Have you tried the last circuit in the datasheet above (https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f4566168ede3e5edceb395e/1598383652854/439A.pdf) which uses an RC-network on each cathode?
I've not tried this on a 6167 but on some other older types it is necessary to get them to run properly and I've also tested it on other types when I've had problem (or no data) getting them to run and in some cases I have succeeded to get them to run well enough that they later started to run in a normal circuit. /Martin On Tuesday, 1 March 2022 at 15:26:17 UTC+1 Paolo Cravero wrote: > Hello. > I still cannot get these WE6167 spin uniformly. I might have stray > capacitances on the breadboard, but I won't invest in a spinner PCB with > this huge doubt. I do have some findings and thoughts to share. > > The 10 output cathodes can be used to control the glow of each dot since > they do illuminate like a Nixie with a 200-230V anode voltage at 1-3 mA. > Actually there are eleven cathodes as there is a normal - zero - control. > It is cheating, I know, but it will then be able to visually spin > counter-clockwise too! Also I will not need 400+ V and the same circuit can > control a symbol Nixie. The drawback is that it will need a microcontroller. > > While trying all sorts of modifications to the spinner circuit, I noticed > that the most stubborn 6167 was made in 1955 (its K10 needs at least 225V > to light up in "Nixie mode"!) while the rest were assembled in 1958. In the > attached picture you can see how* the 1955 tube in the middle has a > shorter rounder dome*. The dirt on the glass is a sticky leftover of a > wax paper(?) that wrapped the tubes. > > I might look through the glass for construction differences but I stored > the 1955's 6167 away since .... it is mildly radioactive. On my > Geiger-Muller counter sensitive to hard-beta and gamma the 1955's 6167 > produces a 3x increase in CPM vs background while those from 1958 don't > make a difference. Note that *neither the glass bulb nor the box mention > the content of radioactive material* (nor the datasheet). Citing myself > (Wed, Nov 4, 2020, 1:12 PM to neonixie-l) "*Same goes for other 6140 > except for one, much older from 12/52 marked 423A. Neither the box nor the > glass carry any warning sign, but this tube hits >600 CPM vs 40 CPM > background*". Looks like that up to at least 1955 it was not required to > declare the content of radioactive material inside vacuum tubes (and that > W.E. was pretty generous on the amount used ;) IMVHO ). > > Last but not least I forgot I had inserted in my eBay watchlist item > #202784117971, a Western Electric burst timer. That's another device that > might have been documented online. > > Paolo > > -- 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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/abc11d83-6d64-400b-a096-7cf9d406ef35n%40googlegroups.com.
