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Old 31st January 2004, 11:15 AM   #1
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Default Who knows this TO3?

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
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Old 31st January 2004, 11:48 AM   #2
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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?
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Old 9th June 2010, 10:40 AM   #3
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Quote:
Originally Posted by janneman View Post
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

Last edited by tiefbassuebertr; 9th June 2010 at 10:44 AM.
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