litchfield Posted August 17, 2004 Report Share Posted August 17, 2004 I want to do one, but dont know how it is wired. I assume it is a resistor wired to have a treble rolloff, perhaps a cap if that's how its done. Quote Link to comment Share on other sites More sharing options...
lovekraft Posted August 17, 2004 Report Share Posted August 17, 2004 Here ya go, Litchfield, direct from the man himself: Sweet Switch (courtesy of PRS) <edit> Sorry, computer went south on me momentarily - the mystery component in that diagram is some kind of inductor, possibly with additional caps, available only from PRS. If I can find out what's inside, I'll update you. It was originally designed to emulate the treble loss in a long cord, according to mythology at any rate. Quote Link to comment Share on other sites More sharing options...
litchfield Posted August 17, 2004 Author Report Share Posted August 17, 2004 Would it be possible to make a switch that acts as a treble rolloff, being as I wont be using a tone pot? Quote Link to comment Share on other sites More sharing options...
jammy Posted August 17, 2004 Report Share Posted August 17, 2004 Yeah, all a tone pot does is variably ground your signal throught a capacitor, so all you need to do is ground it through a capacitor via an on/off switch. All you have to do is decide on the value of the cap, any ideas guys? Quote Link to comment Share on other sites More sharing options...
litchfield Posted August 18, 2004 Author Report Share Posted August 18, 2004 I think a .22uf would work fine Quote Link to comment Share on other sites More sharing options...
lovekraft Posted August 18, 2004 Report Share Posted August 18, 2004 Probably .001 to .01 µF range, but that's just a wild guess. Caps are cheap, though, so it wouldn't be expensive to try a bunch! Quote Link to comment Share on other sites More sharing options...
litchfield Posted August 19, 2004 Author Report Share Posted August 19, 2004 yeah, $.99 for an nice assortment at rat shack. Hi, That's a good question. What PRS did back in the day was scratch off any and all markings on the resistor and cover it in foil. My guess is that, it has to be a resistor of some sort because passive electronics can only be filtered. I believe it's to be used as a mid boost by cutting the highs and lows at the same time. Just a guess, I should ask a few more people because I do get asked this from time to time. Quote Link to comment Share on other sites More sharing options...
lovekraft Posted August 19, 2004 Report Share Posted August 19, 2004 That's interesting - I figured Ed and company would know if anybody does. From the wiring diagram, my guess would be either just a cap or a cap and inductor. Too bad we can't find someone we can talk into destroying one in the interests of science. Quote Link to comment Share on other sites More sharing options...
litchfield Posted August 19, 2004 Author Report Share Posted August 19, 2004 Alan should have something for me in a few days. He is a finish and cutting man, so he doesnt know. He's been really good with answering me. Ed told me that they are optional on the quicksilvers...how the hell does that help? Quote Link to comment Share on other sites More sharing options...
lovekraft Posted August 19, 2004 Report Share Posted August 19, 2004 It's got my curiosity piqued - please let me know what you find out. Here's the best I could scrounge up: It's just a cap to ground. PRS used to use them instead of a variable tone control, got rid of them around '91 or so. Still available as a custom option, but with push/pull pots and the different switching options available these days (not to mention the improvement in their stock pickups) it's pretty useless. If you want to roll your own, start with .001uf and work your way up 'til you find a sound you like. Not much help... and no guarantee of 100% accuracy, but hopefully you can get a more definitive answer. Quote Link to comment Share on other sites More sharing options...
ansil Posted August 19, 2004 Report Share Posted August 19, 2004 well to let you know the average cable has around 220-470pf of capacitance. and the average coiled cabled had around760pf or .001uf. yeah i have measured most of my cords. and i have had 1000's. personally if you want a really cool function for a tone control or sweet switch. i usually just use a blend pot. i put the .0022uf cap on one side. and the 1mfd on the otherside with a 2.2k resistor in series. you can add any bleed cap to ground, but i have found that those who try this have more fun with the tone knobs. as one side sounds like a chunky fat tone machineand the other is a nice and bright lead chimey sound. works great on a lespaul to make it have some more quack like a strat. so effectively if you set up your amp so that the tone filter as i call it is set up a little more than 60% [in favor to the high end.] when you roll it back you might be suprised how much the guitar would speak. i know this doesnt' sound like what you are asking but it yields the same effect. without being muddy. hope that helped. Quote Link to comment Share on other sites More sharing options...
litchfield Posted September 4, 2004 Author Report Share Posted September 4, 2004 I want to be able to do it via mini switch, if I can get that function (would be perfect and versatile) like that, realizing it's always one or the other, or one off other with a 3 way, I'm on it Quote Link to comment Share on other sites More sharing options...
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