Put a 100K resistor in series with the potenciometer wiper?

[Rod]

HI everyone.

I had a answer from a person that a solution for my problem is to put a 100K resistor in series with the wiper of the potenciometer.

By add the resistor in serires with the wiper does this mean something similar to the piture bellow, but how will i make this, if the pot is soldered to the pcb, and the tracks for the signal are printed in the pcb? board?

[DRH1958]

You will have to unsolder the center connection of the pot from the PCB and bend it out away from the pot. Then solder in one end of the 100k resistor in its place on the board. Then solder the other end of the resistor to the center lug of the pot that you unsoldered from the PCB. And yes, your picture is correct.

Edit: I guess technically, the numbering on the pot normally goes from 1 to 3 top to bottom with #3 to ground, not #1. But there are a very few situations where reverse taper like you have is used so then the numbering you have is correct for that application.

[Rod]

Well i see a lot of work ahead :-)

[DRH1958]

I suppose you could also cut the center lug so there is some length left in each direction, bend what's left of the lug attached to the pot outwards and solder the 100k resistor in between each end of where you cut. This only works if you have enough length of the center lug to work with but most amps won't have this much. And you have to consider that the closer you get to the pot, the more likely there will be damage to it due to heat transfer from soldering. You will have to be the judge if this way will work or not.

One last way would to be to buy a pot that's not PCB mounting style, remove the old pot and jumper in short pieces of wire for the 1 and 3 connections. Then just solder in the 100k resistor to connect the wiper. Make sure you keep track of the 1 and 3 connections, otherwise the pot will work backwards.

[Enzo]

Um... You know that resistor has two ends. In series means somewhere between the pot and wherever the other end goes. We established it is a circuit board, but where does it connect to? There may be a point on a single sides board where the trace goes topside through a jumper wire to another trace. Well, replace the jumper wire with the resistor, et voila. Maybe the other end has a more convenient place than the pot does. If the resistor winds up in series with a cap at the end, it is not uncommon to see a small cap and resistor series pair standing up from the board. In other words they unsoldered one end of the cap, bent it upwards, stuck a resistor down the empty hole, and twisted the fre ends of the parts together.

And I am not a fan of trace cutting, but if there is a length of pc trace long enough, you can cut a gap in it and solder the resistor across the gap. I see this most commonly where people have added a 1 ohm resistor from power tube cathode to ground.

[The Dude]

I just laid this out quick on the bench as it's hard to describe. It's another way of achieving your goal. You can insert the resistor lead in the rivet of the center tap lug, solder it, and cut the pot leg off all together. I didn't solder and cut for the pic, but hopefully you can see how it would work. Of course you'll have to bend the resistor up to get the other lead and legs into the board.