[GreenKeys] DT 600

[Don Cunningham]

Jim,
Since I didn't see a flood of answers to your query, I'll take a stab at it. 
I used a DT-600 for many years and it works well (as well as the ST-6) at 
what it was designed to do.  It was not designed with teletype machines in 
mind, but as one part of a "Data System", using a computer, hence the 
terminology DT-600 for Data Terminal - 600.  It is basically an ST-6 on one 
double sided board, BUT without power supply, loop supply, or AFSK generator 
and it is a single shift unit (usually built for 170 cycle shift).  It takes 
external equipment to be a complete "modem" for model 15 or 28's or a 
computer for that matter.  That said, it is EXCELLENT at demodulating RTTY 
signals IF the toroid coil tuned circuits are tuned right on frequency so 
the shift is close.  Should you decide to get it going and built the other 
devices needed, email and I'll see if I can dig up some info to help you in 
my "archives".  I have one that has been built that I need to make sure 
works and get it going myself.  Of course, if you decide to sell yours, I 
would enjoy building another too, hi.  I have a "basket case" ST-6000 that 
could provide a case and a new XTK-1 AFSK generator that would make a nice 
unit (using the power supply of the ST-6000) and built in 
scope.............hummm, another project, hi.  Let me know if I can help 
further, James.  I LOVE the old TU's.
73,
Don, WB5HAK