BrunoBass Posted March 23, 2018 Share Posted March 23, 2018 I recently saw the attached photo on Instagram, of two Jazz basses with what appears to be just a single volume control. One of my Jazz’s is a passive J&D copy, which I only ever use with both pickups on full and master tone on full, so having just a single volume control appeals. I can’t find a wiring diagram anywhere, does anyone know where to find one, and has anyone performed this modification? Quote Link to comment Share on other sites More sharing options...
BrunoBass Posted March 23, 2018 Author Share Posted March 23, 2018 PS: I love that white over black... Quote Link to comment Share on other sites More sharing options...
sifi2112 Posted March 23, 2018 Share Posted March 23, 2018 Yeah done it to both my Jazz basses .. J&D is also one of them. I actually got luthier to do it coz I’m not the best at soldering .. I believe (if you google standard jazz bass wiring) you can just ignore the second vol & tone pot wiring & solder both pickups to the first vol pot then to output jack Quote Link to comment Share on other sites More sharing options...
paul_5 Posted March 23, 2018 Share Posted March 23, 2018 (edited) Is this any help? Edited March 23, 2018 by paul_5 1 1 Quote Link to comment Share on other sites More sharing options...
BrunoBass Posted March 23, 2018 Author Share Posted March 23, 2018 1 hour ago, paul_5 said: Is this any help? Thanks 👍🏻 Quote Link to comment Share on other sites More sharing options...
paul_5 Posted March 23, 2018 Share Posted March 23, 2018 you know, if you wanted to you could add a series/parallel switch using a pull/push knob - still only one control... 1 Quote Link to comment Share on other sites More sharing options...
BassBunny Posted March 26, 2018 Share Posted March 26, 2018 In your original post you say you have the tone control "Full On". Is that as in full Bass or full Treble? Depending on which you may need to add a capacitor to the circuit to replicate the tone control. Quote Link to comment Share on other sites More sharing options...
Owen Posted March 26, 2018 Share Posted March 26, 2018 As I get older I find myself using tone more and more - but that one big vol knob is way cool Quote Link to comment Share on other sites More sharing options...
BrunoBass Posted March 26, 2018 Author Share Posted March 26, 2018 14 hours ago, BassBunny said: In your original post you say you have the tone control "Full On". Is that as in full Bass or full Treble? Depending on which you may need to add a capacitor to the circuit to replicate the tone control. Full treble. Quote Link to comment Share on other sites More sharing options...
Grangur Posted March 27, 2018 Share Posted March 27, 2018 8 hours ago, BrunoBass said: Full treble. Strangely, as that is with the capacitor doing as little as possible, isn't that "full off"? I can understand why it's "full on" as it calls for the pot to be turned fully in the same direction as full volume. Sorry ramblings if a madman.. Quote Link to comment Share on other sites More sharing options...
Norris Posted March 27, 2018 Share Posted March 27, 2018 12 minutes ago, Grangur said: Strangely, as that is with the capacitor doing as little as possible, isn't that "full off"? I can understand why it's "full on" as it calls for the pot to be turned fully in the same direction as full volume. Sorry ramblings if a madman.. Pedant Quote Link to comment Share on other sites More sharing options...
BassBunny Posted March 27, 2018 Share Posted March 27, 2018 10 hours ago, BrunoBass said: Full treble. No capacitor needed then. Quote Link to comment Share on other sites More sharing options...
BigRedX Posted March 27, 2018 Share Posted March 27, 2018 31 minutes ago, BassBunny said: No capacitor needed then. Actually you might need to. Having the tone control on full treble isn't the same as removing it altogether - usually the sound will be even brighter since the tone control is always removing some of the top end from the sound. You can replicate the circuit in its full treble position with a resistor of the same value as the tone pot and the capacitor in series wired between the signal and the earth. Quote Link to comment Share on other sites More sharing options...
BrunoBass Posted March 27, 2018 Author Share Posted March 27, 2018 Thanks all. I don’t know my capacitor from my elbow. Quote Link to comment Share on other sites More sharing options...
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