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Class D Switching Power Amplifiers and Power D/A conversion

buzzing sound with  Skynet 8080 SMPS
buzzing sound with  Skynet 8080 SMPS
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Old 24th June 2006, 05:32 PM   #1
PIERRICK is offline PIERRICK  France
diyAudio Member
Join Date: Feb 2006
Location: huttenheim
Default buzzing sound with Skynet 8080 SMPS

I've just got a Skynet 8080 SMPS to power up my T-Amp.
I've made all the connections described on http://myweb.tiscali.co.uk/nuukspot/decdun/gainclonesmps.html#smpsreview but I get a buzzing sound wich decreases when I disconnect Earth on the supply.
It seems as if the switching mode gets to the signal
It totally disappears with my regulated supply.
Another strange things happens when I use a 10 ohms load as described: the 12v supply goes up to 13.2V.
Thank you for any advice
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