[GreenKeys] Let Play.... NAME THAT TU! (or it's designer!)

[COURYHOUSE at aol.com]

Jack will check that  out we  have a copy  of that at  the  museum  Thanks  
Ed# 
 
 
In a message dated 11/3/2013 12:16:20 P.M. US Mountain Standard Time,  
wa2hwj at att.net writes:

 
I don't think  microcomputers weren't around when that TU was built.  
It might be a  version of the IF Converter from the "New RTTY  Handbook". 
Two polar relays  were often used: one to key the TTY and one to key the  
FSK 
circuit in the  transmitter. 
There's a wealth  of information in the old RTTY handbooks. 
Everyone should  have a set of them and read them thoroughly.  
They can answer a  lot of questions. 
Jack  K0TTY 
NNNN 
From:  greenkeys-bounces at mailman.qth.net 
[mailto:greenkeys-bounces at mailman.qth.net]  On Behalf Of 73131.3073 at compuserve.com
Sent: Sunday, November  3, 2013 7:20 AM
To: COURYHOUSE at aol.com;  jhhaynes at earthlink.net
Cc:  greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Let Play.... NAME  THAT TU! (or it's designer!) 
 
Ed  -

Looking at the photos and reading as best I can the markings on the  
controls, it would appear to me that this is some kind of interface for   two 
(mircro) computers to TTY machines. If that is the case, it could explain  why 
there are two polar relays.

Tim Swarthout,  WA5QEG
 

 

-----Original  Message-----
From: COURYHOUSE <COURYHOUSE at aol.com>
To: jhhaynes  <jhhaynes at earthlink.net>
Cc: greenkeys  <greenkeys at mailman.qth.net>
Sent: Sat, Nov 2, 2013 7:00  pm
Subject: Re: [GreenKeys] Let Play.... NAME THAT TU! (or it's  designer!) 
 
 
 
I will  try  to  trace things  out  little!    
 
a mystery  --  yea..
 

 
Ed!
 

 
 
In a message dated  11/2/2013 5:58:22 P.M. US Mountain Standard Time, 
_jhhaynes at earthlink.net_ (mailto:jhhaynes at earthlink.net)   writes:

I  have no idea why 2 relays.


jhhaynes at earthlink dot  net



______________________________________________________________ GreenKeys 
mailing list Home: http://mailman.qth.net/mailman/listinfo/greenkeys Help: 
http://mailman.qth.net/mmfaq.htm Post: _mailto:GreenKeys at mailman.qth.net_ 
(mailto:GreenKeys at mailman.qth.net?)   2002-to-present greenkeys archive: 
http://mailman.qth.net/pipermail/greenkeys/ 1998-to-2001 greenkeys archive: 
http://mailman.qth.net/archive/greenkeys/greenkeys.html Randy Guttery's 2001-to-2009 
GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html  This 
list hosted by: _http://www.qsl.net_ (http://www.qsl.net/)  Please help 
support this email list: http://www.qsl.net/donate.html 





______________________________________________________________
GreenKeys  mailing list
Home:  http://mailman.qth.net/mailman/listinfo/greenkeys
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive:  
http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive:  
http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's  2001-to-2009 GreenKeys Search Tool:  
http://comcents.com/tty/greenkeyssearch.html

This list hosted by:  http://www.qsl.net
Please help support this email list:  http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20131103/28378db3/attachment.html>