Been modifying a Conrad Johnson pv3 preamp. I put in new line capacitors, stepper volume control, star ground, grid chokes, power supply regulator. Everything was going wonderfully till i put in the new regulator. At first there was a hum, i managed to add a ground wire and fix it, then it came back, and i did something else that stopped it for a while, then it came back and nothing i could do stopped it. Now it is much louder than any music signal. It hums like crazy with the volume down, inputs connected or not.
anybody have any ideas about what can be done to save this preamp?
anybody have any ideas about what can be done to save this preamp?