Members ksl Posted April 13, 2022 Members Share Posted April 13, 2022 (edited) Greetings,, This in my wonderful rescue, a '71 Harmony MARQUIS, that I put new pups in, opened up & cleaned out both switches, & got it working great,,, Sounds amazing, BUT when I roll the tone pot down, not a whole lot happens until you get to 2... Basically, it's either in or out,, akin to some strange taper I once encountered with a linear pot where I was not getting a smooth sweep,,,, I swapped the pot out, changed the cap, & my diagram is exactly what's under the hood. Is there another way or place for the tone cap to go that would address this anomaly?? Thnx in advance... Edited April 13, 2022 by ksl Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 14, 2022 Moderators Share Posted April 14, 2022 try putting the capacitor between the volume in and the tone out. I'm assuming they are both audio taper pots at 250K ohm. 1 Quote Link to comment Share on other sites More sharing options...
Members 1001gear Posted April 15, 2022 Members Share Posted April 15, 2022 I gotta ask if that is or not the same thing. (?) Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 15, 2022 Moderators Share Posted April 15, 2022 not... Quote Link to comment Share on other sites More sharing options...
Members 1001gear Posted April 15, 2022 Members Share Posted April 15, 2022 It all goes to ground doesn't it? Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 15, 2022 Moderators Share Posted April 15, 2022 no.... Quote Link to comment Share on other sites More sharing options...
Members 1001gear Posted April 16, 2022 Members Share Posted April 16, 2022 Having trouble picturing this. Quote Link to comment Share on other sites More sharing options...
Members gardo Posted April 16, 2022 Members Share Posted April 16, 2022 18 hours ago, 1001gear said: It all goes to ground doesn't it? Everything goes to ground eventually . It’s what happens along the way and in what order 1 1 Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 16, 2022 Moderators Share Posted April 16, 2022 5 hours ago, gardo said: Everything goes to ground eventually . It’s what happens along the way and in what order well, the prime signal doesn't go to ground....everything else does Quote Link to comment Share on other sites More sharing options...
Members 1001gear Posted April 16, 2022 Members Share Posted April 16, 2022 Gotta take your word for it. Seems to me like cap and resistor in series is the same as resistor and cap in series. Been too long since I poked around inside my guitar. Quote Link to comment Share on other sites More sharing options...
Members gardo Posted April 16, 2022 Members Share Posted April 16, 2022 3 minutes ago, daddymack said: well, the prime signal doesn't go to ground....everything else does Yes but in the end there will be a ground somewhere to complete the circuit. Electricity flows between hot and ground so somewhere, somehow everything goes to ground . I was just being an ass Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 16, 2022 Moderators Share Posted April 16, 2022 1 hour ago, gardo said: Yes but in the end there will be a ground somewhere to complete the circuit. Electricity flows between hot and ground so somewhere, somehow everything goes to ground . I was just being an ass My point was about within the guitar....but yes, once it reaches the amplifier, and the 'signal processing' starts, ultimately nothing escapes the 'eternal loop' 1 Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted April 24, 2022 Moderators Share Posted April 24, 2022 Another potential culprit is the ratio of the tone pot...ksl, you said you swapped out the pot and no change, and mentioned linear pot issues from the past, so I initially didn't consider that...but do you know what the taper ratio is on those pots? 'Audio taper' has multiple tapers, so if you don't specify a 60:40 ratio, you could have a 90:10 [reversed log] ratio which would account for your results. Just another possible explanation... Quote Link to comment Share on other sites More sharing options...
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