CoValent
Member
- Messages
- 155
- Location
- Limerick, Ireland
The pot you link to is Log, I'm 99.99999999% sure you need a linear one as in your 2nd link.
It would be wise to check the resistance of the original pot before ordering a new one.
Putting a 51k resistor (if you can get one) in parallel with a 50k pot will give about 25k across the outside terminals, and I don't think the resulting "potentiometer" will be linear, even with a linear pot.
edit to add: I linked to the wrong advert. The same seller has a 1M linear pot with DPDT switch, which is the one I intended to show.
No, there's a dodge in play here. If you plot the performance a fixed resistor in parallel with a linear pot, you get a trace resembling a log pot. If you use a fixed resistor in parallel with a log pot wired backwards, you get an almost linear resistance behaviour, depending on the ratio of the two resistances. Try it, you'll see what I mean.