Humming Noise in my amplifier???

[claudio1889]

So what i am doing for clear loop problem ?

 

[claudio1889]

so what i am doing to solve loop problem ?

 

[AndrewT]

Read D.Joffe and about the HBRR & HBRL solution.

 

[claudio1889]

humming noice

Dear when i connect another transformer there is no humming noice coming . please help me if i want to connect one transfomer then what i do .

 

[AndrewT]

You have a loop in the signal return via the two power grounds

Read D.Joffe and about the HBRR & HBRL solution.

Dear when i connect another transformer there is no humming noice coming . please help me if i want to connect one transfomer then what i do .

you have broken the loop. The interference current stops. The noise goes away.
Read D.Joffe.

 

[claudio1889]

Dear if i want using one transformer then how to wiring without any loop ?

 

[Audio1Man]

Brake the Pre-amp common PS lead and connect it to the COMM Power Amplifier PS input. This should remove the current loop ground.
Duke

 

[claudio1889]

Thank you dear friend . now i am happy thanks once again .

 

[AndrewT]

Brake the Pre-amp common PS lead and connect it to the COMM Power Amplifier PS input. This should remove the current loop ground.
Duke

No, maintain the three wire power connection from small PSU to pre-amp.
Maintain the three wire power connection from big PSU to power amplifier.

Increase the impedance, using the HBRR & HBRL added resistance, to reduce the interference current.