Hi Fellas, When I first joined the forum, I was whining about what to do with the enigma of the Bourns Dual Gang Push-Pull Pot. Today I was working on another tone mod that I’ve been perfecting, when I suddenly had a revelation. I could use the Bourns Dual Gang Push Pull with the mod!!
I hope the diagram comes out well and I hope someone else could use it in the future. It’s a 5 tone mini on/on/on varitone tethered to the Bourns Dual Gang Push-Pull that is also wired for a pickup phase. I’m putting it in a Yamaha Pacifica with a Seymour JB.
With a small footprint, the push pull and switch gives the guitarist a tone pot with 5 values; and, with phase.
I can finally let go of my obsession with the Bourns Dual Gang Push-Pull.
Bunny, You’re exactly right on both the wafer and the values generated. After further use, those duplicate values are not what I want to achieve and just can’t get it to work the way I want. I don’t know if it could ever work the way I want. What I intended to achieve was to get 5 values. .01,.022,.047,.1 with a series interaction of .015 in the middle position. It made sense at first that if I placed 4 caps on each corner, and wired the dual gang correctly, that I could achieve the 5 tones rolling right or left. I believe it is not possible. Another switch configuration I thought of doing was .0022,.022,.0047,.047. Kind of a treble cut, bass cut scenario. Anyway, I’m just still getting duplicate tones. I thought a reconfiguration of the dual gang would do it; but, I still can’t it to do what I want. I believe it’s my misunderstanding of how an on/on/on works. I was gullible to think that 4 corner caps, ground legs twisted and run through a 1.5H inductor would allow me to roll from one side of the switch to the other; I.e., .01 to .022. I had posted this configuration with different values once before. I thought I had it figured out but do not have it figured out. I have studied the positions of an on/on/on and now don’t think it’s obtainable.
Post by angeIsbunny on Jan 10, 2020 16:59:21 GMT -5
If you break down what a Switch is, Input and 1 Output (1P1T) or 2 Outputs (1P2T) Thick Black Line is the Switch Movement and the Dashed Black Line is to show these Two Switches are Link what happens to one happens to the other How i draw a 2P2T (On/On/On) Break each pole down to X and Y within X&Y we have three states abc (On/On/On)
BTW, if this is not (yet) a finalized design, it should probably be moved to Wiring. It sounds like this started out as a finished circuit, but now you're having second thoughts? In any event, I won't move it just yet as I'll let JohnH moderate the Tone Controls section, his call on this one.