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Noise unless I touch audio jack
Noise unless I touch audio jack
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Old 15th April 2012, 04:05 PM   #21
Alvis is offline Alvis
Join Date: Apr 2012
Yes. A "coupling" capacitor.
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Old 15th April 2012, 06:12 PM   #22
DF96 is offline DF96  England
diyAudio Member
Join Date: May 2007
A coupling capacitor does not present HF capacitance, but only at LF where it doesn't matter for this problem. Cable capacitance will do it, an RF filter, or any Miller capacitance from the first stage.
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Old 23rd April 2012, 06:51 AM   #23
gmphadte is offline gmphadte  India
diyAudio Member
Join Date: Jul 2003
Location: Dona paula, Goa
If the shield of a cable is connected for the ground return on both the ends, u will get hum.

Gajanan Phadte
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