Old transistor identification

Tech Square

Technical and speculative discussion of amps, cables and other topics.

I have a set of old TO-3 transistors pulled from an old HarmanKardon unit. They are labeled SDT-9261 and - what I assume is the date code of 6741. Best I can tell from my measurements, these appear to be NPN with gain ranging from 7 - 17. The HK unit was a low power receiver/turntable combo unit. The manufacturer marking is a capital "S" in a vertical rectangle (STMicroelectronics maybe??) There are also 2 other TO-3's that are fairly pitted on the outside and are hard to read, but I think they are labeled 86 5043 2, then below that VFS2745K. No manufacturer marking is apparent. Any ideas? Thanks.

This post is made possible by the generous support of people like you and our sponsors:

McShane Design

Topic - Old transistor identification - bevo 09:40:23 09/21/09 (2)

RE: Old transistor identification - stellavox 18:31:56 02/03/10 (0)

RE: Old transistor identification - llwhtt 20:03:26 10/27/09 (0)

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.