Pot value for JE-1500 mid-sweep?

[Flanging_Fred]

Hi

I need to replace the tone pot on my Charvel Spectrum. Does anyone know the type of pot required to replace it? It's attached to the JE-1500 Mid Sweep/Wah pre-amp thingy I've looked at the pot but can't see a value on it. I tried to measure it with a multimeter but can't for some reason get a reading. And I can't find a schematic for the JE-1500 pre-amp on the web.

I also note that it has 6 lugs on it, is this significant? Well here's the tricky little fella



So is this pot like the JE-1200 pre-amp ? A 50k linear pot?

any help much appreciated.

[dg]

That is a push-pull pot. It works as a regular tone pot in one position and as your active mid sweep in the other position. I just searched, and I can't find the value anywhere. Hopefully someone here will know. My guess is that it may be a standard audio-taper 250k push-pull rather than a 50k pot. The JE-1200 uses a 250k tone pot even though the other 2 pots are 50k in that circuit, so that's why I'm leaning that way.

[Flanging_Fred]

Thanks for the input dg. Unfortunately it is NOT a push/pull pot. The mid sweep is activated by a mini toggle switch on the guitar. I've had another crack at measuring it with the multimeter. For some reason , this time I managed to get a better reading and it does look like a 50k pot. I think what we have here is a 50k dual gang pot although I've not no idea if it is a linear or audio taper pot. Now the difficult part is trying to find a replacement! If I manage to sort this out I'll be sure to post my results as I'm sure this would be useful info. for others with the JE-1500.

[dg]

Sorry about giving you the wrong info! The places I just checked call that a blend pot or blend control. GPD has 25k linear & audio blend pots. I'm not seeing any at 50k, but there has to be a source.

http://www.gpdusa.com/Electronics-Potentiometers.html

You may want to try posting this question in the tech section, since the JE-1500 was used more often on Jackson Fusions than on import Charvels. Some of the guys never look in this section, and they may know exactly what you need

[DonP]

I'm afraid that might be a tough pot to source. I think it's a 250K or 500K audio passive (when the JE1500 is off) and a 50K linear when turned on.

Just an FYI, you are not going to get a correct reading when it is in circuit. You need to de-solder it, then read the outer lugs on both pots for the total value, the set the pot to the mid-point. If you get a reading of 1/2 the total value measuring center lug to outer, you have a linear pot. If it's other than 1/2 the total value, it's audio.