Can bass cut be done on a 250k or 500k push pull?

bdplaid

bdplaid

Aug 31, 2007
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#1
I'm playing around with a bass cut circuit, and it seems I could just just follow the g&l circuit, but no...
If like to get it to work on a push pull tone knob, one for treble, the other for bass. I currently have 250k and 500k push pulls.

What say you masters?
 
#2
Do you want it to be a regular tone knob in one position and the bass cut in the other? That'll take some tricksy wiring if it's even possible - trying to use it in two circuits. Or is your question about whether 500K is enough? If that's it, just try it and see? Might impact volume.
 
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#3
I'm going to try it and see. But re the question, I'm after using a regular 250 or 500 with a switch on it to be a regular tone in one position (easy), and a bass cut in the other (never done it). I kbow what value cap to use if I were doing this with a 1Meg pot, but not sure what to use for the other value pots . Or if it'll eve work.
 
#4
Cap would be the same, but 250/500 won't give you much fine control over the cut even if the wiring switching could be made to work. I'd be tempted to just wire it as a tone pot with a set value bass cut cap on the push/pull.
 
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#5
500k isn’t going to get you the bass cut I don’t think as it is still too low of a value. I think you’d still need to go the 1meg route but I could be wrong as I’ve never tried a 500k pot wired to be a bass instead of a treble control, only a 1meg pot. Also, a push/pull or push/push type pot I don’t think would allow you to use the treble and bass at the same time if you were wanting to be able to tailor both together simultaneously, as they usually as far as I have seen, always been an either or type control, not for both at the same time. You’d want to find a concentric pot in order to be able to use both the treble and bass controls at the same time. If you only want to be able to use treble or bass one at a time and not together, then the push/pull or a push/push would work if you find one with the right values to accomplish the two separate functions.
 
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#6
bdplaid said:
I'm going to try it and see. But re the question, I'm after using a regular 250 or 500 with a switch on it to be a regular tone in one position (easy), and a bass cut in the other (never done it). I kbow what value cap to use if I were doing this with a 1Meg pot, but not sure what to use for the other value pots . Or if it'll eve work.
Click to expand...
Fender Jaguar guitar, Rickenbacker vintage circuit, etc.: wire in a capacitor in-line on the hot lead of the pickup. You choose the value: Jaguar's "choke" switch was a .0068 microfarads; Rickenbacker uses a .0047 microfarads. I use a .01 to the bridge pickup of a typical J-bass wiring. The value of the cap determines the cut-off frequency. The pot really doesn't matter. I would suggest a linear pot for progressive control over the amount of cut. You probably can get by with a 250 kohm pot; a 500 kohm pot will probably keep the tone just a hair brighter. I would not use a 1 meg pot, because 1 meg pots tend to be all-or-nothing and hard to get a middle controllable position.
 
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#7
darkwasthenight said:
Cap would be the same, but 250/500 won't give you much fine control over the cut even if the wiring switching could be made to work. I'd be tempted to just wire it as a tone pot with a set value bass cut cap on the push/pull.
Click to expand...
That's actually where this started, as a tone cap selector switch. I quickly realized I'm not going to use the alternate tone if I select the main cap properly, currently a .068. I wanted a darker tone. .1 cut out a ton of volume, so I went in between .047 and .1 . Then I got the bright idea to wire up a bass cut. I know it would operate independently of the high cut.
 
#8
Are you looking to have the bass cut be variable, or just on/off with the push/pull pot engaged or not? The latter is pretty straightforward, it's what Rickenbacker does on the 4003 models, but turning the knob only affects the traditional high filter circuit with the cap wired in parallel. Pulling the knob out also engages a cap wired in series but you can't control how much bass it filters out; it's all or nothing.
 
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#9
bdplaid said:
That's actually where this started, as a tone cap selector switch. I quickly realized I'm not going to use the alternate tone if I select the main cap properly, currently a .068. I wanted a darker tone. .1 cut out a ton of volume, so I went in between .047 and .1 . Then I got the bright idea to wire up a bass cut. I know it would operate independently of the high cut.
Click to expand...
Um, you are referencing standard tone cap values, or low-pass values; not bass cut, or high-pass values. Please re-read my post and make sure you have the correct number of zeros in the value after the decimal point for microfarads.
 
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