hello everyone, ive had this panasonic RA-6600 receiver with 8 track player for some years which belonged to my day but the transformer got damaged in a power surge.
can anyone assist me in being able to determine the values of the transformer so i can replace it and bring it back to its former glory? my dad passed away a while back and id like to have it working in his memory.... thank you all in advance

 

Welcome to AAC!

What makes you think that the transformer got damaged in a power surge?
Transformers are very robust things. Are you sure that the problem is not someplace other than the transformer?

 

Tested everything else and left that for last, i got power up to the primary and nothing on the secondary. Someone changed the transformer and the unit was working but the replacement seem too weak, everytime the bass hits it "pulls down". You are right though, transformers are very robust but probably it served its time

 

You need to search for the service manual.

 

Do you have the original transformer? Pictures would help us. Perhaps the original could be rewound. I looked but could not find a service manual in all the usual places...

 

If you know the output voltage/voltages of the secondaries, it would be easy to find a substitute. Or you can replace it with a switching PSU.

 

Buy a few units on ebay for parts.

 

If you know the output voltage/voltages of the secondaries, it would be easy to find a substitute. Or you can replace it with a switching PSU.

thats the thing, i dont know the values of the secondaries and here in trinidad parts for items like these are like searching for black pepper in sand

 

The only thing I can tell you is that the transformer is a Panasonic (Matsushita) SLT5M60-W.
Nothing else to find about it on the internet.

 

@Lonramsingh Here's a schematic of a transformer I took out of an old stereo. It had an STK4192 amplifier chip in it. I have it in my cabinet for if ever I need any of these voltages. I'm going to guess yours is probably similar in voltages. Depending on your power, these values will possibly change.

 

@Lonramsingh Here's a schematic of a transformer I took out of an old stereo. It had an STK4192 amplifier chip in it. I have it in my cabinet for if ever I need any of these voltages. I'm going to guess yours is probably similar in voltages. Depending on your power, these values will possibly change.

View attachment 169305

Probably the 65 volt winding is the high current one for the output stages and the 24 volt one provides power for the rest of the electronics and the tape drive. And the 5.1 volts would be for the lights.

 

@MisterBill2 Yes, the 65 V was the heaviest gauge wire in the transformer. It was rectified and then sent to the amplifier board with the two large capacitors. There is a microprocessor on the main board as well. My guess is that the 5 volts also powered that.

 

Tested everything else and left that for last, i got power up to the primary and nothing on the secondary. Someone changed the transformer and the unit was working but the replacement seem too weak, everytime the bass hits it "pulls down". You are right though, transformers are very robust but probably it served its time

Looking at the schematic I posted (not necessarily similar to yours) you notice that the 32 volt and the 5 volt outputs are isolated from the main output.

Can you post a picture of your transformer?

Side note: The illustration I posted is one I made by measuring the outputs. Other transformers I have somewhere have provisions for 120 AND 240 inputs, so you may actually have a center tapped primary transformer (not shown in illustration).