sgc528[23] xref

On 11 Oct 2010 14:24:34 GMT, frank put finger to keyboard and composed:

I would think that complementary transistors would have distinguishing prefixes to denote PNP or NPN. Are they possibly house numbers?

- Franc Zabkar

Isn't SGC the prefix for Philips replacement semiconductors?

ECG. They bought the line from Sylvania.

There is a ref to this from 2002

Heathkit Curve tracer.

JC

Why (have distinguishing prefixes)?

SGC5282 NPN 60V 800mA 3W 250MHz SGC5283 PNP 60V 600mA 3W 200MHz

Gee, that was easy!

this might suggest possible replacement, many thanks!

Best regards

Frank IZ8DWF

many thanks, can I ask you where did you find these specs?

Frank IZ8DWF

On Wed, 13 Oct 2010 09:08:03 -0400, PeterD put finger to keyboard and composed:

Yes, you're right. That was a brain fart. I was thinking of Japanese transistors. Put it down to old age.

- Franc Zabkar

Google is your friend, they were from something from (of all places) Heathkit, IIRC. I just searched for the first one, got about 10 hits, and only the last one (a PDF) looked interesting (most of the rest were your query...)

Interesting, I did a google search before posting the request to the newsgroup (and repeated the query right now) and it did always showed two or three results with no meaningful data (other than beeing used in heathkit equipment). No PDF either. I guess google can chose friends then :-) I'd still like to see that pdf if you can post a link please. Best regards.

Frank IZ8DWF

That's a long one!

many thanks, it's a good one to have around when repairing old HW :-) Why I couldn't find this one with google is a mistery.

Regards Frank IZ8DWF

I used SGC5282 pdf or

Perhaps not from Heathkit directly (I didn't check...)

but dealing with Heathkit however. Big PDF, do a search in it, there is only one reference to the parts.