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Post by frets on Nov 16, 2020 21:04:05 GMT -5
Hey Fellers, I thought this would be fun. I’m wiring a Series Push-Pull - haven’t hooked up the pup yet. But before I do, what else special is on this pot? If you know, you’re a real Guitarnutz.
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Post by Yogi B on Nov 16, 2020 21:28:49 GMT -5
green-orange-brown-purple
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Post by sumgai on Nov 16, 2020 21:57:37 GMT -5
DPDT on a two wafer assembly..... Unknown whether it's a concentric or dual gang.
The resistor starts with Green, which is 5. The second band is missing, the third band is Yellow, or 4, and the fourth band is Gold, so the tolerance is 5%. Given the standard values table for 10% coverage, it's likely a 560KΩ.
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Post by frets on Nov 17, 2020 0:55:36 GMT -5
Yogi and Sumgai, Hints - - It is a Dual Gang Push Pull. - The resistor is a 150k - If you look at the top view, you’ll see something special between lugs 2 and 3 - You’ve seen this before, but not in this form.
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Post by b4nj0 on Nov 17, 2020 3:50:41 GMT -5
Looks like an SMD capacitor Frets.
e&oe ...
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Post by newey on Nov 17, 2020 6:59:49 GMT -5
Schottky diode for passive distortion, perhaps? But, if so, we have seen that here before . . .
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Post by Yogi B on Nov 17, 2020 7:01:25 GMT -5
Yogi and Sumgai, Hints... Who said anything about needing hints? Not I. And despite not paying close enough attention to the second photo to notice the brown band on the far side of the resistor (which, admittedly, is only just visible), neither did JohnH sumgai.
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Post by frets on Nov 17, 2020 11:54:24 GMT -5
Newey, No, but a good guess given my interest in finding the perfect diode combination (which I have, Ha!!). - It made its debut in 2013; - B4nj0 got the one component right - I assume our most prestigious member knows right now what it is.
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Post by sumgai on Nov 17, 2020 13:14:29 GMT -5
If this "mysterious" component is indeed a capacitor, then we're looking at a treble bleed with a variable resistor (the second wafer). Different layout because of the SMD, but we've seen this idea before.
sumgai
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tedminion
Rookie Solder Flinger
I'm nearly wiped out
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Post by tedminion on Nov 17, 2020 14:08:02 GMT -5
- I assume our most prestigious member knows right now what it is. Thanx fer thinkin bout me but I dunno what dat is!
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Post by newey on Nov 17, 2020 14:48:22 GMT -5
Oh, Gawd! Now TIIMH . . .
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Post by frets on Nov 17, 2020 15:39:03 GMT -5
Sumgai😽, You’re very warm. In the church, but in the wrong pew. Tedminion, we love you; but, I’m sorry, you’re not the “One” I’m not going to drag this out much longer, I am working on a diagram for you guys. It will reveal the solution. Where’s Retread? Has Ash chimed in yet, I can’t remember?
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tedminion
Rookie Solder Flinger
I'm nearly wiped out
Posts: 4
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Post by tedminion on Nov 17, 2020 16:49:12 GMT -5
He mus b round here sumwher.
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Post by sumgai on Nov 18, 2020 10:43:39 GMT -5
Lower right corner, about 10% along the bottom from the corner.... the guy with the tin-foil hat... that's him!
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Post by ashcatlt on Nov 18, 2020 12:37:50 GMT -5
I mean you can call it what you want, but sumgai is right about what it’s gonna do. It’s a low shelf filter with broadband attenuation. If it’s ganged, those functions are linked. If it’s stacked, they’re somewhat separated.
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Post by frets on Nov 18, 2020 13:49:37 GMT -5
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Post by sumgai on Nov 18, 2020 15:08:48 GMT -5
I'd say that ash and I were/are correct, a TB with a variable resistor added, to make a "Type D" TB, as per John in this thread: A better treble bleed circuitAs seen therein, the variability means a finer degree of control over the curve (treble reduction versus volume reduction). For most, this is probably a good thing, even if a bit more complex, as well as a bit more costly to implement. Again, where you differed was in using an SMD for the cap. Nice idea, but how many "Sunday hobbyist" modders do you know that have these things on hand, or can get them easily and cheaply? Not to mention the tools required to do this correctly (meaning, without damaging them)? I don't fault you for using what you've got, but others who don't see these kinds of things quite so often, they will be scratching their collective head for some time to come. Still and all..... Oh, and one other thing I noticed: you don't use both pole upper terminals (as drawn) for the series connection. This is a "best practice" to reduce the number of possible points of failure. Good going! HTH sumgai
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Post by JohnH on Nov 18, 2020 15:44:20 GMT -5
Well there it is! Hello little volume pot!
Id love to know if you find that it works as expected. I never tried it myself, once I'd homed in on the right values for the simple parallel version. But it should be just a little bit better.
Feel free to to spin beguiling marketing spiel and sell for a price reflective of aspirational expectations.
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Post by frets on Nov 18, 2020 16:15:13 GMT -5
John, It works fantastic. The roll off is superior in my opinion. I’m impressed with it.
Sumgai, You’re right, I realize the hobbyist probably doesn’t know what a dual gang push pull is. But, I just thought it would be fun to see if any of you guys noticed John’s Clear Tone Volume; and, hey, a lot of the posts are complicated on the forum. I really just did it to entertain. It’s going in a Swamp HHH Strat with an Eastern Black Walnut Neck with Jatoba Fretboard, Babicz Bridge, Fender American Tuners, Seymour Duncan’s. Haven’t figured out what I’ll do with the other two controls. The middle pickup is a hot rail and it will get the series. II sometimes wire Series like this but typically use the other way, I was just rolling ya know. Wasn’t thinking, it’s going to stay like it is. I got to move on to finishing it. Momma needs new shoes.👠👠
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Post by Yogi B on Nov 18, 2020 17:33:21 GMT -5
Again, where you differed was in using an SMD for the cap. Nice idea, but how many "Sunday hobbyist" modders do you know that have these things on hand, or can get them easily and cheaply? Not to mention the tools required to do this correctly (meaning, without damaging them)? I don't fault you for using what you've got, but others who don't see these kinds of things quite so often, they will be scratching their collective head for some time to come. I have a feeling you won't like the overkill 'helper' PCBs I'm thinking of getting made for my (Tokai) LP as and when that happens. OTOH of the three SMD pads I'm only actually planning to populate the the switch, not CT or CB. I forgot that was the other name for it -- I've been trying to come up with anagrams for "a better treble bleed circuit", the best I had was "barbed electric tree-lute bit".
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Post by frets on Nov 18, 2020 19:19:39 GMT -5
Yogi, I love the Pcb, it’s fantastic.
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Post by sumgai on Nov 18, 2020 23:19:18 GMT -5
Hey you two..... Don't get me wrong, I love to see people experiment and come up with off-the-wall solutions to design issues. Just because I don't do this myself any more, that only means that I'm getting old and crochety, not unappreciative of the efforts of others. IOW, the K.I.S.S. principle is 180° from the First Law of G-Nuts, and I just have to accept that little factoid in my life. Remember, this is just my opinion. (But for a small fee, it can be yours too!)sumgai
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