Vintage LED display, VQB76. What's the relationship between RFT and WF?

[ZY]

Apologies for not being a nixie tube here, but it's a vintage display so hopefully it fits the theme.

I have some old VQB76 LED modules with the logo WF. I see for tubes WF is associated with RFT. Is WF a brand name, or a separate company? And what does it stand for?

I'm also curious if anyone would have a datasheet for these guys. I managed to probe out a pinout, but it would be nice to have the actual datasheet.

[alex nolan]

No expert by any means, but according to https://frank.pocnet.net/brand.html WF is listed as "RFT Werk für Fernsehelektronik". It seems to be a subsidiary or branch of RFT of some kind.

[Ian Vine]

They are quite lovely

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[Jon]

We're talking about the old East Germany here, the DDR. As I understand it RFT was a large state-owned enterprise which had a number of operating subsidiaries amongst which production responsibility was divided. WF was one of these, based in Berlin at the Oberspreewerk, at least during the 1960s when it made nixies and dekatrons amongst other things. If you search German Wikipedia there's quite some background covering origins and evolution of the factory - Google Translate will help you out with the language if needed (which needless to say it was for me!).

Jon.

[ZY]

Thanks for the info everyone. I'm going to try to set up a small clock out of these.

[Wo Tu]

RFT - Rundfunk und Fernmeldetechnik

WF - Werk für Fernsehelektronik

WF was a part of RFT