Author Topic: Power NPN transistor for an amp, but what is it?  (Read 2206 times)

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Offline saturn5tony

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Power NPN transistor for an amp, but what is it?
« on: March 28, 2016, 06:41:28 PM »
Hi Gang,
I got a few of these really cool NPN power transistors to build a nice power amplifier Ive been rattling in my mind for a few months. Really old but they test fine on my transistor tester and there gold plated too, lol.

What is very odd is the number on them is not on the net at all! I mean no where. Ebay, alldatasheet, alibaba, ext, really no where. Maybe some of you may have come across them? They look like they can handle a few amps but thats because they are in a TO66 package. They have a gain of about 80 or so and are BJTs from the early 70's. On the top is a cryptic number U6X and then under it 15H. There is what looks like a part number on the side ZA1023? Heres a pic

Oh well, if anyone has ever used one, from that time and/or are better tranny guys than me and may have a spec sheet or just seen it, please reply. Thanks!!