Repairing a hacked up ‘74 Fender Jazz bass. Looking at all the issues, you wonder if it’s worth it to repair a neck like this vs buying a replacement. This luthier can perform wonders but at what cost.
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It could be a bad cable or ground from the mixer to the amp. Try another one first. Is it a ¼” output from the mixer or are you using the RCA out on the mixer to either the aux in or the amp’s input. If an RCA jack is involved, try pinching the ground tighter, then reinsert.
Plug the amp and the mixer into the same power outlet. If not, you may have a ground loop which can cause hum.
Next, break the problem down. You tested your bass into the amp and that works. Test the mixer on it’s own. Plug the bass in, test via the headphone out. Add the mic, try that. Assuming all that works as normal out the headphone jack. Next step is to test the mixer’s main output.
Tried different cables, no change. 1/4 jacks on both ends, mixer main out to amp in. Both plugged into a power strip. Got no headphones, so cant test the mixer separately from the amp.
I'd gotten into the habit of putting the strings I take off into the package of the strings I'm putting on and writing the name of the old ones on the package. It woulda been smart of me to write the date, too.I can still do all the modding myself if I want to. But my instruments are set up just as I like them now, so no more goofing with them outside of changing strings, and even then, I let my string go a few years before changing them out.

I'd gotten into the habit of putting the strings I take off into the package of the strings I'm putting on and writing the name of the old ones on the package. It woulda been smart of me to write the date, too.
I didn't.![]()
It's for sure the mixer. I can plug anything into the amp with any cable I have, with power from the wall or the power strip, and it's clean. Plug the mixer main out into the amp (with no input to the mixer) and at anything but zero volume it sounds like a semi downshifting on Wolf Creek Pass. No rust visible, no looseness found. It's an old piece and hasn't had use OR upkeep, and was cheap to start with...so...Check that the jack nuts at each end are at least finger tight. Look for visible signs of oxidation that could cause a bad ground.
Try not using the power strip, put both AC plugs directly into the same wall socket.
It's for sure the mixer. I can plug anything into the amp with any cable I have, with power from the wall or the power strip, and it's clean. Plug the mixer main out into the amp (with no input to the mixer) and at anything but zero volume it sounds like a semi downshifting on Wolf Creek Pass. No rust visible, no looseness found. It's an old piece and hasn't had use OR upkeep, and was cheap to start with...so...
there's also the fact that I don't actually expect to ever NEED a mixer again.
Some strings start out slathered with intestinal contents.
Cat gut is still used today. Violins and other instruments, including bass, were traditionally strung with cat gut strings. Some professional musicians insist on using the traditional cat gut. It’s stronger than the equivalent weight of steel. It was used for tennis rackets. Snowshoes used other gut material. Surgeons sewed people up with gut, eventually it dissolves in the body.
The video says sheep gut, but cat gut is still used.
Yup.I couldn’t handle that may beagles at once.
Will this be on the test?
I was gonna say 40....hmmm. Back to the books.If there is, the answer is 42.
Gut strings are the harmonically rich tonal equivalent of a tube amp.