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In Reply to: RE: Class D Audio modules noisy when bridged to mono posted by islandmandan on April 18, 2017 at 10:48:38
I have cut back on technical posts because the PTB think I don't know what I am doing, though I have been repairing, designing and building for forty years.
Most likely the oscillators in the two units are close in frequency but not locked. The optimum solution should this be the case would be a simple cap between certain circuit points in each to make the oscillators sync. You would need a print, or at least the spec sheets on the chips that run them. If totally discrete component and no print you have to do reverse engineering. That is a big PITA on modern equipment. I used to be quite good at it but between my eyesight and multi layer boards them days are pretty much over. You have to scope everything out now and sometimes kinda guess.
If you can post up the print for these amps I can probably tell you the modification to do to fix this.
Follow Ups:
Jurb, this is what I could find re my amp. It may not be of any use but it's all I could find.
Thanks,
Dan
Jurb, here's what I could find about my amp, I'll try to get it posted.
Thanks,
Dan
Jurb (A), I appreciate your response to this, I thought my post was long forgotten, with no response.
I will see what I can find on Class D Audio's site, and post it if it seems pertinent. Thanks, Dan
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