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Identification of blown marine radio power supply transistor

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highcap:
Hey all, I'm glad to be part of the forum!

I have two shorted transistors (emitter and collector) on a marine radio dc dc converter, that probably setps up voltage from the 12v input.

The problem is markings are washed off, so I don't know what transistors to place in.

If someone can give some hint or a general-use transistor that would be of great help, as I will greatly enjoy to see this old device working.

Thank you!

Kim Christensen:
Make and model # of the unit would help. Maybe there's a manual out there.
The other thing to do would be to trace out the circuit, and knowing the power requirements, make an educated guess.

highcap:
It was the first thing I tried, searching by the model to find the schematics, sadly didn't end up with anything.

International Marine Radio Company Limited - ENGLAND
Type: RALU

Tracing out a circuit is out of my expertise sadly...

Andy Watson:
To me, the power supply appears to have been a home-made contruction. Is it part of the radio set, or is a unit that "somebody" has cobbled together? I think  your only option here will be to trace-out the circuit and find the power-requirements of the radio.

Benta:

--- Quote from: Andy Watson on June 01, 2023, 10:18:32 pm ---To me, the power supply appears to have been a home-made contruction.

--- End quote ---
I agree.
Either DIY or "British automotive standard".

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