Transistor help

[TigerAmps]

Hi - I am looking for info about a GE transistor. The markings are "GE-14 Japan". It sits in an amp that dates to 1973.

Thank in advance.

[The Dude]

The only thing I could find is that the NTE130 is supposed to be the equivalent. Somewhere at home, I have an old GE book. I'll see if I can find it at the next opportunity.

[Jazz P Bass]

Without knowing exactly what the transistor is, the next step in repacing it would be to identify what it does.
The case style appears to be TO-3.
So is it being used as an output transistor?
If so, what type of an output circuit is it?

Is it's mate on the other side of the circuit the same number?

What is the B+ voltage?

[TigerAmps]

I don't have the amp yet; I will pick it up tomorrow.
The transistors appear to be used as output devices.
All 4 transistors are all the same number so I am guessing that the output stage is similar to an Acoustic 126 or similar.
It does not power up; not sure why as I don't have it yet.
All the caps are rated for 100V.
I was hoping that the GE-14 marking would be similar to the RCA 48-15 and someone would recognize it of know what it means to get a data sheet.
I googled it but did not find much on GE transistors from the early 70's.

Here is what they look like:



When I get the amp in hand, I will post more pictures ....

Thanks

[The Dude]

Well, of course, make sure they are bad before replacing any of them. I also notice, although only partially in the photo, that there appears to be a filter cap lifted and hanging disconnected.

[Jazz P Bass]

That "GE-14" looks like a house number.

Be real careful in there because there a lot of transistors (the steel cans) that are hard to find.

[Enzo]

Does the amp have a make and model? We can be so much more helpful if we have some clue.

RCA didn't make a 48-15, they made 3N3055 and other types LABELLED with OEM part numbers. Just like I could order strings from D'Addario, with Enzo printed on the package.

GE made a general replacement line to compete with ECG and SK and Motorola's HEP lines. I think those GE-14s are from that series, probably replacing a repair to the amp 50 years ago.

yeah, I have a GE guide somewhere too, and a few GE types in my old transistor drawers. If I get to mine before Dude finds his, I'll look it up.

[The Dude]

Found this:

GE-1 ... - Datasheet Search Engine Download

It looks to be a page right out of the GE cross reference book.

NPN
TO3
Max Vce = 100V
Max Ic = 15A
Max Power = 115W
Freq = Audio
Hfe = Not Stated

Nothing too specific, but then it's a pretty "generic" transistor.

[Enzo]

Which pretty much makes it similar to a 2N3055A

[TigerAmps]

OK - I now have the amp in hand! I found a Sound City L210SS solid state prototype:









And that is why I could not provide a schematic.

Ironically I bought it from a guy 3 miles from my house; who bought it at a garage sale. The Gods work in strange ways!
I will post better picture of the guts as I type to figure out what is wrong with it ...

[The Dude]

That looks to be in really good condition! I'm curious to know how it sounds when you get it repaired.

[Enzo]

That pretty much cinches that those GE transistors were not original. No one in the UK would build prototypes from AMerican general replacement transistor lines.