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Tube❄️Time

twitch.tv/tubetimeus let's do some more board layout -- this time, i'm cloning an IBM PS/2 model 80 memory card (gee i wonder why)

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Tube❄️Time replied to Tube❄️Time

some folks are wondering what those metal cans are in the other post. here's a handy reference chart from IBM that shows modules with the lids removed.

SLT: ceramic slab with discrete diodes/transistors
ASLT: two stacked ceramic slabs
SLD: solid logic dense; just more parts crammed on a single slab
MST: ceramic slab with one or more IC die flipped over and soldered down with solder bumps.
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