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Class D Switching Power Amplifiers and Power D/A conversion

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Old 26th October 2006, 10:31 PM   #21
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thats exactly what i had in mind! exepct for the "Vishay-Roedenstein" caps, what are those? could you please tell me what size caps you used?

I thought about using a Zener String, or some power Zeners, but the amount of power that would have to be dissipated over those Zeners would be increadable (10v at close to 10a), which gives 100watts over a Zener string, which is alot!
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Old 27th October 2006, 01:29 AM   #22
heady is offline heady  Singapore
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Quote:
Originally posted by alexmoose
thats exactly what i had in mind! exepct for the "Vishay-Roedenstein" caps, what are those? could you please tell me what size caps you used?
Vishay-Roedenstein 0.01uF cap

http://sg.farnell.com/jsp/endecaSear...sp?SKU=3038543


I read about this tweak in a review of various audiophile polypropylene caps but I can't find that review again. Sorry.
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Old 27th October 2006, 07:06 AM   #23
niiico is offline niiico  France
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Here :

http://www.humblehomemadehifi.com/Cap.html

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Old 27th October 2006, 04:35 PM   #24
heady is offline heady  Singapore
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Quote:
Originally posted by niiico
Here :

http://www.humblehomemadehifi.com/Cap.html

Ah... Yes. That's the one. Thanks.
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Old 29th October 2006, 11:03 PM   #25
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another question, any theories/ideas as to wat kind of potentiometer I should use? 100k? 10k? I have no clue
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Old 30th October 2006, 09:59 AM   #26
heady is offline heady  Singapore
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Quote:
Originally posted by alexmoose
another question, any theories/ideas as to wat kind of potentiometer I should use? 100k? 10k? I have no clue
I used a 50K Alps pot during the testing phase of my amp5 and it worked fine. I cased my amp5 as a power amp fed by a preamp, so a pot is not required.

I have no idea or theories of what value is best. The 50K Ohm pot is what I have wired up as a test rig to test all the amps during the built phase.
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Old 30th October 2006, 11:27 PM   #27
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Lower value pot, lower noise but a more difficult load.

Use 10k if your source can handle it.
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