| | Ground Hum Trouble Shootin Help Please
I've dusted off my Bass Rig after a few years on the shelf.
Ampeg B2R into Hartke 410 & 115.
Got a major ground hum whenever I'm not touching the strings.
Also disappears when I place hands on the Ampeg Head or the jack.
Can I rule out the instrument???
Major hum disappears when I touch the strings on my 70s P. It's fine in a mates practice amp.
My electrice guitar is also humming when plugged in, and hum disappears when I touch the strings.
Input jack is a little scratchy at times - ie squeeks and squarks if I twist the cable.
I've used different instrument leads - the same issues regardless of lead.
Scratchy jack a good starting place?
SHould I try a different power cable?
All advice appreciated.