5 May
2018
5 May
'18
5:37 p.m.
On 05/05/2018 11:50 AM, Jules Richardson via cctalk wrote:
On 05/05/2018 04:57 AM, Mattis Lind via cctalk wrote:
Lots of early core memory systems had heated core stacks.
It was a lot simpler to heat the stack to a known
temperature than to cool it. Eventually, they figured out
that you could put a thermistor in the stack and adjust the
half-select currents to follow the temperature characteristic.
But, I think IBM 1620, 709x and 360/30, 360/40, etc had
heated stacks. I think the 360/50 had a heated local store,
but not the main store.
The picture looked just a little big/heavy for flight gear,
but maybe something like the E3 might have gear like that in
the radar data processor.
Jon
It could be flight control related since it is
aviation
museum that
currently have it.
Hmm, 'stack heater' caught my eye... I'm not particularly
familiar with core setups, but I didn't think that was a
common thing, suggesting the possibility of a cold
environment - immediate thought on the back of that was
something on a plane.