I found this old device, but I don't know what it is.


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1 Answer 1


I think it's an impedance matching device for antenna.

If you have someone in your house in the past who was engaged in amateur radio and in addition, there is such a tool:  PreStel VHF/UHF Field Strength Meter  PreStel VHF/UHF Field Strength Meter

then it is most likely.

  • 1
    Ok, thank you. I don't have any other device with it, but it might be that.
    – Paa
    Dec 30, 2022 at 15:10

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