28 Jun
2007
28 Jun
'07
11:22 p.m.
On Jun 28, 2007, at 6:52 PM, Chuck Guzis wrote:
The "solid state" refers not to transistors
(which were used mostly
to drive indicator lamps), but rather to the magnetic cores used not
for memory, but for logical operations; one clock cycle per core.
The master clock was driven with 6 4X150 power tetrodes.
Very unusual--and very reliable for its day.
4X150s...Are you serious? I've used ham radio transmitting
amplifiers built around those tubes. Why on earth would they need
that much power to drive the clock lines? Were their circuit
impedances that low?
-Dave
--
Dave McGuire
Port Charlotte, FL