Romanian army headphones ? WW2?

Hello,

I have this set of romanian headphones... They came with a green canvas pouch. They have 2 screws on the back of each earphone where the wires come... I connected the wires to them and thew still work, I listened winamp with them , although they are unconfortable to wear. On the back they are marked:
S2
2200 OHMI
UEM (the UEM "round" logo)

I have a few questions regarding them. First, are they post-WW2 or WW2 issue? What were they used for? Infantery squad radios, tank radios or aircraft radios? And regarding the pouch - does it belongs to the headphones kit? Or is just a pouch from something different (if so, what? ) used to carry the phones?


Thanks.

I have also, in Bucharest, at least one pair. If I remember right, during childhood-teenage years I gave about 2 pairs to my colleagues/friends. Oh, yes, they still work... In some ways, they are better than the commercial crap around.

Romania had some electrotechnics/electromechanical/electronics industry before 1944. However, I do not think we made headphones before 1944. I suggest we imported them, from "the Ally of the day".
But I am not an authority in the field.

This post has been edited by Florin on May 07, 2005 01:32 am

The reasons for that type of headphones to be better than the usual commercial headphones is their high impedance. This has some advantages. With such headphones you can built a radio able to work without batteries (using just the energy of the electromagnetic waves, around us in the air). They also "eat" less energy from the radios with batteries, but today batteries are available at affordable price, so this should not matter too much.

The sad thing with these headphones is that they are not as good as when they were made.

The membrane which produce the sound is a very thin steel sheet. That steel membrane get rusty if the headphones were in humid environment.
But even if the environment was excelent for conservation, the qualities are not the original ones. Because inside there are too little permanent magnets.
The magnetization of any permanent magnet decreases in time.
Because of that, any old device incorporating permanent magnets will not behave as in the moment of fabrication. This is true for little DC motors, magnetoelectric analogic measuring apparata, loudspeakers, dynamos etc.
For "Von Maybach": If you are curious to look inside, you can rotate the flat plastic surface in contact with the ear. Rotating it unfasten it out. Then you can take the steel membrane out, because it is not glued. You'll see 2 little coils inside.
Enjoy!

This post has been edited by Florin on May 08, 2005 05:59 am

my guess is that they belong to a campaign phone wich hasn`t any receiver ( maybe from a german Enigma)