Guest " " Posted November 15, 2006 Share Posted November 15, 2006 Do you have transformer hum? Different than ground loop type of humming that you hear thru your speakers.....this is actual humming of the transformers. Here is an intresting device. It's a DC blocker. Basiclly it's used to block DC from getting into the primary winding of a transfomer. The DC get's into your electrical system thru one of your (or neighbor's) devices that has a switcfhing power supply. It only take a few hundred miliamps of DC to cause your transformers to hum. Quote Link to comment Share on other sites More sharing options...
Me Loves Khorns Posted November 16, 2006 Share Posted November 16, 2006 Have you used this device. I am thinking that the hum that I have may be related to this. Paul Quote Link to comment Share on other sites More sharing options...
BiggerIsBetter Posted November 16, 2006 Share Posted November 16, 2006 Very Interesting. I have a transformer hum on my citation 5.1 amp ONLY when the light in my room is in the dimmest of the 3 settings. I can solder and have lots of caps around, but am not exacle sure where those caps/diodes go, can you elaborate/simplify? Quote Link to comment Share on other sites More sharing options...
mas Posted November 16, 2006 Share Posted November 16, 2006 This may or may not help... The transformer hum that I have experienced ovver the years has, when investigated, not actually come from inside the transformer itself, but has been due to vibration at its mount, between it and the chassis. This has been rectified (no pun intended!) by shimming or remounting the transformer more securely. If continuity is required, you might even consider a conductive 'grease'; or where continuity with the chassis was not critical, by placing a thin sheet of neoprene or other gasketing material between the transformer and the chassis. Best of luck... Quote Link to comment Share on other sites More sharing options...
Guest " " Posted November 16, 2006 Share Posted November 16, 2006 Me Loves Khorns I've used something simular in a situation that had 15 switching power supplies aside from the switching power supplies that may have existed on the local step down pole pig. There are comercial version of this called hum busters. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted November 16, 2006 Share Posted November 16, 2006 BiggerIsBetter Best bet would be to put the caps and diodes in a small metal junction box. You can use a single or dual leg point to point solder strip to mount everything. Plug the box into your outlet, and your equipement into the box. Also, light dimmers that use semi-conductors such to alter the sine wave can genrate pulsating DC. Quote Link to comment Share on other sites More sharing options...
djk Posted November 16, 2006 Share Posted November 16, 2006 This is the way Bryston does it, two diode drops from the bridge work better. http://www.diyaudio.com/forums/attachment.php?s=c11e5d89fbf55c070a35fe375ca2dcf9&postid=328821 Quote Link to comment Share on other sites More sharing options...
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