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?
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31003
    • 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
      • 3906
      • 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
            • 31003
            • Albion

            #6
            Re: Mystery Component

            yes, and it may depend on the voltage too.

            Comment

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