[time-nuts] Non electrical time-nuttery

[Bill Hawkins]

You're right. Sealed reed relays were the choice for logic.

Not everyone used logic for decade or hex dividers, though. HP
used phantastron dividers in some early tube counters. A Miller
integrator ramped up its output as pulses came in, and a reset
circuit reset the count at a certain level.

This could easily be done with magamps. They were being used in
the fifties for integrators in industrial process controllers.

Bill Hawkins


-----Original Message-----
From: J. Forster
Sent: Saturday, January 09, 2010 5:59 PM

I don't think MagAmps were much used for logic, but Di-an made a family of
core logic that would certainly work for the counters in a clock.

-John