What is this ?

[Euronymous]

Hello

A friend of mine has this item in his collection for many years but he would like to know what it is exactly.

[Svenpanzer]

doppel gleichwechselrichter

best regards Sven

[rv12p2000]

Hello Euronymous

You have some information about this in this document written by funksammler :

https://www.dropbox.com/s/20vql0l3rc...ition.pdf?dl=0


see page 114 and 115

Regards
Rv12p2000

[kabel]

This unit is en electromechanical inverter. From power you get out ringer current to e.g. a switchboard. When the switchboard has a sudden traffic, it is to good for the operator(s) to not have to crank for ringing.

The output should be close to 25 Hz and probably 60-90V.

I have one civilian of unknown make mounted on a marble plate. Worked without maintenance when I tested it.

Kabel

[Euronymous]

Thanks guys for the informations. I am very sorry but I don't understand the use of this unit ... Could you explain briefly ? It was used for phone ?

[Alperator]

Look here:

http://der-fernmelder.de/geraete-der...ler-polwender/

Best regards
Albert

[csmagdo]

Polwechsler

Briefly: makes AC from DC. When someone was sitting at a Klappenschrank (phone exchange), she/he had to crank a lot to ring the desired parties. Instead of that, she/he just had to push a button.

In the link of Alperator you can see a YT video of my working sample.

Regs: Csaba
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Thanks guys for the informations. I am very sorry but I don't understand the use of this unit ... Could you explain briefly ? It was used for phone ?

[Euronymous]

Many thanks for the explanations guys

Is it a rare item and what is the value ?

[csmagdo]

Relatively rare. Fix the issues on it (missing screw, window, upside-down plate, ...).
I see them running between €100-200.
What is the production year? The photo is too fuzzy...

Csaba

[Euronymous]

Relatively rare. Fix the issues on it (missing screw, window, upside-down plate, ...).
I see them running between €100-200.
What is the production year? The photo is too fuzzy...

Csaba

It's from 1938.