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Short circuit connecting preamp with amp (RCA)

do you have a safety capacitor or 2 lying around ?
Safety-Capacitor-X1-Y1-.jpg
 
Peter do you think that the problem could be the Filter caps? I changed all the electrolitic caps, and tantalum already.

One filter cap look ugly ...
 
elgrillo said:
BTW all this mesurements are from a power bar conected to the wall outlet.
If this is important?
Click to expand...
ok ..power bar or wall outlet are reversed live neutral ..or you have live neutral confused .

i am thinking of trying a safety cap from chassis to centre tap primary (white / white-black connection) a y2 cap should be the correct one .
 
petehall347 said:
ok ..power bar or wall outlet are reversed live neutral ..or you have live neutral confused .

i am thinking of trying a safety cap from chassis to centre tap primary (white / white-black connection) a y2 cap should be the correct one .
Click to expand...

Looking at the socket. With the ground down. Neutral is at the left side . And hot or live is at the right side?
 
i am not familiar with your sockets ..what are they like ? can you post a pic ?
our sockets have earth to the top live on the right .
 
its ok i looked it up and your socket looks wired correctly .. its upside down though .. apparently they can be fitted any way up ...
the live should go to the fuse in the amp .
 
The sockets are like this.

So what do you suggest?

The AC leak you think could be from the contact of the trafo and the chassis?
Or i could be grounding something wrong from a board to the chassis?

Im going crazy with this:scratch2:

Thanks for the help!
 

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check resistance (ohms) chassis to all primary transformer wires one at a time .. amp unplugged of course . then same with secondary side ...
then from primary to secondary .
primary is in secondary is out in case you don't understand .
 
elgrillo said:
The sockets are like this.

So what do you suggest?

The AC leak you think could be from the contact of the trafo and the chassis?
Or i could be grounding something wrong from a board to the chassis?

Im going crazy with this:scratch2:

Thanks for the help!
Click to expand...

live neutral is actually the other way round and is correctly wired

its leaking somehow but might not have any current behind it .
you could try and take the transformer fixings out and isolate transformer from chassis and see if it stops the leak .

i am thinking the safety cap idea should hopefully zero the voltage out .

do you have pictures of transformer area ?
 
Last edited:
petehall347 said:
check resistance (ohms) chassis to all primary transformer wires one at a time .. amp unplugged of course . then same with secondary side ...
then from primary to secondary .
primary is in secondary is out in case you don't understand .
Click to expand...

Ok I will do this tomorrow morning and post the findings as soon as i get the readings.

If i dont go to bed now... my wife is going to kill me...

Thank you very much for your time.

Gonzalo.
 
petehall347 said:
check resistance (ohms) chassis to all primary transformer wires one at a time .. amp unplugged of course . then same with secondary side ...
then from primary to secondary .
primary is in secondary is out in case you don't understand .
Click to expand...

Pk Peter I made the mesurements in the primary and secondary.

Primary:

Black/White : OL
White : OL
Black : OL
Black/Red : OL

Secondary:

Brown 1: 0.4
Brown 2: 0.4

White Brown : I didnt take the readings.
 
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