5440 5B40 update:
U165 is toast. The trigger signal arrives, in-spec, to it, and does not depart. There's no blown tant on its supply; it has just below 5V on the supply pin, and it's not noisy. It does also draw some power.
Parts list sez:
U165 155-0109-00 B010100 B021739 MICROCIRCUIT,LI:MONOLITHIC,TRIG 80009 155-0109-00
So, a quick Ebay glance gives that it is not Unobtanium; there are a couple sellers on the bay who want around 25 money for one, plus transatlantic shipping. Stiff prices, them. Does anyone here sit on a few?
Look for the part in Tek wiki and then check eBay for plugins to sacrifice
I will keep an eye out at Newbury. Lots of Tek stuff appears there usually.
Thanks!
Shipping is a killer for most deals I can find on the bay. And some parts units are just that, "some parts", but not all:
Did find a trigger board with the right IC pair on though, and in Europe at that. Will hold for Newbury results to come in.
These are modules that use the part:
5B25N
5B31
5B40, 5B42 (U300, U400), 5B44
7B50A, 7B53A
7B80, 7B85, 7B87, 7B81P, 7B90P
7612D
7S14 / 5S14N (U270)
SC502, SC503, SC504 (U3238)