preamp 60 cycle hum help?? tube opamp

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preamp 60 cycle hum help?? tube opamp

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25th September 2008, 03:16 AM

prorms

diyAudio Member

Join Date: Nov 2006

preamp 60 cycle hum help?? tube opamp

preamp 60 cycle hum help??

the hum only starts at the end of the circuit at r9 my guess
cause the tube being amplified the tube
i try change the opamp will not work

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