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Replacement tone and volume pots for an American Professional Jag
Joined: Nov 21, 2012 Posts: 151 Montreal 
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Posted on Jun 28 2022 11:02 PM
Hey all - I'm looking to replace the tone and volume pots in my American Professional Jag. I'd like to move up to the 1meg pots but don't know which parts to use. Any help/suggestions? —The Men in Gray Suits (Montreal, Canada) |
Joined: Aug 18, 2008 Posts: 373 Orange, CA 
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Posted on Jun 29 2022 04:57 AM
Emerson 1 meg pots are excellent. Their values are usually spot on or very close. |
Joined: Aug 29, 2019 Posts: 19 |
Posted on Jun 29 2022 10:34 AM
Emerson pots are really good |
Joined: Nov 08, 2017 Posts: 369 San Francisco Bay Area
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Posted on Jun 29 2022 10:53 AM
Don't use a 1 meg for tone. With 1 meg, most of the effect is down around 0. If you want the brightest tone with pot at 10, use a no load pot. —If I'd stop buying old guitars to fix, I might actually learn to play. |
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Joined: Nov 21, 2012 Posts: 151 Montreal
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Posted on Jun 29 2022 11:03 AM
ldk wrote:
I don't know too much about electronics, so could you possibly elaborate? —The Men in Gray Suits (Montreal, Canada) |
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Joined: Nov 08, 2017 Posts: 369 San Francisco Bay Area
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Posted on Jun 29 2022 11:41 AM
Without getting technical, the treble circuit sends some of the pickup-generated voltage to ground. The resistance to ground comes from the resistance determined by the pot resistance and the position of the tone knob plus the frequency-dependent resistance coming from the tone capacitor. The higher the resistance of the pot, the greater the resistance for a given tone knob position. The ear (at least my ear) needs the overall resistance to be low enough to distinguish an effect on tone. So, the higher the pot resistance, the lower you need to turn the knob to achieve a given aural tone effect. What are you trying to achieve by going to 1 Meg? —If I'd stop buying old guitars to fix, I might actually learn to play. |
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Joined: Nov 21, 2012 Posts: 151 Montreal
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Posted on Jun 29 2022 11:47 AM
ldk wrote:
I'm not sure, but I think that the pot I have in there is already a 1meg pot. I need to replace it because it does absolutely nothing... it's like the tone is rolled all the way off and no amount of turning has any effect. I'm just looking to replace it, really. The guitar is a fairly new purchase for me and when I opened it up to see if there was something obvious making this happen, I notice that it looked like the tone pot had been changed at some point (bad solder job, messy). —The Men in Gray Suits (Montreal, Canada) |
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Joined: Nov 08, 2017 Posts: 369 San Francisco Bay Area
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Posted on Jun 29 2022 01:17 PM
Pots don't really break; they usually just get scratchy. So, you probably don't have to replace the pots, but given your description of bad soldering, you probably need to figure out the wiring and do some soldering yourself. —If I'd stop buying old guitars to fix, I might actually learn to play. |
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Joined: Nov 21, 2012 Posts: 151 Montreal
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Posted on Jun 29 2022 01:27 PM
ldk wrote:
At the price of a replacement pot, I might replace them just the same. It's a simple job that I think I can handle The Men in Gray Suits (Montreal, Canada) |
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Joined: Aug 18, 2008 Posts: 373 Orange, CA
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Posted on Jun 29 2022 09:03 PM
1 meg pots will give you the original Jazzmaster sound. Some like it, some don't. I personally love it. |
Joined: Mar 14, 2006 Posts: 2778 Atlanta, GA 
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Posted on Jun 30 2022 10:31 AM
I don't mean to sound condescending but is there a chance that the guitar is set in the rhythm circuit possibly due to a faulty selector switch or it just happens to be set in that position by mistake? I have also seen the pots swivel around and short out on other wiring under the pick guard due to a loose mounting nut. That swivel/shorting issue happens to jazzmasters when the selector switch gets loose and shorts out one pickup's circuit on the shielding under the pick guard. Good hunting, ed —Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps? |
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Joined: Nov 21, 2012 Posts: 151 Montreal
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Posted on Jun 30 2022 10:45 AM
eddiekatcher wrote: — The Men in Gray Suits (Montreal, Canada) |
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Joined: Nov 21, 2012 Posts: 151 Montreal
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Posted on Jul 04 2022 04:03 PM
...so I swapped out the tone pot with a new one and the tone control still doesn't work. I change the cap on it as well and that made no difference either. Any suggestions? —The Men in Gray Suits (Montreal, Canada) |
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