Mystery Component

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  • gahuubard
    New Member
    • Dec 2022
    • 4
    • USA
    #1

    Mystery Component

    I've been sorting through recently acquired boxes of components that I got at the estate sale of an old-school ham radio operator. Even with my elementary level of knowledge I've been able to identify a lot of the parts (the obvious stuff). With the help of others I have most of the not-so-obvious stuff figured out. Then there's this thing. I've heard several guesses but no one seems 100% sure. Does anyone here know what this is in the attached photo?
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    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30950
      • Albion
      #2
      Re: Mystery Component

      some type of tuning coil for a resonant circuit.
      the screw at the bottom pushes a core into the center of the coil on the outside causing the inductance to change

        Comment

        • redwire
          Badcaps Legend
          • Dec 2010
          • 3900
          • Canada
          #3
          Re: Mystery Component

          These tuning inductors are pluggable, they plug into radios for use on certain bands. This one has thick winding wire so I would guess it's for a transmitter. The capacitor looks European?

          Keep an eye out for more of them, they belong to a particular ham radio. Just stuff'em in a bag when going through the estate.

            Comment

            • gahuubard
              New Member
              • Dec 2022
              • 4
              • USA
              #4
              Re: Mystery Component

              Originally posted by redwire
              These tuning inductors are pluggable, they plug into radios for use on certain bands. This one has thick winding wire so I would guess it's for a transmitter. The capacitor looks European?

              Keep an eye out for more of them, they belong to a particular ham radio. Just stuff'em in a bag when going through the estate.
              So far this is the only one I have found but I do have a little more digging to do. I have all of the identified components sorted into tubs... "Caps", "Resistors", "Transistors", etc. All of the unusual (to me at least) stuff if going in a "Misc" tub. I appreciate the info on this inductor!

                Comment

                • gahuubard
                  New Member
                  • Dec 2022
                  • 4
                  • USA
                  #5
                  Re: Mystery Component

                  Originally posted by stj
                  some type of tuning coil for a resonant circuit.
                  the screw at the bottom pushes a core into the center of the coil on the outside causing the inductance to change
                  I would like to make some measurements but from what I just read you can't really do that with a DMM. Sounds like I need to buy an LCR meter?

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30950
                      • Albion
                      #6
                      Re: Mystery Component

                      yes, and it may depend on the voltage too.

                        Comment

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