[sdiy] Help needed identifying power transistor

Glen mclilith at ezwv.com
Tue Jan 8 02:26:12 CET 2002


At 06:02 PM 1/7/02 , Brett, Bill wrote:
>Greetings,
>I am repairing an organ and an output power transistor in a TO-3 package has
>failed. The package is marked with a Motorola symbol followed by 062-00-D
>and then 7939. I am assuming that the 7939 is the date code. Does anybody
>know what this device is or what is a modern replacement? Specifically, NPN
>or PNP? Or how about an online resource for looking up a modern replacement!
>-Thanks
>-Bill 

It would have helped if you had mentioned the brand of organ you are working
on. If you are working on a Kimball organ, then this might possibly be a
Kimball 540-062-00 transistor. If so, the generic number is 2N3055, and it's an
NPN transistor. If you are working on some brand other than Kimball, then I
have no idea what your transistor might be, unless you can give more
information, such as brand and model number, etc.

With the small amount of information you gave, there is no way to be sure of
much of anything.


Later,
Glen



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