Values to adjust treble bleed circuit

Discussion in 'Tele-Technical' started by milocj, Aug 8, 2019.

  1. milocj

    milocj Friend of Leo's Ad Free Member

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    A used Tele that I bought has a treble bleed installed and after having a nice rolloff until about 7-8 it gets too thin and rolls out too much low end. Is there a basic rule for a value change? Something like needing to increase or decrease the cap value by a certain percentage to make a minor or fairly noticeable change?
     
  2. DavidP

    DavidP Friend of Leo's

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    My friendly advice is nuthin'...
    Pull it, move a wire, and go with 50s wiring!! If you don't like it, replace and go down the rabbit hole playing with different R/C values.
     
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  3. Ricky D.

    Ricky D. Doctor of Teleocity

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    I use 680 pF and 220K, parallel. Works well with vintage wind single coils.
     
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  4. tessting1two

    tessting1two Tele-Meister

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    Clip the existing treble bleed at one end and see how you like the sound with no treble bleed at all. If you think it's too dark as you roll down the volume, get yourself an adjustable treble bleed and adjust to taste: https://guitarelectronics.com/v-treb-variable-treble-bleed-circuit/

    There are many variables that ultimately determine the "optimum" values including the taper and value of the volume pot and even the length and capacitance of your guitar cable. It's a compromise involving a lot of trial and error, or perhaps more accurately, very little trial and error and settling for "good enough" results.
     
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  5. milocj

    milocj Friend of Leo's Ad Free Member

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    I'll most likely pop it out, or maybe rig up a variable version if I have the parts. I don't normally use a treble bleed circuit but this one was nice over the small range that it didn't get too thin so I thought it might be easy to determine what amount of a change would make it more useable.
     
  6. tessting1two

    tessting1two Tele-Meister

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    Many ages ago I found out that John Suhr uses the same values on his single coil guitars:
    • 680pf/220k - single coils w/250k pots
    • 1000pf/220k - humbuckers w/500k pots
    • 680pf/150k - HSS guitars with 500k pots and resistors so single coils see 250k
    Personally I have found 680pf to be a bit much for my tastes so I start lower and work my way up if need be. Also, wiring the cap & resistor in series as opposed to parallel (Kinman style) makes the effect more subtle.
     
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  7. jvin248

    jvin248 Poster Extraordinaire

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    .

    Don't do 50s wiring unless you leave the tone knob dimed, otherwise the tone knob adjusts volume too!

    search 'guitarnutz2' forum for treble bleed and johnh. best TB run through I've seen.

    .
     
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  8. Andy B

    Andy B Friend of Leo's Gold Supporter

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    I like a 390pf or 470pf cap.
     
  9. Ricky D.

    Ricky D. Doctor of Teleocity

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    You can use alligator clips to run test leads out of the control cavity to try out different values without all the tear down and soldering.
     
  10. Norris Vulcan

    Norris Vulcan Tele-Holic

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    You can always snip the cap and use croc clips to attach caps of different values.
     
  11. SPUDCASTER

    SPUDCASTER Poster Extraordinaire Silver Supporter

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    ^^This^^

    Ah, the beauty of Leo's concoction.

    It can be played with the guts exposed.:D
     
  12. jackal

    jackal Tele-Afflicted Gold Supporter

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    If you lower the value of the capacitor the tone knob will have much less effect on the volume. I use .01 on all my Teles. Knocks off enough of the treble for me, yet makes the 50s' wiring mod much more useful.
     
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