esppse Posted June 10, 2012 Report Share Posted June 10, 2012 Im trying to put a behringer spectrum pedal into my guitar. I want to use this http://www.parts-express.com/pe/showdetl.cfm?Partnumber=023-120&utm_source=googleps for two things. First, i want to use the potentiometer to control one of these pots. http://img221.imageshack.us/img221/4240/pict6978.jpg http://img13.imageshack.us/img13/2618/pict6977.jpg Second, i want to use the push pull to control the on and off of this pedal http://img441.imageshack.us/img441/631/pict6974.jpg http://img526.imageshack.us/img526/6012/pict6971e.jpg Does anyone know how to solder the pot so that it can control this pedal in this way? Thanks! -Henry Quote Link to comment Share on other sites More sharing options...
Ripthorn Posted June 10, 2012 Report Share Posted June 10, 2012 Well, things don't look very good for item number 1. From the fuzzy pictures, the pots appear to be dual gang, plus there is no resistance rating on them. Second, soldering into a surface mount board is really not recommended unless you have some mad skills. As for using the dpdt switch to control it, you simply leave the control always on (as far as the pedal is concerned) and then wire up the entire pedal circuit in true bypass. Good luck! 1 Quote Link to comment Share on other sites More sharing options...
esppse Posted June 11, 2012 Author Report Share Posted June 11, 2012 thanks for your help, but there really is nothing i can do for the first scenario? there has to be a way! :'( Quote Link to comment Share on other sites More sharing options...
esppse Posted June 11, 2012 Author Report Share Posted June 11, 2012 i just realized a big problem with the on off scenario. when i unplug the cable, the led indicator is still on and wont turn off unless the button on the pedal circuit is pushed. this will consume the battery after a day right? and when i replace the battery, i have to open the whole pickguard where the circuit is stored to press the button to activate the circuit. (because it gets deactivated when the battery is pulled out.) should i remove the button from the circuit board and solder the dpdt to where is was? Quote Link to comment Share on other sites More sharing options...
Ripthorn Posted June 11, 2012 Report Share Posted June 11, 2012 Usually those little contact switches are not dpdt. That means you can't just solder your switch in there. You could clip the LED so that it doesn't draw any current, but the typical way of wiring things like this is to use a stereo output jack and wire up the ground of the battery so that it is open when the guitar cord is unplugged. That makes it so that no power is supplied to the circuit when the guitar is unplugged. That is how all active pickup guitars are wired. As for the first item, if those are dual gang pots, you would need a separate dpdt switch and dual gang pot, as I don't think they make dual gang push pull pots. So in short, no, there is nothing you can do with that push pull pot to control the circuit. Quote Link to comment Share on other sites More sharing options...
esppse Posted June 11, 2012 Author Report Share Posted June 11, 2012 Ah that's a dillema. I think I have a solution. Tell me it you Think this is ok. I'll use a separate dpdt for the true bypass on off. And ill desolder one of those pots to extend its leads and mount that pot directly on the pickguard. Right? Quote Link to comment Share on other sites More sharing options...
Ripthorn Posted June 12, 2012 Report Share Posted June 12, 2012 That could be done. Just be extremely careful desoldering the pot from the board, as you could damage a trace or smd component easily. Quote Link to comment Share on other sites More sharing options...
ansil Posted June 25, 2012 Report Share Posted June 25, 2012 there are other options they make special pots with push pull on them and they can be double and triple ganged pots http://www.mec-pickups.de/englisch/pages/09_pots/index.htm Quote Link to comment Share on other sites More sharing options...
esppse Posted July 20, 2012 Author Report Share Posted July 20, 2012 (edited) Hello again, I managed to desolder the pot from the behringer pedal and extended its leads so it could fit on the pickguard. The on off is being controlled by a flip switch now. however i am having trouble mounting it because it doesnt have a screwing thingy on the pot. Under the pot it says B100k. The pedal's pot has 6 leads. 4 are linked (i think. when i use the multimeter, those 4 show numbers on the meter when they touch together.), 1 goes to ground, and 1 goes to its own thing. Is this a dual gang pot? (sorry for the bad phone quality) http://imageshack.us...1/wp000433.jpg/ http://imageshack.us.../wp000431u.jpg/ http://imageshack.us...9/wp000427.jpg/ I just bought one of these i thought i could replace it with. http://www.ebay.com/...=item3cc17de7fd How would i replace that pot with the one i just bought? Please help me guys! Thanks -Henry Edited July 20, 2012 by esppse Quote Link to comment Share on other sites More sharing options...
Mender Posted July 21, 2012 Report Share Posted July 21, 2012 The pot you removed from the circuit is a dual gang pot, but instead of having two separate pots controlled from a single spindle (like your new pot), it is a single slice of board with a track on each side, which makes it much less bulky. You can replace it with the new one you have bought, but you would have to work out on the old pot which pin does what. There are three pins for the top track and three for the bottom track. These will correspond to the two separate pot assemblies on your new control. To work it out with your meter, you need to remove all the wires from the old pot, marking each one so you know which wire went to which pin. Now use your meter on the pins to find which two are the two wiper connectors and which of the others go to he track on the appropriate side. Much more difficult to describe than to actually do it lol. Quote Link to comment Share on other sites More sharing options...
esppse Posted July 23, 2012 Author Report Share Posted July 23, 2012 wait how do i find out which are the wiper connections? Quote Link to comment Share on other sites More sharing options...
Mender Posted July 23, 2012 Report Share Posted July 23, 2012 On the old control, measure any two pins and find which two pairs will give you about 100k reading each pair. These are the track connections. The remaining two pins will be the wipers. Now measure one of these pins against either pair of track pins. If you get a reading, that pin is the wiper for that pair of track pins. Obviously, the remaining pin will be the wiper for the other pair of track pins. On the new control, the centre pin of each three is the wiper Quote Link to comment Share on other sites More sharing options...
ansil Posted July 23, 2012 Report Share Posted July 23, 2012 you could also use the original boss schematic to get you through this since its a clone of it http://www.freeinfosociety.com/media/images/4075.jpg most of the clone stuff is dead nuts on Quote Link to comment Share on other sites More sharing options...
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