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Increasing treble/bite and reducing midrange in humbucker

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  • #31
    Here's to good ideas, hope it all works out.
    Last edited by big_teee; 01-05-2019, 09:54 PM.
    "If Hitler invaded Hell, I would make at least a favourable reference of the Devil in the House of Commons." Winston Churchill
    Terry

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    • #32
      Originally posted by Helmholtz View Post
      You might at least try to increase to 500k.
      Originally posted by big_teee View Post
      The 500k with the vintage wiring I showed should give more tone roll off.
      T
      Originally posted by Helmholtz View Post
      A 250k tone pot is like 500k tone pot turned "halfway" down.

      I purposely select 250k tone pots and smaller tone capacitors because I like a subtle rolloff and the taper isn't as sudden. I use varying shades of hf rolloff and never require the rapid and drastic changes that result from 500pk pots and larger tone caps( >0.033uF)

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      • #33
        Originally posted by Tone Meister View Post
        I purposely select 250k tone pots and smaller tone capacitors because I like a subtle rolloff and the taper isn't as sudden. I use varying shades of hf rolloff and never require the rapid and drastic changes that result from 500pk pots and larger tone caps( >0.033uF)
        Sounds like you have it under control.
        Good luck, I'm done!
        T
        "If Hitler invaded Hell, I would make at least a favourable reference of the Devil in the House of Commons." Winston Churchill
        Terry

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        • #34
          Originally posted by big_teee View Post
          Sounds like you have it under control.
          Good luck, I'm done!
          T
          Headed in the right direction, yes. Most definitely open to the 50's wiring or disconnecting the tone from the bridge.

          I will certainly know more after tonight's show. Thanks for all the great information!

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          • #35
            I purposely select 250k tone pots and smaller tone capacitors because I like a subtle rolloff and the taper isn't as sudden.
            What about a linear taper 500k tone pot? Linear is less "sudden" than audio/log taper.
            - Own Opinions Only -

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            • #36
              Originally posted by Helmholtz View Post
              What about a linear taper 500k tone pot? Linear is less "sudden" than audio/log taper.
              Good point, but realistically how much influence would increasing the value on the bridge tone pot actually have? The goal here is simply to increase treble/bite and slightly scoop the midrange. To change the tone pot to 500KL would make this guitar's tone control work differently than every other guitar I have.

              I feel like I've made some progress toward that goal. I will know much more after the show.

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              • #37
                I roughly simulated your pickup on LTspice. Since you only have one tone control the schematic you posted can't show us how your switch is wired. If the unused portions of your switch can be used to eliminate the 250k tone control strictly from the bridge only selection you can gain 5dB at the resonant peak of around 1.8kHz. Which is also bumped up in frequency a a couple hundred Hz from where it's at with the arrangement you have. Both effects should give a much "brighter" tone.
                Attached Files
                "Take two placebos, works twice as well." Enzo

                "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

                "If you're not interested in opinions and the experience of others, why even start a thread?
                You can't just expect consent." Helmholtz

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                • #38
                  Originally posted by Tone Meister View Post
                  Good point, but realistically how much influence would increasing the value on the bridge tone pot actually have? The goal here is simply to increase treble/bite and slightly scoop the midrange. To change the tone pot to 500KL would make this guitar's tone control work differently than every other guitar I have.

                  I feel like I've made some progress toward that goal. I will know much more after the show.
                  I can hear an increase in treble with a tone pot having only 20% higher value.
                  - Own Opinions Only -

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                  • #39
                    Originally posted by Chuck H View Post
                    I roughly simulated your pickup on LTspice. Since you only have one tone control the schematic you posted can't show us how your switch is wired. If the unused portions of your switch can be used to eliminate the 250k tone control strictly from the bridge only selection you can gain 5dB at the resonant peak of around 1.8kHz. Which is also bumped up in frequency a a couple hundred Hz from where it's at with the arrangement you have. Both effects should give a much "brighter" tone.
                    How did you simulate the secondary resonance/antiresonance around 100kHz? Very curious!
                    - Own Opinions Only -

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                    • #40
                      Originally posted by Tone Meister View Post
                      I purposely select 250k tone pots and smaller tone capacitors because I like a subtle rolloff and the taper isn't as sudden. I use varying shades of hf rolloff and never require the rapid and drastic changes that result from 500pk pots and larger tone caps( >0.033uF)
                      What are you using for a treble bleed?
                      Originally posted by Tone Meister View Post
                      I am asking specifically about ideas to tweak the existing pickup. No doubt the issue is the maple wood in this guitar body and I want to adjust it out.

                      All my guitars have treble bleeds - and the TBs have no affect on the circuit when the volume is wide open.
                      I use 10' cables to my pedalboards always, 22 pF/ft
                      I have 500k pots

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                      • #41
                        Originally posted by John_H View Post
                        What are you using for a treble bleed?
                        1nF in parallel with a 100k resistor.

                        Fellas, listen up: I have this very same setup in two other guitars and don't have these issues. The only difference is this guitar has a maple body and a rock maple neck. The other two have alder bodies and maple necks. All three have rosewood fingerboards. I am absolutely convinced the body/neck wood is the culprit here. And the goal is to offset that with some minor tweaks.

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                        • #42
                          Originally posted by Tone Meister View Post
                          1nF in parallel with a 100k resistor.

                          Fellas, listen up: I have this very same setup in two other guitars and don't have these issues. The only difference is this guitar has a maple body and a rock maple neck. The other two have alder bodies and maple necks. All three have rosewood fingerboards. I am absolutely convinced the body/neck wood is the culprit here. And the goal is to offset that with some minor tweaks.
                          Maple, being a fairly heavy, dense and hard wood is not known to suppress highs.
                          Last edited by Helmholtz; 01-06-2019, 12:21 AM.
                          - Own Opinions Only -

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                          • #43
                            Originally posted by Tone Meister View Post
                            I purposely select 250k tone pots and smaller tone capacitors because I like a subtle rolloff and the taper isn't as sudden. I use varying shades of hf rolloff and never require the rapid and drastic changes that result from 500pk pots and larger tone caps( >0.033uF)
                            Originally posted by Tone Meister View Post
                            I am asking specifically about ideas to tweak the existing pickup. No doubt the issue is the maple wood in this guitar body and I want to adjust it out.

                            All my guitars have treble bleeds - and the TBs have no affect on the circuit when the volume is wide open.
                            I use 10' cables to my pedalboards always, 22 pF/ft
                            I have 500k pots
                            Originally posted by Tone Meister View Post
                            1nF in parallel with a 100k resistor.

                            Fellas, listen up: I have this very same setup in two other guitars and don't have these issues. The only difference is this guitar has a maple body and a rock maple neck. The other two have alder bodies and maple necks. All three have rosewood fingerboards. I am absolutely convinced the body/neck wood is the culprit here. And the goal is to offset that with some minor tweaks.
                            Well, maybe I could help, but now I would rather not.

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                            • #44
                              Originally posted by Tone Meister View Post
                              Fellas, listen up: I have this very same setup in two other guitars and don't have these issues. The only difference is this guitar has a maple body and a rock maple neck. The other two have alder bodies and maple necks. All three have rosewood fingerboards. I am absolutely convinced the body/neck wood is the culprit here. And the goal is to offset that with some minor tweaks.
                              One sure way to find out if it is the pickup or the maple guitar is to swap the bridge pickups of the two guitars and see if the problem stays with the maple guitar or the pickup!!!
                              =============================================

                              Keep Winding...Keep Playing!!!

                              Jim

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                              • #45
                                Originally posted by Jim Darr View Post
                                One sure way to find out if it is the pickup or the maple guitar is to swap the bridge pickups of the two guitars and see if the problem stays with the maple guitar or the pickup!!!
                                This^^^^^^^^^^^^^^^^^^

                                It's possible there is something electronically different. The wind, a missed error in the wiring, etc. I wouldn't expect a asymmetrical humbucker in a maple guitar to sound more midrange than normal unless something is pinching off the highs.
                                "Take two placebos, works twice as well." Enzo

                                "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

                                "If you're not interested in opinions and the experience of others, why even start a thread?
                                You can't just expect consent." Helmholtz

                                Comment

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