> OK, neet.  That is very similar to the logic used in the tty crypto
> machine I mentioned, except that there was no driver transistor
> required.  The source and destination cores were linked directly with
> just a diode IIRC.  The trigger in this case was a 60V tube-driven
> pulse.

The "trigger" pulses in the 803 were about 800mA I think, and sourced from a
-20V supply. Each current pulse was just under 3uS long. Each logic board
had a pair of OC23 transistors to provide the "alpha" and "beta" phase
pulses.  There's a picture of an 803 board at the bottom of this web
page.... http://bil.members.beeb.net/elliott.html

Peter


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