transformer isolation

[dmitriy167]

Thanks guys-- I'll try more shielding/positioning tonight and reply with the results. And yes, I love the avatar-good tubes.

 

[405man]

If you have a look here you will see how the transformers are wound without a split core

http://www.diyaudio.com/forums/showthread.php?s=&threadid=45938

Stuart

 

[dmitriy167]

Hmmm (no pun intended), I wonder why my trafo generates so much EMI then; I know it's wound very tightly.

 

[EchoWars]

It might be grounding problem more than RFI.

Nope...otherwise moving the transformer away from the driver boards wouldn't help. This is EMI.

 

[dmitriy167]

More isolation on the inputs seems to help a little. Also, my tube preamp makes some noise of its own, and the trafo EMI and the preamp noise seem to cancel each other out! I increase the volume of the preamp, and the total noise is reduced. Very weird.