transformer isolation - Page 3

dmitriy167 · 28th February 2005, 07:33 PM

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

405man · 28th February 2005, 07:46 PM

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

Toroidal Transformer Construction

Stuart

dmitriy167 · 28th February 2005, 08:31 PM

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

EchoWars · 1st March 2005, 10:02 PM

Quote:

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 · 2nd March 2005, 03:01 AM

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.

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28th February 2005, 07:33 PM	#21
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	Thanks guys-- I'll try more shielding/positioning tonight and reply with the results. And yes, I love the avatar-good tubes.

28th February 2005, 07:46 PM	#22
405man diyAudio Member Join Date: Dec 2003 Location: Near Glasgow Scotland	If you have a look here you will see how the transformers are wound without a split core Toroidal Transformer Construction Stuart

28th February 2005, 08:31 PM	#23
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	Hmmm (no pun intended), I wonder why my trafo generates so much EMI then; I know it's wound very tightly.

2nd March 2005, 03:01 AM	#25
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	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.

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