>I wish we knew which device used W.E. 6167 dekatrons so that we could have a look at the diagram...
Hi Paolo, I did some research on these tubes about a decade ago. There was not much info available, perhaps more to be found now. Here is the one use case I did find - good luck finding out more! >From AAFM Vol. 6, No. 1 March, 1998 (Association of Air Force Missileers) Origin of the Ground Guidance System The Titan I guidance system was developed by Bell Telephone Laboratories (BTL). It started as a WW II shipboard radar, built by Western Electric Company, and grew to include an analog guidance computer for guiding early experimental rockets and the Nike-series missiles. The analog computer used two large motor-driven oil-filled sinecosine potentiometers and lots of op amps to generate the guidance equation. A bank of ten turn potentiometers provided variables to the guidance equation, so that roll-over and changes in acceleration could be programmed. The whole thing was sequenced by some little Western Electric 6167 ten-step pixie tubes. It used electron tubes, for this was before the proliferation of the transistor, and mean time between failures was acceptable for that era, but short. Yours, Mike On Thursday, February 24, 2022 at 6:58:00 AM UTC-5 Paolo Cravero wrote: > On Wed, Feb 23, 2022 at 11:04 PM Jon <deka...@nomotron.com> wrote: > > Thanks to Martin, Eric and Jon for their answers. > > However, if I understand Paolo's post, he's using Mike Moorrees's circuit ( >> https://threeneurons.files.wordpress.com/2011/09/we6167ckt.gif) which >> leaves the auxiliary anode disconnected. When I ran 6167s in this >> configuration they were generally much more reliable in not sticking on >> K10, though I was using rather different circuit conditions: >> >> - Va = +400V with respect to main cathodes >> - Transfer pulses 60V amplitude from a resting bias +30V with respect >> to main cathodes >> - Anode current 1.3mA >> >> >> Paolo, can you confirm you have indeed left pin 5 unconnected? >> > > Yes, I confirm I used that circuit from A to Z. Then I varied the bias > voltage and/or anode current (up to 1.5 mA), but both auxiliary anode and > reset were floating. > > I will rebuild the test setup with an external power supply that can > provide more current, as the LM393 booster is struggling with 2 mA at 400+ > V, and use zeners to derive the bias. According to Jon's list, a starting > point for voltages should be: > > - main cathodes +30V, > - transfer pulses from +60V to 0V, > - main anode at +430V; > - K10 current at 2mA which brings > - auxiliary anode at +115V (datasheet PDF, 4th page) > > I wish we knew which device used W.E. 6167 dekatrons so that we could have > a look at the diagram... > 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/45272f0f-f2c6-4b6f-a9f7-6acc1dcd332dn%40googlegroups.com.
