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

[Jack Hart]

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 writes:

I have no idea why 2 relays.


jhhaynes at earthlink dot net

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