Members do art Posted March 7, 2008 Members Share Posted March 7, 2008 It would be so I could get the same loading effect of a 500K audio pot without one actually being in the guitar. I'm thinking of wiring up a guitar without a pot. I'd be using a mini DPDT switch as a pickup on/off. What value resistor would work best for this? How many volts etc. should I use? Would it be correct to wire the resistor in series with the pickup's output? Link to comment Share on other sites More sharing options...
Members KRAA!! Posted March 7, 2008 Members Share Posted March 7, 2008 When the knob is "all the way up", it should have about zero resistance, so none. Link to comment Share on other sites More sharing options...
Members flump Posted March 7, 2008 Members Share Posted March 7, 2008 What is it going to replace, volume or tone? If it is tone, then do you want it at "10" on the dial or "0", or somewhere in between. Link to comment Share on other sites More sharing options...
Members Wyatt Posted March 7, 2008 Members Share Posted March 7, 2008 Would it be correct to wire the resistor in series with the pickup's output? No, not series in the Hot. This is resistance to Ground, so you want to wire it from the hot to a Ground somewhere between the PU and the jack, you can even solder the resistor directly from the Hot lug to the Ground lug of the jack. Link to comment Share on other sites More sharing options...
Members slight-return Posted March 7, 2008 Members Share Posted March 7, 2008 typically, guitar volume controls are wired as voltage dividers -- the pot is in parallel with the pickup (so you have the full voltage drop across the pot) and th wiper position "selects" how much voltage the wiper "sees" as sort of a variable tap (conceptually you can think about it like Lug A to wiper as one resistor, Wiper to lug B as a second resistor...when you move the wiper, the two resistors may vary, but always add up to the total...500K ) so if you wanted to simulate the voicing of a 500Kohm pot, you'd put a 500K ohm resistor in parallel with the pickup Edit : oopies - cross post (ie what wyatt said) Link to comment Share on other sites More sharing options...
Members Wyatt Posted March 7, 2008 Members Share Posted March 7, 2008 typically, guitar volume controls are wired as voltage dividers -- the pot is in parallel with the pickup (so you have the full voltage drop across the pot) and th wiper position "selects" how much voltage the wiper "sees" as sort of a variable tap (conceptually you can think about it like Lug A to wiper as one resistor, Wiper to lug B as a second resistor...when you move the wiper, the two resistors may vary, but always add up to the total...500K ) so if you wanted to simulate the voicing of a 500Kohm pot, you'd put a 500K ohm resistor in parallel with the pickup Edit : oopies - cross post (ie what wyatt said) Must have been adding my last couple of comments as you were typing. But , "parallel" sums it up best. The OP just wants that 500K resistor running from the PU's Hot to the PU's Ground somewhere before both leave the guitar Link to comment Share on other sites More sharing options...
Members slight-return Posted March 7, 2008 Members Share Posted March 7, 2008 hey do art, one fun way you could do it is instead of using a fixed resistor is to use a trimmer instead to make sort of a "variable voicing" system, so you could tune it to your likingeh maybe overkill but if you are still playing with how this effects your sound, might be worth it Link to comment Share on other sites More sharing options...
Members Armitage Posted March 7, 2008 Members Share Posted March 7, 2008 Off hand, I don't think you can buy a 500k resistor, you'll have to choose between a 480K? and a 540K? ... get the 540K? IMHO. Link to comment Share on other sites More sharing options...
Members Wyatt Posted March 8, 2008 Members Share Posted March 8, 2008 Off hand, I don't think you can buy a 500k resistor, you'll have to choose between a 480K? and a 540K? ... get the 540K? IMHO. Sure, you can buy 498K, 499K, 500K, 510K, 511K. But I doubt you'll find them at Radio Shack, they would have to be bought from a electronics wholesaler like mouser. Link to comment Share on other sites More sharing options...
Members do art Posted March 8, 2008 Author Members Share Posted March 8, 2008 Thank you all! Link to comment Share on other sites More sharing options...
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