|Chip Amps Amplifiers based on integrated circuits|
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|28th January 2012, 03:35 AM||#1|
Join Date: May 2004
I can't win this noise.
LM 3886 typical circuit. plus optional components in datasheet.
some day the noise come from electric motors from AC line.
in 9.30 AM some day about 10 min and it gone.
There are many industries or wood crafting around here.
I try every thing.
Japanese AC line noise filter
small c input to ground
small c input+ , - of the ic.
event I turn volume to ground it still noise.
volume is ALPS made in Japan.
I attach the noise I record from speaker. up volume 300%.
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