so yesterday @Foone took a neat picture of some really old equipment. but they missed the best part -- i lifted the lid and found some *really neat* electronics inside! 🧵
https://twitter.com/Foone/status/1349584075783196676
here's the inside of the memory hold unit. check out those little modules, the wiring harnesses, and that big circuit board. 
but it gets better! the circuit board unclips and tilts back, and you can see that there's another board underneath, and that these boards are wire wrap panels! i guess yellow was the color of the day. presumably blue was for ECOs.
even the synchronizer unit underneath is interesting. it has a very large circuit board inside.
oh yeah almost forgot, the unit with all the buttons -- uhh, they're all individual panel-mount switches that are hand wired. for some reason i thought there would be a PCB behind the panel with switches mounted on it, but no, this is doing it the hard way!
back to the synchronizer unit: under the digital board is this crazy board full of analog...stuff. this would have been very expensive back when it was new!
finally, the receiver unit at the bottom of the stack. the round thing on the right is an encoder! there's a little tiny flexible shaft coupler that connects it to the knob on the front panel.
similar to the other unit, the PCB tilts up and you can see the wire wrap.
on the front panel they use these really neat bubble-type LED displays instead of the more common 7-segment displays.
all three of these fascinating bits of electronics are still there at Excess Solutions. maybe go buy one and take it apart, and show it to us in more detail!
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