vintage computers in active use and restoring them - test-drb@ccmp.vtda.org

27 May 2016

...
  As far as I can tell, if I suddenly need a specific
SLT module, the
 odds of finding that specific module at any given time on eBay is
 essentially zero. 
Stuff with standard SLT shows up on Ebay quite often. Not every day,
but one could build up a decent pile of SLT cards in time to harvest
from.

...
  Some SLT modules are far more common than others. I
don't know how
 many different SLT modules are used in the 360/30, nor what percentage
 of the SLT modules in that machine are common ones. 
For the standard (slower) families of SLT, their are only a few types
of modules - I might guess only 15 or 20 types in something like model
30. They would likely all be 361xxx parts.

Anyway, if one confines an S/360 restoration project to sources
limited to Ebay and Digikey, one will have a bad time. Look around.
IBM made a huge amount of this stuff, and a reasonable amount still
survives.

--
Will