P prorms Member Joined 2006 2008-09-25 4:16 am #1 2008-09-25 4:16 am #1 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 Attachments untitled.jpg 26.5 KB · Views: 79
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
