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