Who knows this TO3?

[jan.didden]

Hi,

I have a bunch of unknown power transistors. So far, have been unable to identify them. I THINK the top # is type#, next is mil part number, bottom one is production date stamp. These are spares for mil systems, could be old, maybe not. Any pointers would be appreciated.

janneman

[Ultima Thule]

Firts two rows, I don't know,
the last one, I guess year 2000 week 42.

Since it's in a TO3 can with such a late manufacturing date it must(?) be some replacement/custom specific transistor(?) for some old equipment when TO3 were common, eg. in the eighties..or so!??

BTW,
Are you sure it's a transistor, are the pins marked with E B for BJT or G S for FET etc?

[tiefbassuebertr]

Originally Posted by janneman

Hi,

I have a bunch of unknown power transistors. So far, have been unable to identify them. I THINK the top # is type#, next is mil part number, bottom one is production date stamp. These are spares for mil systems, could be old, maybe not. Any pointers would be appreciated.

janneman

This is a factory number often also used by types from Bendix, "Delco-GM" and some other US brands. The logo I have never see before.
have a look to this threads
Vintage Transistors
Overview of Brands and Models from first Solid State Audio Amplifier Components want.
and for most logos this URL:
aufzu Halbleiterhersteller-Logos-Ecke