ekso
Rookie Solder Flinger
Posts: 3
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Post by ekso on Apr 27, 2009 5:04:37 GMT -5
This is my first mod that uses coil tapping. It's geared toward larger body les paul or double cut guitars. It uses 2 DPDT on-off-on switches to change designated pickup from Humbucking >off > Coiltap north, a 3 way gibson style selector switch, a SPST on/off switch and independant voume and tone knobs... Great for you switch freaks and a nice way to have fast tone change contol on stage and in the studio. I call it the 4 'n 4 (four switches, four knobs... simple enough eh?) Enjoy... or don't lol, either way, i had fun during the process of learning and wiring.
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Post by newey on Apr 27, 2009 5:55:35 GMT -5
ekso-
Hello and Welcome!
Nice job! However, while usually I'm admonishing folks to downsize their diagrams, yours could be a bit bigger so people don't have to "click through" to read it.
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ekso
Rookie Solder Flinger
Posts: 3
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Post by ekso on Apr 27, 2009 6:27:21 GMT -5
thanks. sorry its probably too big now, but im using image shack and have no idea how to get a mid sized thumbnail
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Post by wolf on Apr 27, 2009 20:56:45 GMT -5
Welcome to the board eksoI tried redrawing your diagram with possibly the cheapest graphics program in existence - MS Paint. And it looks like this: Yes, it loses a lot of sharpness and the colors aren't as bright but it fits a little better huh? Anyway, nice guitar modification.
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Post by sumgai on Apr 28, 2009 1:17:54 GMT -5
ekso, First, welcome to the NutzHouse! ;D Second, when you finalize your drawing, regardless of what program you use, you have to set the number of pixels for the width and height. There is no "standard" program we recommend, so I won't give you an exact method, but if you need help with this, then just ask. Be sure to tell us what you're using though. Normally, we'd like to see the maximum width at about 800 pixels or so. Most viewers here have screens at least 1024 pixels wide, but that column to the left with names takes up nearly 180 pixels..... Third, I hate to be the party-pooper here, but what do you think the effect will be when you rotate either of those pots that aren't labeled, but are obviously not tone controls? Methinks there's a wire or two gone AWOL.... Otherwise, I'm with wolf, nice job. HTH sumgai
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ekso
Rookie Solder Flinger
Posts: 3
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Post by ekso on Apr 28, 2009 8:42:29 GMT -5
not labeled? It's a standard 500k pot. The job of a pot is to slowly cut the signal running thru it. In this case the Volume will be affected... It shouldn't have to be labled. No wires missing. I have this working peachy keen on an Ibanez GAX75 and thanks.
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Post by ChrisK on Apr 28, 2009 13:35:26 GMT -5
Hi, welcome a'board. What sumgai is alluding to by "unlabeled" is not that they're unlabeled, but that there may be issues with the pots that happen to be unlabeled, and are not the two that are obviously tone pots. Issues: 1. Both volume pots are connected as rheostats (two-terminal variable resistances). As a result, they are not ratio-metric volume controls (as traditionally done) but are series resistances (where no pickup can be turned all the way off in the "both" selection). This has some advantage in that no volume control all the way down (up from the perspective of maximum resistance) can shunt the other pickup's signal to ground (grounded ain't). Also, if audio taper pots are used, the lower half of their rotation will be less than significant in series effect. Traditional volume potentiometer (three-terminal ratio-metric) controls have one terminal connected to signal ground. 2. The controls are drawn symmetrically/mirrored. While it looks good, the rotation of two of them will be backwards, if each is the (unspecified) bottom view of said controls. There are (unfortunately) many folk that have to wire exactly as shown as they are oblivious to the actual magic afoot within electronic components. To them, exactness is everything. 3. The use of DPDT center-OFF switches causes dead positions in the selection scheme. This can be embarrassing in real-time. Since one pole of each DPDT switch selects the same thing in either end position, it is redundant and the DPDT switch can be replaced with a SPST switch that solely shorts a coil, since this is all that the switch actually does anyway. Having center-OFF switches and a SP3T Center-ON LP selector switch effects the same thing, either the center-OFF positions on the intra-pickup switches are redundant or the the SP3T Center-ON LP selector switch is redundant. If the DPDT center-OFF switch is replaced with a DP3T center-ON switch (a.k.a. the DPDT ON-ON-ON switch), each pickup could then be selected intra-pickup as series coils/single coil/parallel coils, which is the typically traditional way.
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