Foot Pedal 47k Vs 50k Potentiometer ?

[Rambozo]

As you can see 47K isn't all that common. For something like this the 50K should be fine, but if you want to turn your 50K into a 47K it's easy to do, just parallel a 750K or 800K fixed resistor across it and bingo one 47K pot.
In case you are curious the formula for resistors in parallel is (R1*R2)/(R1+R2)

[Kempy]

As you can see 47K isn't all that common. For something like this the 50K should be fine, but if you want to turn your 50K into a 47K it's easy to do, just parallel a 750K or 800K fixed resistor across it and bingo one 47K pot.
In case you are curious the formula for resistors in parallel is (R1*R2)/(R1+R2)

I tried a 50K pot and it gave me max. amps but not low end amps just 20A and 251A at max. put 47K in and got 6 amps low end and 252A top end. But did not try 750K resistor maybe next time.