On 05/05/2018 11:50 AM, Jules Richardson via cctalk wrote:
On 05/05/2018 04:57 AM, Mattis Lind via cctalk wrote:
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.
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
