27 Nov
2003
27 Nov
'03
1:11 a.m.
e.
I found them. I'd still need relay part number 4915. There are also some
things called "thyractors" called for.
Some place in the pdp-8E/M docs there must be specs for the TTY and
reader control circuits. Take a look at the TTY I/O prints and see
what devices DEC used to drive the relay circuit.
Mike
No idea where you'd get the relay these days.
I wonder if you could
design a solid-state switching circuit that would work, with an
opto-isolator on the input
Maybe, if I had specs for the relay. If I had the specs, I might even be
able to tell if I have a prayer of delivering sufficient drive current,
though I'd still prefer to test on real hardware before having a bunch of
boards manufactured.
Vince