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sorry for my absence i worked hard on this ampli for reduce all noise made by 50hz. I have shielded power circuit in an alluminium box.
I noticed that in this way the 50hz humm goes away. but i have the noise made by heaters, in fact if i use dc power thise buzz disappears.
Now the noise is very low and i can't listen it at medium volume, but at low volume is still present.
I would to give a DC power but my transformer is 6,6Vac and i think i can't give much voltage as i want.
I noticed that in this way the 50hz humm goes away. but i have the noise made by heaters, in fact if i use dc power thise buzz disappears.
Now the noise is very low and i can't listen it at medium volume, but at low volume is still present.
I would to give a DC power but my transformer is 6,6Vac and i think i can't give much voltage as i want.
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