OT: Stereo Transformer

LonM · Feb 7, 2012

I have a magnavox stereo with a billion 54-25P transformer that I think is bad (voltage in, none coming out). Does anyone have any experience or advice for finding a replacement part? Thanks for any help.
LonM

Chris(WA) · Feb 7, 2012

Have you tried Mouser Electronics? I bet they will have something if you have the spec's of the old trans.
Mouser

LonM · Feb 7, 2012

Thanks for the suggestion but they did not have anything to match what I need. The stereo will run on batteries, so maybe that is how it will be from now on.
Thanks again,
LonM

Janicholson · Feb 7, 2012

If you can find the voltage rating, and turns ratio 9or Vin Vout) a substitution is pretty easy. If it has more than one output, it is tougher.
Another option is to solder in leads to the battery compartment, and put a charger on it with Nicads in place of the one way cells. Jim

barnE · Feb 7, 2012

Build a battery eliminator power supply. Piece of cake for a good technician. Built several years ago for 90 volts dc. Only needed rectifier and 4 resistors. Half wave dc. Maybe filter capacitor. Good luck.

barnE · Feb 7, 2012

Build a battery eliminator power supply. Piece of cake for a good technician. Built several years ago for 90 volts dc. Only needed rectifier and 4 resistors. Half wave dc. Maybe filter capacitor. Good luck.
Ham radio operator could help you too.

RayP(MI) · Feb 7, 2012

Probably has a heat-sensing fuse just under the tape over the windings. Check primary with a ohm meter. Secondary too for that matter. Probably just a fuse.

Geo-TH,In · Feb 8, 2012

When I was young and folish and had good eye sight, I would take the transformer apart and look for the wire that usually burned off the big wire connected to either the primary or secondary wires. I would carefully unwrap one coil, use a match to burn off the insulation on the wire and then solder it back to input wire or output wire.

To find a replacement transformer is next to impossible. Most transformers have multiple secondaries, some are tapped too. No way of knowing what the voltages are either. No way of knowing if a filter capacitor is shorted and caused your problem in the first place.

You may want to take the insides out of the old sterio and store something inside it. Make a beer cooler or something. Install a different sterio. LOL

George

LonM · Feb 8, 2012

Thanks for all the suggestions- the cooler idea sounds about the most simple to convert to

Since I like to dig around in machinery, I'll take apart the transformer and learn about it, and then try to create an alternative to it or buy a whole bunch of batteries.
I always enjoy reading on this site- so many good minds willing to share ideas!
Thanks,
LonM

OT: Stereo Transformer

LonM

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Chris(WA)

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LonM

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Janicholson

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barnE

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RayP(MI)

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Geo-TH,In

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