neepheid

But it doesn't feed back at "war" volume when there's no OD...

Loud enough to be heard over a drummer and a guitarist - Mark bass Mini CMD 121P IV (250W, 1x12"), gain set so it's just tickling the clip light, master volume probably around half. Room is large-ish - I don't have measurements to hand but it's very roughly 1.5 of my house's living room.

One thing I would also really like is to A/B with another Jack Casady to see if the problem applies to all JCs or if it's just mine. Dunno if anyone local to me has one that they wouldn't mind me borrowing - for science!

I'll put it on my list to try. Need to go some place I can be noisy - a terraced house is not the place to be making super obnoxious feedback noises at war (gig) volume...

bass > Boss TU-2 > Hotone Harmony pitch shifter/harmonizer/detuner > Yamaha CO-10MII compressor > Joyo Monomyth > amp Powered by a T-Rex Fuel Tank Jr.

Bass > Pedalboard > amp input Try the pedalboard in the effects loop instead, for a test?

There's the OD section of the Behringer BDI21 I guess I could test with. What puzzles me is that this is only affecting the Jack Casady.

Well, that was a lot of pricking about to achieve not much. I tried removing the pickup, stringing it back up and then holding the pickup above the strings. No feedback. I tried putting a rudimentary copper shield between the coil and the pickup (more like a curtain really) but that did naff all - put it all back together again and back to feeding back with OD engaged. It only happens when the amp gets involved - it doesn't happen through headphones straight out of the Monomyth. I don't know what that means. I think my next test would be to jump the pickup out of the circuit and wire it directly to a jack socket, see if that makes a difference. Or am I barking up the wrong tree?

Thanks Paul, if the dates work out then I'd like to take you up on that!

Would consider another epic road trip from the frozen outpost of civilisation if the date doesn't clash with gigs etc.

Well, it's not supposed to happen, I can't imagine they put my coil in a special place versus all the other Jack Casady basses out there so perhaps my coil has gone bad in some nebulous way. I wonder if some sort of shielding between the pickup and the coil might mollify it (although I'm pretty sure that's what the metal case that the coil is placed inside and potted/epoxied into place is for). The other test would be to move the pickup out of the way (but still near a string) and then plug it in. I'll be back...

Here it is - lives right next to it

It's been annoying me for a while, I first noticed it with my old OD pedal (TC Electronic Mojomojo) where it had two levels of OD and the JC would get angry with the higher level of OD. These days I use a Joyo Monomyth and I think the JC hates this one more. I suspect I'm going to have to gut the JC and check all the wiring. Life is pain.

Does anyone in Aberdeen city or shire have a Jack Casady and if so, would they be willing to help me out with an A/B test? Can pay in tea and biscuits!

Sounds like you're set on going upmarket but I'll share my story anyway - I had an Epiphone Embassy that was so light, I sold it. Don't get me wrong, it sounded great but it was too light - my brain couldn't take it seriously, it felt like a toy - which sounds ideal for your requirements.

Well don't effing buy it then. Problem solved.

I need a bit of hive mind on this headscratcher. My Epi Jack Casady is havnig weird problems. It works fine played normally, but as soon as I engage my overdrive, it feeds back like a mofo. Normally, one needs to be pretty close to the amp to induce feedback and it's a slow build. This is happening when I'm nowhere near my amp. I was doing some checking tonight and I found that the transformer/coil was not securely fastened to the body inside the bass. I tightened up the screw so it's all solid again but that wasn't it. But during further testing, I was finding that with the volume on the bass turned all the way down, there was nothing coming out of the amp if no effects engaged. But when I turned on my OD, I got output through the amp! Also my harmoniser pedal was able to find a faint something to work with when engaged even when the volume is turned all the way down. It's also noisy, and the compressor makes the background hiss worse. I'm not having any issues with any of my other basses so I'm disinclined to blame anything on my pedalboard. Ground appears to be connected because touching the bridge or the position indicators on the pots lessens the background noise. I'm stumped - WTF is going on?

Utterly boggin'

Wood be woody, there's no way this is universally true.

FYI - looks like the bass you bought is still a live ad on Facebook.

Not all basses use the same sized allen key, and some are metric and some are imperial. Did the bass come with a key? Someone with more Fender knowledge will be along shortly but in order to help you get the right key, you'll need to let us know what bass it is, where it was made and what year it is. It's possible that the socket is stripped, I hope that's not the case, hopefully it's just a case of using the wrong sized key.

Heh, I like those knobs - very space-age, like 50s style space-age. I dig.

One rig. Mrs. Neepheid is very tolerant of my hobby, but there are limits. If my rig goes wrong, there's a feed from my pedalboard to the PA.

It means whatever you think it means