My completly-HUM Free LM4780 setup - diyAudio
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Old 12th December 2010, 11:41 AM   #1
lykkedk is offline lykkedk  Denmark
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Join Date: Dec 2002
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Wink My completly-HUM Free LM4780 setup

Hi.

I would just contribute, with (after long time stroggling) - Well at least in my setup... a completly HUM Free setup / connections !

After trying a lot of setup's including PWR-stargnd / linein-stargnd... and all those trick's, i finally found that the HUM, was comming from my twistedpair RCA inputs.

Well, i tried using shielded cable, and Humming suddently stopped, now it was only very low. When disconnecting one- end of the shield at the RCA side, all humming is gone now I think it might be due to a little gnd-loop ind the shield of the cable.

Well take a look at my picture.

Jesper.
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