Aleph transformer noise.

[adason]

Yes, i know that conditions are different, i just want to eliminate the problems step by step.
Some time ago i owned Musical Fidelity Nu-Vista integrated amplifier with separate power supply. There were only transformers in that enclosure.
Anyway, adding 40000uF of capacitance after diodes unfortunately didn't make any difference. 🙁

when humming, use longer wires, and lift if from the case and see if hum goes away...and back if hum returns

have you rotated the toroid in place?

 

[a007udio]

The cause of the noise was one of the diode bridge rectifier. After replacement it was almost silent. I additionally lift the tansformers with rubber for about two centimeters and it's ok now.

Thank you for all your suggestions.

 

[Zen Mod]

welcome to the Club (of these not applying simple methodology) - first thing is to check all components for function, before cry for help

recently my SissySIT blow mains fuse in one channel - reason - Dodo diode in one (of four) metal case Graetz bridge

Why it gone Dodo - 35A, brand name, Iq in range of 1A8 ............ ?

Puzzle - just replaced all 4 .......