Post by asmith on Oct 3, 2020 8:46:06 GMT -5
Here's a module for folk who find that once a pickup is out of phase with other pickups its regular tone control is less useful than they would like.
The concept for this module is that dialing in a pickup's 'level' of out-of-phase-ness might be more useful if only that pickup's mid-levels provide an out-of-phase signal. This would leave the high and low frequencies of the other pickup intact.
When the Push/Pull pot is down, the Tone Control is a regular High-Cut Tone Control. C1 is the only active capacitor, acting 'across' the pickup. When the Tone Control is at 10, the Purple-wired Centre Lug of the potentiometer has all of the potentiometer's resistance between it and C1. When the Tone Control is at 0, the Purple-wired Centre Lug has very little or no resistance to the Red-spot-soldered Left Lug, and high-frequency signal passes easily through C1 to ground.
When the Push/Pull pot is up, the Tone Control is a Mid-pass Tone Control: the highs are cut, and the lows are cut. C1 acts 'across' the pickup. C2 is in parallel with the potentiometer's variable resistance. When the Tone Control is at 10, the Purple-wired Centre Lug has very little or no resistance between it and the Yellow-wired Right Lug which allows signal to bypass C2 and pass easily to the module's Output wire. The Purple-wired Centre Lug also has the entire potentiometer's resistance between it and C1, through which high-frequency signal passes to ground. When the Tone Control is at 0, the Purple-wired Centre Lug has the entire potentiometer's resistance in parallel with C2, only allowing signal above a certain frequency (determined by C2's capacitance) from P– through C2 to the Output wire, and has very little or no potentiometer-resistance between it and the Red-wired Left Lug, so that from the signal with its low frequencies cut by having passed through C2, the high frequencies of that signal pass easily through C1 to ground, leaving the signal going to the Output having had both its high and low frequencies cut.
I recommend C1 be a 22nF capacitor.
I recommend C2 be a 6.8nF capacitor.
| Label | Description |
| C1 | Capacitor #1 |
| C2 | Capacitor #2 |
| P+ | Pickup Hot wire |
| P- | Pickup Grd wire |
The concept for this module is that dialing in a pickup's 'level' of out-of-phase-ness might be more useful if only that pickup's mid-levels provide an out-of-phase signal. This would leave the high and low frequencies of the other pickup intact.
When the Push/Pull pot is down, the Tone Control is a regular High-Cut Tone Control. C1 is the only active capacitor, acting 'across' the pickup. When the Tone Control is at 10, the Purple-wired Centre Lug of the potentiometer has all of the potentiometer's resistance between it and C1. When the Tone Control is at 0, the Purple-wired Centre Lug has very little or no resistance to the Red-spot-soldered Left Lug, and high-frequency signal passes easily through C1 to ground.
When the Push/Pull pot is up, the Tone Control is a Mid-pass Tone Control: the highs are cut, and the lows are cut. C1 acts 'across' the pickup. C2 is in parallel with the potentiometer's variable resistance. When the Tone Control is at 10, the Purple-wired Centre Lug has very little or no resistance between it and the Yellow-wired Right Lug which allows signal to bypass C2 and pass easily to the module's Output wire. The Purple-wired Centre Lug also has the entire potentiometer's resistance between it and C1, through which high-frequency signal passes to ground. When the Tone Control is at 0, the Purple-wired Centre Lug has the entire potentiometer's resistance in parallel with C2, only allowing signal above a certain frequency (determined by C2's capacitance) from P– through C2 to the Output wire, and has very little or no potentiometer-resistance between it and the Red-wired Left Lug, so that from the signal with its low frequencies cut by having passed through C2, the high frequencies of that signal pass easily through C1 to ground, leaving the signal going to the Output having had both its high and low frequencies cut.
I recommend C1 be a 22nF capacitor.
I recommend C2 be a 6.8nF capacitor.