RadioShack 13.8v/3A power supply transistor ID/replacement.

[FlyNN]

Can anyone suggest a replacement transistor? This 13.8v power supply (RadioShack) blew up on me many years ago and I have been dragging it around knowing someday I would repair it. Well, this weekend I finally got around to popping the cover on it. Blown fuse, replaced. Checked main electrolytic capacitor, suprized that it checked OK. Looks like the power transistor is shorted though. Can't seem to find ANY data on a DVE 312 or a cross reference. This power supply seems to have been common with many other brand names. Any suggestions on a replacement for the DVE 312?

[budm]

Re: RadioShack 13.8v/3A power supply transistor ID/replacement.

More likely to be 2N3055 but we need to verify if it is NPN for sure.
Need to see how Emitter and the Collector pins are connected.

[zx8401]

Re: RadioShack 13.8v/3A power supply transistor ID/replacement.

Measure the voltage on the case of the transistor in respect to the black terminal, you should find 18-20 volts on it.

A 2N3055 OR 2N3772 Should do, if the output is too high then check those two transistors on the main board, sometimes they are taken out by the fail of the 2n3055.

[CapLeaker]

Re: RadioShack 13.8v/3A power supply transistor ID/replacement.

measure the voltage on the case of the transistor in respect to the black terminal, you should find 18-20 volts on it.

A 2n3055 or 2n3772 should do, if the output is too high then check those two transistors on the main board, sometimes they are taken out by the fail of the 2n3055.

x2