering system (eg TM 11-5815 = TTY), but never looked at the old numbers enough to see any "system."
  
How many pages in MC-543? What does it cover/  Is it available scanned or for sale??
  
I forgot to mention that I helped maintain a AN/GRC-26D in Viet Nam in a support company to the Big Red One.
  
  
have fun,
  
Duncan





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