Sjöström Audio DIY forum

No...

Do 330 ohms impact anything else besides the gain?

Hi,

Thanks for the tip.

I did not think that the AGND have no mass !!!

Are the sense inputs connected? Have you tin drops on J1-4?

Hi,

SSR03 board with OP, the rest soldered itself.
Plus volts 13.4V, minus volts 10.4V.
OP From PIN6 + V -6.5V
OP from -V + 3.5V.

All components checked twice.
Maybe components defective?

Please help!! :-(

Hi,
E29 is fine. Have a look at a thermal photo of the amp. Does it look fine?

What can I measure to confirm that it is working properly now, amd how do I adjust the pots correctly?

Thank you again, it would have been really great to get this amp working properly.

Ok, it could be something close to it that is heating up, but I will have a look.

R29 should be 470 kohm. Impossible to get it heated for any value more or less. Check the resistance and the voltage across it.

With new rectifiers, the psu seems ok. I soldered the amp section in, and it does not shut down like before. It makes a mechanical 50hz humming sound, and e29 lights up with the thermal camera.

What should I measure next to make sure it is ok? I sort of assume that this is a temporary thing until the new rectifiers brake down.

Switch over to "diode" on your DVM and measure the diodes in the rectifier bridges. If you read near zero, the you probably have broken diodes => change the parts.