okgb
Well-known member
I'll start another thread if anyone thinks that better , but I have a grounding issue as well
A friend bought a soldano sp77 guitar preamp [ made in japan version ] that has a ground type hum
bought it used this way , hum rises with master volume mostly independent of gain control , way too much
to be normal , I separated the psu and signal ground point from the pcb and that helped , it is a.c. 6v c.t. filaments
soldano's answer was to send it in and no one on that newsgroup had any answers , could it be a problem with
the xfmr ? any help is appreciated , hopefully an easy solvable [ even if stupid ] problem .
tia regards Greg
A friend bought a soldano sp77 guitar preamp [ made in japan version ] that has a ground type hum
bought it used this way , hum rises with master volume mostly independent of gain control , way too much
to be normal , I separated the psu and signal ground point from the pcb and that helped , it is a.c. 6v c.t. filaments
soldano's answer was to send it in and no one on that newsgroup had any answers , could it be a problem with
the xfmr ? any help is appreciated , hopefully an easy solvable [ even if stupid ] problem .
tia regards Greg