Transformer help?

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1. I've built two power amp in one casing with two separeted transformers. When I turn on both supply, it produces a loud noise and the IC become overheat. But when I disconnect one of the both supply, it back to normal condition.

2. If I use two transformer like the one I mentioned above, can I connect both 0V together?

Anyone can help this?
Thanks.
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.