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Field telephone UNA-F-31

Article about: Some time ago I bought a field telephone UNA-F-31 (Телефонный аппарат УН

  1. #1

    Default Field telephone UNA-F-31

    Some time ago I bought a field telephone UNA-F-31 (Телефонный аппарат УНА-Ф-31).
    See also; Телефонный аппарат УНА-Ф-31 .
    A remarkable piece of Soviet-Russian military technology from the 1930s. The phone is in good condition, has been checked and it can work!
    Unfortunately the microphone is missing in the handset.
    Who can tell me which type of microphone belongs in the handset? Is it the same microphone that is used in the UNA-F-28 and the UNA-F-42 field telephones?

    Field telephone UNA-F-31

    Field telephone UNA-F-31

    Field telephone UNA-F-31

    Field telephone UNA-F-31

    On the inside of the cover is a label of the circuit diagram of the telephone. Unfortunately this is also missing.

    Field telephone UNA-F-31

    Who can tell me what kind of microphone belongs in the handset and where to find one? Where to get a label of the circuit diagram? A high-quality scan of the circuit diagram is also allowed.

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  3. #2


    Internet thinks this phone needs an MB-5 (МБ-5)

    The ones for TAI-43s look to be similar in size. Probably inexpensive to source one and try?

    TAI-43 takes the MK-10 or МК-16У. Good luck!

    Field telephone UNA-F-31

  4. #3

    Default Field telephone microphone

    Thanks for your reply.
    I will search on the internet if I can order these microphones somewhere.

  5. #4


    I do not know if the size is the same, if so a microphone from an american T17 microphone ( used in WW2 and easily found) could be used.
    The technical type of mike is a " cole microphone"
    Hope this helps you.

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