Potentiometer Short

Started by soupbone, October 18, 2011, 05:01:03 AM

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soupbone

I have a Hardwire TL-2 Metal Distortion.It sounds pretty good,but i HATE the mid frequency knobs.It makes the pedal sound too much like a Boss Metal Zone.I tried to de-solder it from the board(It's a dual ganged pot),but I'm having a heck of a time getting out of there because the holes are so small.I'm real affraid that I'm going to burn up the lands.Is there some way to "short" the dual-gang pot's out?Maybe soldering a wire across a couple of the pins of the pot?I'm lost at this point. ???

anchovie

Do you have a schematic, so that you can accurately say what the pots do in the circuit? Removing the pot will make the relevant points in the circuit open and may not actually be what you want. Shorting pairs/all three pins on each gang is something you can do with a soldering iron and clippings of resistor legs, is unlikely to destroy the pedal and can easily be reversed. If you don't have a diagram, it's time to experiment!
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petemoore

#2
  Mini-testclips on a wire...connect two points quickly.
 Mini-testclips on a resistor, jumpers resistances.
 A batch of testclips on wires/resistors...jumper, introduce parallel R's etc.
  Any other smaller stuff can be jumpered with a de-insulated, pre-tinned wire, pre-tin where it's going to be soldered to also, in this way the freshly re-heated tinned wire can help the soldering iron 'quick-weld'...instead of heating all of the joint at the board, having the iron and wire end already hot can make a good heat-through of the component lead...hopefull before the heat transfers through to to bottom of the board [ie 'tacking' a part above the board to available component leads [when available].
 "Which way doesn't the pot go far enough ?"..if there's a 'past the pot R range' setting that is preferred, a stop resistor [adds resistance to the "Variable Resistor = wiper and outside lug of a Pot"] or a tapering resistor [across 2 of the potlugs], or even re-tapering the resistive divider [a resistor from wiper to each outside potlug].
 Maybe even a larger value pot ?
  If the pot has lugs you can see, the wires could be lifted or a 'cut 'n splice-in' could place a stop resistor between the pot and the board.
  Caveats I'm aware of: it's usually tight inside the Boss pedals so space and access can make them tricky to do work in, unless 'advanced understanding' is applied [the sound when tried with a wire loose, for instance] it's generally prudent to leave the circuit 'map' intact...for instance some tone controls are -in- the signal path.
 
Convention creates following, following creates convention.

soupbone

Cool!Thanks guys for the ideas!I tried "shorting" the outside 2 lugs of the pots and it didn't really sound that great.Probably has to do with how the pedal is designed. :icon_cry: