Bypassing a tone pot?

[grolschie]

Hi guys. This is a n00b question. I have an Arion chorus pedal. It has stupid surface mounted pots. The tone pot is dying. If I wiggle it the sound cuts in and out. Unable to see similar pots in the local electronics store, I thought I'd just hardwire/bypass it. The tone pot is 100k (reads 0 - 100K on each end). Can I simply solder a bridge somewhere, or do I need to install a 50k resistor somewhere? I guess 50k is the halfway point in the tone pot..... I usually have the tone control somewhere in the middle.

thank in advance.
grol

[mcasey1]

I would probably check the wires and the wire connections for any shorts around this pot.

[grolschie]

Checked them. The pot is very loose/wooble and the goo has leaked out. Weird pot with long plastic shaft. Pot itself is mounted on the circuit board.

[mcasey1]

Goo?  That may be the problem.  Not supposed to be any "goo" in potentiometers.  Shoot some contact cleaner in.  Some pots are wobbly.

[grolschie]

Goo?  That may be the problem.  Not supposed to be any "goo" in potentiometers.  Shoot some contact cleaner in.  Some pots are wobbly.

Yup the pot is way wobblier than the other two. I have cleaned it well, and problem remains. Sound cuts out unless I press gently on the shaft. The shaft has vertical play, which the others don't. I have resoldered the connections. Problem is the pot.

Now I measured the pot at the setting that I prefer (~65k). Can I solder across the lugs of the pot somehow?

[QSQCaito]

Cut it and replace it if that's what you want to hear . It won't ruin your effect. If you do so, check if your pot is lineal(B), which is more likely to be.


Bye bye

DAC

[grolschie]

Cut it and replace it if that's what you want to hear . It won't ruin your effect. If you do so, check if your pot is lineal(B), which is more likely to be.


Bye bye

DAC

Ok, so if I remove the pot completely (because I cannot find another one), I now have 3 points that I need to jumper? The pot was 100k (50k reading on each otherside to center lug when in the middle position).

So if I remove the pot completely, do I:
a).  Use two 50k resistors to link where the two outside lugs where attached to where the center lug was attached?
b).  Jumper all 3 points together with wire.
c).  Or just leave all 3 points disconnected?

[QSQCaito]

Ok, so if I remove the pot completely (because I cannot find another one), I now have 3 points that I need to jumper? The pot was 100k (50k reading on each otherside to center lug when in the middle position).

So do I:
a).  I simply use 2x 50k resistors to link where the 2x outside lugs where attached to where the center lug was attached?
b).  Jumper all 3 points together with wire.
c).  Or just remove the pot and leave all 3 points disconnected?

You have 3 points. Which you could:

a). Solder 3 wires, and then those 3 wires to a new 100k(b) pot.
b). Use 2x 50kohms resistors, or any values(that will sum up 100k) to the position that you want.
Solder the two resistors together. Where they meet is the wiper, center leg of the pot. And then each leg of the resistor to the other 2 points.
c).If you remove the pot(I don't know that circuit exactly) but you'll probably kill your signal. Dont join them all togethher neither. Again, I can't predict what would happen because I don't know that circuit.
d).What I would personally do, if you don't play much with the tone control, replace it for a trimpot. It's small it will fit. And you can change, at some cost.. but you said you didn't use it that much.
e).Wait for other suggestion, and others' opinions.


Hope it helped

DAC

[grolschie]

Thanks for that! :-)

BTW, I removed the pot completely, and there is still a chorus sound, but the volume is real silent. I will either use two resistors or a trimpot.

Thanks again. :-)

[grolschie]

Pot removed and replaced with two 51k metal film resistors. The electronics shop that I visited had sold out of 100k trimpots!!?! Pedal sounds good. Thanks for the replies.