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passive tone control on an active bart pre

Discussion in 'Pickups & Electronics [BG]' started by dooft11, Jun 14, 2005.


  1. dooft11

    dooft11 Supporting Member

    Dec 30, 2003
    HongKong
    Dear all
    i have a 3 band bart pre installed on my bass, and i had wired it with Active/passive {pull/push} switch, can i add a passive tone control? and how shall it be wired? really need help. i dont mind drill another hole for a seperate pots
    Also, i would like to buy some 50K pots with center detent, can anyone suggest some internet store besides allparts and stewmac which sell good quality stuff?
    thanks again

    Please if you can illustrate the wiring scheme.. will be great.... :hyper: :help:
     
  2. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    I've bought 50k center detent pots from the aguilar online store before.

    Adding a tone control is simple, you'd just add a standard tone control pot inbetween the master volume out and the jack. What is your prior experience with this type of stuff?
     
  3. dooft11

    dooft11 Supporting Member

    Dec 30, 2003
    HongKong
    thanks Dave
    from the scheme listed in bart site
    the passive and Active switch is wired with Push/Pull pots
    which the signal flow sequence is
    1. signal from blend pot ->
    2. Pre amp in ->
    3. Pre amp out - >
    4. Vol pots in ->
    5. Vol pots out ->
    which the push pull switch give an option to bypass step 2 and 3.- which is what working fine in my current setting
    so based on your advise i shall add the tone control after step 5? right before the signal go into the jack lug?
    by doing so, the tone pot will affect the tone of the 'amp'ed active signal. am i right? with an addition on-on switch help?

    or i should wire the tone pots somewhere between step 3 and 4.

    Thanks again for your help, anyone else willing to help? :ninja: ;)
     
  4. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    You could put it between 1 and 2, or after 5. Sadowsky preamps with vintage control have the tone control after the preamp IIRC
     
  5. ldervish

    ldervish

    May 22, 2005
    Johnson City, TN
  6. dooft11

    dooft11 Supporting Member

    Dec 30, 2003
    HongKong
    dear all thanks for the advise, i will give it a try, report later...
     
  7. BillyB_from_LZ

    BillyB_from_LZ Supporting Member

    Sep 7, 2000
    Chicago
    I didn't look for anything specific but take a look at www.potentiometer.com (also works as www.potentiometers.com).

    If the passive tone control goes after the preamp, you'd probably want to scale the control value and cap to what EMG uses...
     
  8. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    yeah, forgot to mention that. thanks.