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Post by frets on Jan 7, 2020 22:11:02 GMT -5
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.  |
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Post by Deleted on Jan 10, 2020 13:35:18 GMT -5
i am guessing the INPUT to the pot is on the LOWER wafer Arm (lug2)
as for how a On/On/On works
10nF & 22nF
10nF & 100nF
47nF & 100nF
or
10nF & 22nF
47nF & 22nF
47nF & 100nF
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Post by frets on Jan 10, 2020 13:56:06 GMT -5
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.
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Post by Deleted 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) |
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Post by Deleted on Jan 10, 2020 19:49:40 GMT -5
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Post by frets on Jan 10, 2020 20:16:56 GMT -5
Okay, your diagram explains it to me. What’s funny is I have those little rotary switches sitting in one of my parts cases. I have 4 ways, 5 ways and 8 ways. They’re dinky.
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Post by newey on Jan 12, 2020 9:55:51 GMT -5
frets- I don't know if you had read this previously or not, but it may be helpful to your quest. ChrisK's "Free Woman Tone"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. |
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Post by frets on Jan 12, 2020 14:27:11 GMT -5
Newey,
First, thank you for posting this and helping me out so many times. I had found this diagram on the internet and made it. I can attest that it does work.
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Post by Deleted on Jan 12, 2020 14:28:37 GMT -5
i did make the S-Type Switch select 10,15,22,32 & 47nF from 3 Caps
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Post by frets on Jan 12, 2020 16:46:09 GMT -5
Bunny,
I’ve never used an S-1 before. How did you configure the 3 caps to produce 5 tones? How did the series look like on that one?
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Post by Deleted on Jan 12, 2020 18:05:32 GMT -5
S1 is a 4P2T built with a pot
S-type is a cheap Stratocaster switch
Using 10n , 22n and 47n
10n
1/((1/22)+(1/47)) =15n
22n
10+22 =32n
47n
11XY88
12XY78
2XY7
32XY76
33XY77
Very rough way to look at the PCB in a s-type
Few cuts (Maybe I should be called the bunny of a 1000 cuts)
11XY00
12XY78
2XY7
02XY00
33XY66
0 being the tracks that are cut out
1 not connected
22nF to 2 and 7
47nF to 3 input
X to ground
Y to input
10nF to 6 and 8
As I'm move away from the five way switches I need to reuse the space
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Post by frets on Jan 12, 2020 18:49:02 GMT -5
Oh geez, it’s a 5-Way switch, I didn’t even think of that. Thanks Bunny of Cuts.
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