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Singing Leach amp while burning in
Singing Leach amp while burning in
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Old 24th May 2006, 11:55 AM   #11
PMA is offline PMA  Europe
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Singing Leach amp while burning in
Quote:
Originally posted by Eva
Capacitors aren't.
You might be surprised. Try it, though I believe you have already tried.

Put a wound PP or PE capacitor as for stability test at amp speaker terminals and wobble sine tones at high output voltage level, or squares. I am sure that you will hear cap sing for some types.
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Old 24th May 2006, 11:01 PM   #12
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You're right, high value wound foil film capacitors may produce sound when subject to strong voltage swings or overvoltage, but that's not a condition likely to happen in a class AB amplifier. Note that I'm currently working into high power class D and using that kind of capacitors for output filters, but the inductors and even the heatsink insulators produce far more sound...
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Old 25th May 2006, 03:42 AM   #13
TonyTecson is offline TonyTecson  Philippines
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Singing Leach amp while burning in
funny, my dummy loads are in a tub of watter, only bubbles can be heard when the water starts to boil...
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Old 25th May 2006, 07:20 AM   #14
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Singing Leach amp while burning in
Quote:
Originally posted by Eva
Note that I'm currently working into high power class D and using that kind of capacitors for output filters, but the inductors and even the heatsink insulators produce far more sound...
I know you are, and I appreciate yourk work in the field of switched power supplies and class D amplifiers.
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