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problem with tone control on stratocaster

Discussion in 'Electronic Design' started by shadow151, Jun 6, 2007.

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  1. shadow151

    shadow151 Guest

    I've modified my guitar like so: http://www.1728.com/guitar2.htm I
    also replace the stock pickups with mighty mite pickups which are 5.2k
    ohms and have an inductance of 3.8H. Anyway it all works great except
    for the tone control, when it is turned down the volume fades out at
    about 3. Here was the original wiring, I did not have this problem
    with it. It had a separate tone control for the neck and middle
    pickups. The new wiring has only one tone control. I moved the tone
    control before the volume in the circuit since thats how it was in the
    stock wiring and it improved it a little(the volume starts to fade out
    at a lower setting). I'm thinking a might also need to put a lower
    value capacitor too or something, any ideas?
     
  2. Fletch

    Fletch Guest


    This looks pretty straight forward. Have you traced everything to be
    sure it is all wired correctly. Yes, it's an annoying little question,
    but oftentimes a wire is going to the wrong place.

    Also, what about your grounding from the pots. Where is it going? And
    the cap; where are you grounding that?

    Got a picture to share of your wiring job that shows the details? That
    would help.

    --Fletch
     
  3. GregS

    GregS Guest

    What are the specs on the orginals? What value cap do you have?

    greg
     
  4. shadow151

    shadow151 Guest

    I measured the old squire pups they are 3.7k ohms each. I'm using star
    grounding, all grounds is connected to a common point. The cap is
    0.033uf which is stock. The tone and volume control use 500k ohm pots.
    Would the Xc/R ratio come into play with the tone circuit? I played
    with it some and the ratios where rather big which would indicate that
    the circuit is mosty resistive. So that would mean when the pots have
    a low resistance the signal would get pulled to ground. Do i just need
    to use a smaller cap to increase Xc? Around what ratio should i be
    looking for? Other guitars seem to use around the same values( 0.033
    or 0.047uf caps with 500k pots).
     
  5. Fletch

    Fletch Guest


    Older strats and teles used 250Kohm pots and the 0.047uf caps (or
    values there abouts on the cap). The higher the value on the cap, the
    less high frequencies get through. The 250Kohm pots are pretty typical
    for single coil pickups. The lower the value the more highs that get
    through.

    So you can balance your pots and caps to obtain the sound you're
    looking for as far as frequency range.

    --Fletch
     
  6. shadow151

    shadow151 Guest

    Frequency range isn't really my problem, the problem is that the tone
    control acts like a volume when its turned down below 4. I can take it
    apart and take a photo of the wiring if i must. I did check the wiring
    over several times it just like on that web site except i moved the
    tone control before the volume.
     
  7. Marra

    Marra Guest

    The action of the tone control depends very much on the note you are
    playing.

    You cant expect to turn down the tone tone and still get high notes !
    and vice versa.
     
  8. Nil

    Nil Guest

    You you can, and should. The guitar's tone control only affect the
    note's higher overtones - it hardly affects the fundamental at all. If
    you can't clearly hear every note on the instrument even with the tone
    turned all the way down, something is very wrong.
     
  9. shadow151

    shadow151 Guest

    I hear nothing when its turned all the way down the volume starts to
    fade out at around 4(of 10)
     
  10. Fletch

    Fletch Guest


    I'm at a loss here without seeing the actual wiring configuration
    you've done. I'm wondering if you may not have inadvertantly wired the
    switch wrong and it is causing some cross 'contamination'.

    --Fletch
     
  11. Marra

    Marra Guest

    The tone control on my Peavey turns down the volume of high notes.
    You can barely hear the high notes with it turned right down.
    But hang on, thats what a tone controls supposed to do !
     
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