Troubleshooting an humming WOPL : need help!

[Coldsmoke]

What outputs are in this amp??

What do you mean (again sorry)

 

[orange]

Which output transistors/diodes are in this model, I believe he's asking...what's on the heatsink?

 

[kevin]

The quarter size silver round things on the back of the amp !!!! LOL...

 

[laatsch55]

Thankls for having my back guys!! That's what I was asking....yes..

 

[Coldsmoke]

Thankls for having my back guys!! That's what I was asking....yes..

Sorry again... I'm also learning your wording guys It took me a good minute to understand what you name "trannies"
So, these are MJ21196G, they look like new

 

[laatsch55]

Got the good ones...

 

[fitz43]

I don't advise putting these in place because of increased power supply cap values, but rather to cut down.on the switching noise if the diodes within the bridge rectifiers. One cap between each two post combination on the BR. 4 total...

What specs are on the Bridge Rectifier?

 

[laatsch55]

35 or 50 amp ...

 

[NavLinear]

What specs are on the Bridge Rectifier?

Here's a bridge rectifier specification sheet.

 

[fitz43]

Here's a bridge rectifier specification sheet.

Thanks.

Quite the difference in price between Mouser (28.09) and DigiKey (13.78)

 

[Coldsmoke]

Hello there,

I come back after a few months in a professional trip, I had a an of extra questions for you guys :

I just got some snubber caps from mouser and, while I was opening the amp to solder them I just realised something that seems very strange to me : I think the earth wire form the cord (wich is cut at the other side as my plug is two-pronged) is connected to what I guess is the thermal cutout of the transfomer ...
Can you give me you POV on this ???

Thanking you a lot in advance,

 

[laatsch55]

Need some pics. And what is" cut on the other side"?

 

[laatsch55]

I see your pic now. Have to wait till I get home and see it on the big computer..

 

[Coldsmoke]

I mean I have no earth pronge.

 

[laatsch55]

That's a good thing with the PL. You don't want earth ground.

 

[Gepetto]

Hello there,

I come back after a few months in a professional trip, I had a an of extra questions for you guys :

I just got some snubber caps from mouser and, while I was opening the amp to solder them I just realised something that seems very strange to me : I think the earth wire form the cord (wich is cut at the other side as my plug is two-pronged) is connected to what I guess is the thermal cutout of the transfomer ...
Can you give me you POV on this ???

Thanking you a lot in advance,

View attachment 19128

We need a couple of good photos of the right side of your chassis wiring as well.

 

[Coldsmoke]

We need a couple of good photos of the right side of your chassis wiring as well.

Here you go, I hope the quality is good enough.

 

[laatsch55]

There's only 2 wires coming into the amp from the power cord correct?

 

[Coldsmoke]

Nope,
This is precisely my point :

There are actually 3 wires :

One (the black one on the pic), comming frome one pronge, is connected to the left upper fuse
The other (green on the pic), comming from the second pronge is connected : see red circle behind
The last one (white in a brown sleeve) wich pronge is cut is connected to the transformer through what I think is the thermal protection see first pic below

 

[Coldsmoke]

There's only 2 wires coming into the amp from the power cord correct?

Here's a closer view of the power cord entrance, you can notice the white wire in the brown sleeve