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  • Help to find Alpha Pot

    Hi,

    I need to replace a potentiometer from a Rocktron Short Timer Delay., but I can't find anything similar. Anybody can help me?

    Thanks.

    Attached Files

  • #2
    What is the resistance/ taper?
    Is that knob removeable?

    Comment


    • #3
      10Kb. No, the knob isn't removable.

      Comment


      • #4
        https://www.mouser.com/ProductDetail...r%252BfA%3D%3D
        Education is what you're left with after you have forgotten what you have learned.

        Comment


        • #5
          With all due respect, that pot has a 30mm "D" shaft and the terminal spacing is all wrong. That said, I understand (after some looking around myself) that a retrofit is the only possible solution for a repair. In my (limited) opinion a drop in replacement pot is unavailable.

          I did see that Mouser has some pots with knurled shafts that could be cut down. Though the 8mm terminal spacing for the original seems odd. Standard and close is 7.4/5mm for 12mm pots. But I wasn't able to find one with a 10kB value, long knurled shaft and vertical mount pins.

          This ones a corker to be sure. Definitely a retrofit and a fake it till you make it situation.
          "Take two placebos, works twice as well." Enzo

          "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

          "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

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          • #6
            I tend not to worry about the shaft. A D shaft can be filled with a piece fo dowel or other debris. It is also possible parts from the old pot might be used to modify.

            WOuldn't be the first time I snipped off or bent over the solder pins and stuck bits of wire on the legs to mate with hole on the pcb.
            Education is what you're left with after you have forgotten what you have learned.

            Comment


            • #7
              IF at all possible, Id try to match pinout first , simply to make life simpler, and second match body size, although "if it fits in available space its close enough"

              Shaft dimensions would take a distant third place, although it does not hurt, of course.

              I was amazed at NOT finding a close replacement at Mouser, since 12/13 mm body is one of available sizes (probably based around 1/2" body size)

              Sadly for us, manufacturers have deep pockets and large orders to lure component suppliers so they can order anything they fancy which is NOT readily available over the counter.
              Juan Manuel Fahey

              Comment


              • #8
                Originally posted by Enzo View Post
                I tend not to worry about the shaft. A D shaft can be filled with a piece fo dowel or other debris. It is also possible parts from the old pot might be used to modify.
                There is often not much force required to turn the pot either. So it's fairly easy to fab something up. I'll even cut back the new, cut off a piece of the old shaft, and join them with a piece of heatshrink.

                "Everything is better with a tube. I have a customer with an all-tube pacemaker. His heartbeat is steady, reassuring and dependable, not like a modern heartbeat. And if it goes wrong he can fix it himself. You can't do that with SMD." - Mick Bailey

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                • #9
                  I found this one:

                  https://www.arrow.com/en/products/p1...120PK-Y25BR10K

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