[time-nuts] TAPR "PulsePuppy" Pot Selection

[Mark Sims]

Another very irritating "feature" of pots is that over time the wiper can deform the resistance element.  When you go to adjust a pot (like when making a calibration adjustment on an old piece of equipment) it can be very difficult to get (and keep) the setting where you want it to be if the new setting is close to where the old, well aged, setting was.  The wiper will wind up on the deformed "slope" of the resistance element which is no longer a stable place.  Also once the wiper is moved off the deformed point the wiper may relax over time and the adjustment will drift.  You may have to replace the pot to be able to set and keep it where it needs to be.