[GreenKeys] tapping ST-6 for RS232

[Don Cunningham]

You "ain't" run RTTY until you've had cathode resistors smoke in the SB-401 
or T4XB from running them too hard, hi.  (Probably similar with older 
transmitter/receiver pairs).  Those separate transmitter/receiver pairs 
helped us chase each other up and down the band, making it a LOT more 
exciting than my new "super whiz bang" dead on, highly stable, rice box, hi. 
That "floating loop" setup in the ST-5, ST-6, ST-6000 was a neat innovation 
that gave us the FSK pickoff point.  Run to a diode, rf choke and capacitor, 
it made the old Drakes sit up and run.  When we went to 170 cycle shift, 
AFSK was a site easier though, hi.  Thanks for bringing up the memories.  I 
too went through the TRS-80 Model I, Model IV, CoCo, etc up to the  more 
current IBM compatibles.  All could be interfaced through that FSK pickoff 
point.  Joe, help me remember, but wasn't that the point we used to insert 
the UT4 regenerators???  We had to "break" the line, not just pick off from 
it.
73 all,
Don, WB5HAK