[GreenKeys] RTTY in WWII

[Duncan M. Brown]

Joe,

There was RTTY used during WWII, but not much and not much equipment still around.  There was some commercial RTTY before WWII, but it didn't seem to catch on with the military until late in the war.  I have been doing some research on early RTTY and not finding much details.  The AWA Museum has a AN/FGC-1, a diversity RTTY converter in a 7 ft rack made by Western Electric; TM 11-356 dated 1943. (We also have the diversity receiver that went with it, the AN/FRR-3, in another 7 ft rack. Maybe it will be NEXT winter's project to get it running.) See http://www.gordon.army.mil/OCOS/Museum/commwwII.asp for some Army WWII equipment. Some Navy RX converters were the FRA & FRG; TX FSK converters were FSA, FRE, & FSC.  See http://www.virhistory.com/navy/rtty-02.htm for more info.

Your AN/URA-8 is from about 1947; pair it with a RBB/RBC receiver and you would be close to WWII timeframe.

Have fun & 73,

Duncan Brown, K2OEQ
USASA  31J

Chief TTY operator & repairman
AWA Electronic Communication Museum
http://www.antiquewireless.org/


----- Original Message ----- 
From: Joe Stevens 
To: greenkeys at mailman.qth.net
Sent: 31-Dec-08 05:15:42 
Subject: Re: [GreenKeys] Re: Principles of Electricity Applied to Telephone &Telegraph Work


I also have a few editions of this book as well as some Lenkurt Demodulator and a nice pamphlet from AE on relays.  I think these are very valuable and useful resources and I have made a small bit of it available on my site at
http://www.kadiak.org/tel

I have some Hal ST-6s and have been on RTTY since about 1968 but was wondering what would be a correct FSK/AFSK demod for the WWII era?
I am familiar with the WeCo 43 carrier and Lenkurt equivalents and I maintained URA-8 and similar in a prior lifetime.
We have hands-on Model 14, 15s and 28s at our museum and 5th graders as well as adults are very curious about them.  I would like to get them on the air again with a period setup.

(Recent discussions are making me think about a simulated single conductor submarine cable running duplex too.  We have some cable sections of number 10 AWG, stranded, silver plated copper salvaged from the ocean bottom here. http://www.kadiak.org/radios/sub_cable.html )

Best to all,

   ...j0e

WL7AML
Kodiak Military History Museum
http://www.kadiak.org
Kodiak Alaska
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.qth.net/pipermail/greenkeys/attachments/20081231/5227c776/attachment.htm