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Wiring Gurus Help!

Discussion in 'Pickups & Electronics [BG]' started by Snakeman1066, Aug 7, 2013.

  1. ok wiring gurus....

    converting a P to a PJ

    pulled the trigger on a set of Bill Lawrence (P-46 and J-45)

    i have decided that by going with a stacked CTS 500k concentric pots I can eliminate the need to relocate the output jack to the side of the bass and save me some hassle? So I want to do volume/tone...volume/tone

    what value capacitors would you suggest.? .022uf or .047uf? 0r something else? and maybe a .001uf between the hot terminals of the volume pot for a treble boost/bleed at lower volume?
  2. "Most guitars and basses with passive pickups use between .01 and .1MFD (Microfarad) tone capacitors with .02 (or .022) and .05 (or .047) being the most common choices. The capacitor and tone pot are wired together to provide a variable low pass filter. This means when the filter is engaged (tone pot is turned) only the low frequencies pass to the output jack and the high frequencies are grounded out (cut) In this application, the capacitor value determines the "cutoff frequency" of the filter and the position of the tone pot determines how much the highs (everything above the cutoff frequency) will be reduced. So the rule is: Larger capacitors will have lower cutoff frequency and sound darker in the bass setting because a wider range of frequencies is being reduced. Smaller capacitors will have a higher cutoff frequency and sound brighter in the bass setting because only the ultra high frequencies are cut...."

    so if i understand the above paragraph correctly for brighter sounding pups in the bass seting of the tone knob... i want to use the .022uf? and for darker sounding pups i want to use the .047 uf?
  3. so after looking at multiple examples of wiring diagrams the .047uf seems to be fairly standard in most bass guitar applications...

    are there any advantages to using the .022uf? disadvantages? .033 maybe?


    Maybe i should mix and match?....lol
  4. I installed a multi cap switch in my pbass, .047, .0047, .022. I like having the tone differences, when I run the .0047 I get a solo tone with the lows rolled off alot, but get a fatter tone with the lows rolled off less on the other caps.
  5. thanks
  6. Angel LaHash

    Angel LaHash

    Aug 24, 2012
  7. bassbenj


    Aug 11, 2009
    .047 is pretty standard for basses. My favorite circuit is an on-off-on mini switch that lets you choose .047 (original), .015 (leaves more mids) and off (none...as bright as the bass goes).

    I usually sort let things in off or bright position (note that since even when tone is max there is still some resistance in the tone circuit, the "off" switch give a tone slightly brighter than even with tone maxed)

    After playing around for a while, for me, I finally came to settle on .015 mfd as a tone cap that I like as an alternative to the standard .047 mfd. one. YMMV Just try a few values and see what YOU like.
  8. Angel LaHash

    Angel LaHash

    Aug 24, 2012
    Treb Bleed
    I think G&L have a 200pF treb bleed on there units

    I use 1nF 10-6, 440pF 6-4 and 4-2 220pF and a turn off at 1
    oh with a 180K Resister in Parallel
  9. ex-tension


    Jun 11, 2009
  10. Angel LaHash

    Angel LaHash

    Aug 24, 2012
    would not a Blend Pot be better than TWO Volume and 2 Resisters

    or a blend pot and a Master Volume, that too would cut out the 2 Resisters
  11. Levin S

    Levin S Supporting Member

    Apr 21, 2007
    Charlotte N.C.
    When I rewired my stacked knob AVRI 62 j bass I disassembled the concentric pots to add linear taper wafers for the volume knobs. It lets me blend pickups much better. Just an idea for ya :)
  12. Angel LaHash

    Angel LaHash

    Aug 24, 2012
    The Blend Pan with Dual Pot seems to mix very well.. form the look not tried it myself yet
  13. trying not to relocate the input jack to the side...the route is rather small at the end of the PG anyway and i would have to use a mini pot...

    so after thinking about it and finally finding a CTS 500K balance/blend pot, i think i have decided to go as follows:

    Master Volume/Tone CTS 500K stacked pot with a .033uf orange drop cap (split the difference between .047uf and .022 uf)

    CTS 500k blanace/blend pot

    switchcraft gold jack...

    still trying to decide if i want to do the treble bleed mod but in the event i do it will be with a .001 cap combined with a 150k ohm 1/2 watt resistor
  14. Angel LaHash

    Angel LaHash

    Aug 24, 2012
    lol chicken for going middle of the road

    I would like to know more about a Treb Bleed for a bass, i made one for a strat