Hi folks,
What do you like for dual-gang potentiometers? I have been building my modules with PCB-mounted knobs and switches on a PCB in parallel behind the faceplate; for knobs/pots I've been using Bourns PTV09 series (e.g., PTV09A-4025F-B103 for 10k, PTV09A-4025F-B104 for 100k, or -A104 for audio taper), which have a 25mm shaft height which is a good fit for the ~10mm of faceplate thickness + board-to-faceplate offset and a Davies 1900H-style knob on top.
My current project (an LFO) needs a couple of dual-gang pots because I am generating both a square and triangle wave output and I want to be able to scale both of the output signals together. Searching on Digikey, it looks like Bourns PRS12R-4025F-103B1 will do the trick -- it's the right height, the price isn't too bad, and Digikey has a bunch of them in stock... but they only stock the 10kOhm variant. It would be optimal to have a pot with both 10kOhm and 100kOhm options commonly stocked.
Whatever I use needs to be approximately the same height (25mm overall), vertical mount, PCB mount / PC Pin or downward-facing solder lugs, reasonable cost ($1--$4 each at qty 1), and available at 10k and 100kOhm, no center detent or push-switch. I usually use flatted-D shaft (6.0mm dia), but knurled would also work.
A threaded bushing with nut is optional but appreciated, as long as it reaches > 11mm up the shaft so the nut can go on top given a PCB thickness of 1.6mm and approx 9mm standoff depth from PCB-to-back-of-faceplate. (While submini switches, etc. can be aligned via gravity to be flush under the faceplate, the board locks on the sides of pots mean they're always "pulled back" to the PCB itself when mounting.) Otherwise, sleeveless / no bushing is better than a plastic bushing.
What do you like for dual-gang potentiometers? I have been building my modules with PCB-mounted knobs and switches on a PCB in parallel behind the faceplate; for knobs/pots I've been using Bourns PTV09 series (e.g., PTV09A-4025F-B103 for 10k, PTV09A-4025F-B104 for 100k, or -A104 for audio taper), which have a 25mm shaft height which is a good fit for the ~10mm of faceplate thickness + board-to-faceplate offset and a Davies 1900H-style knob on top.
My current project (an LFO) needs a couple of dual-gang pots because I am generating both a square and triangle wave output and I want to be able to scale both of the output signals together. Searching on Digikey, it looks like Bourns PRS12R-4025F-103B1 will do the trick -- it's the right height, the price isn't too bad, and Digikey has a bunch of them in stock... but they only stock the 10kOhm variant. It would be optimal to have a pot with both 10kOhm and 100kOhm options commonly stocked.
Whatever I use needs to be approximately the same height (25mm overall), vertical mount, PCB mount / PC Pin or downward-facing solder lugs, reasonable cost ($1--$4 each at qty 1), and available at 10k and 100kOhm, no center detent or push-switch. I usually use flatted-D shaft (6.0mm dia), but knurled would also work.
A threaded bushing with nut is optional but appreciated, as long as it reaches > 11mm up the shaft so the nut can go on top given a PCB thickness of 1.6mm and approx 9mm standoff depth from PCB-to-back-of-faceplate. (While submini switches, etc. can be aligned via gravity to be flush under the faceplate, the board locks on the sides of pots mean they're always "pulled back" to the PCB itself when mounting.) Otherwise, sleeveless / no bushing is better than a plastic bushing.
Statistics: Posted by kimballa — Sat Sep 14, 2024 12:54 pm — Replies 1 — Views 66