Well, a friend of mine came to my workshop with a pair of those:
They seem to be in good condition, they light up, and the mirror moves when applying current.
I have looked for infos, and so far found the manual on Kubarth's site, look for: NWDR C-B-J47B
at: http://audio.kubarth.com/rundfunk/index.cgi
I don't speak German, but I guess that those need an external amplifier named B-U 21.
I couldn't find anything about those B-U 21...
EDIT: Following Holger's suggestion, I've googled a bit and it appears that the scale -50/+5dB is typical from the German DIN PPM standard.
Anybody could point me in the right direction?
Axel
![normal_siemens_2.jpeg](https://proxy.imagearchive.com/75d/75d41f35dd764f864fbca058da104119.jpeg)
![normal_siemens_meter_1.jpeg](https://proxy.imagearchive.com/744/74493e73d5b68ea45f63155754f4320d.jpeg)
They seem to be in good condition, they light up, and the mirror moves when applying current.
I have looked for infos, and so far found the manual on Kubarth's site, look for: NWDR C-B-J47B
at: http://audio.kubarth.com/rundfunk/index.cgi
I don't speak German, but I guess that those need an external amplifier named B-U 21.
I couldn't find anything about those B-U 21...
EDIT: Following Holger's suggestion, I've googled a bit and it appears that the scale -50/+5dB is typical from the German DIN PPM standard.
Anybody could point me in the right direction?
Axel