Because all the segments are in the same plane, it is possible that they could all get deposits equally, so increasing the current may work. Yes, the current is controlled by a resistor. The documentation I linked you to gives the recommended current for each segment. To try to re-condition the segments I would double the current, but I would only do that with the affected tubes.
These tubes are known for having a low yield so it is possible that the affected tubes have other problems, such as outgassing. I would be very careful when removing them from any socket they may be in to avoid breaking a seal between the pin and the tube. On Monday, November 13, 2023 at 4:22:00 PM UTC-5 Magnedyne wrote: > > Furthermore I should mention that the partial glow does not affect only > specific elements of the tube but any element inside the tube. > Can this be caused by deposits? > Nicholas Stock schrieb am Montag, 13. November 2023 um 21:56:10 UTC+1: > >> WHAT A FIND!!! OMG. I didn't even know there were smaller versions of the >> ZM1350 (shame on me!). >> >> The tubes with the partially lit segments can probably be revived with a >> little extra current... just be careful not to burn them during the healing >> process (if it works..). >> >> Wow.. >> >> Welcome to the group, >> >> Nick >> >> On Mon, Nov 13, 2023 at 12:07 PM Magnedyne <miro.s...@airgrips.de> wrote: >> >>> Well, this serves as my introduction and and as a thread about a >>> beautiful sign I just picked up. >>> Firstly something about myself. >>> I’m a 17 year old collector and (hobby) historian of vintage computers, >>> my interests are mainly minis, mainframes, early micros and kit/diy >>> computers. But I’ve got a few other different bits and bobs throughout the >>> history of technology as well. >>> Now back to the reason I joined this group. >>> I came across an absolutely beautiful Telefunken advertising sign for >>> the, frankly underdocumented, Telefunken Varisymbol tubes. They were >>> Telefunkens response to the Burroughs 7971 alphanumerical tubes. These were >>> only sold for a very brief amount of time and exclusively in Europe. >>> Interestingly these are flat like panaplex tubes and the anode is not a >>> grid, but a coating on the inside of the tube. These are the earliest gas >>> discharge tubes, well the ones I’m aware of anyhow, which used such a >>> coating. >>> The sign is a handmade one off which was lugged around to fairs to >>> advertise the Varisymbol to potential Customers. It implements all three >>> sizes of the Varisymbol ZM1350 ZM1360 & ZM1370. It can alternate between >>> „TELEFUNKEN“ and „VARISYMBOL“ at four different speeds. Switching between >>> the sign reading „TELEFUNKEN“ three times, then „VARISYMBOL“ three times >>> and the sign reading „TELEFUNKEN VARISYMBOL TELEFUNKEN“/ „VARISYMBOL >>> TELEFUNKEN VARISYMBOL“ is possible as well. Unfortunately three tubes >>> don’t display quite properly. I’m hoping it’s just the electronics, I >>> haven’t had time for a detailed diagnosis yet. Even if it’s the tubes, it >>> seems to be the most common type at least, the ZM1350 which seems to have >>> popped up most often in the past. >>> Any further info about the Varisymbol is greatly appreciated. >>> Cheers, >>> Magnedyne >>> [image: IMG_0026.jpeg] >>> >>> [image: IMG_0025.jpeg] >>> [image: IMG_0021.jpeg] >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "neonixie-l" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to neonixie-l+...@googlegroups.com. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/20e32d2c-3ac1-4656-b532-77b22f6a35f1n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/20e32d2c-3ac1-4656-b532-77b22f6a35f1n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/567e39b7-7734-4e35-b77e-c86f7f54a81en%40googlegroups.com.
