Rare Russian special color VFD tubes

[jb-electronics]

Hey folks,

Have you seen these VFD tubes on Ebay? http://www.ebay.com/itm/223200328320

It looks like a quite rare find, I have never seen those before.

Best wishes
Jens

[John Snow]

Interesting. Different phosphor coatings?

[jb-electronics]

I think so, they must be some experimental lab samples, I have never seen these in more than ten years. Jens

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[Дмитрий Шевченко]

Yes, this is the Saratov Factory samples.
In 1990, they tried to apply different phosphors. So, at now time
Saratov's Factory are destroyed.
You can look at the different exhaust tube in comparison with the usual green.

P.S.
I also pumped different gases in IN-18 in Russia.
https://radiokot.ru/forum/viewtopic.php?f=17&t=153883&view=previous
ср, 24 окт. 2018 г. в 19:50, jb-electronics <webm...@jb-electronics.de>:

> To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/64b7f556-aff2-06a5-fba2-613b75fa21b1%40jb-electronics.de.

[Vlad Shmit]

I remember seeing blue ones when I was 15 or 16 yo (almost 20 years ago). It was quite impressive looking VFD displays for that days.