Re: [neonixie-l] Newbie would like to introduce himself

Welcome Rich... I too collect nixie tube test equipment including calculators, frequency counters, scalers with dekatrons, and nixie voltmeters. I even have some X,Y machining displays. I've been wanting to take some time to document some them. Once I get a piece of classic display

[neonixie-l] VFD filament drive

I'm designing a clock for DT-1704 tubes and am stumbling at the filament drive stage. They want 1.6V. I want to power it from 5VDC. I've tried wiring them in series, but there is a noticeable brightness gradient if I do. I've tried powering them using a LM4871 to generate a square wave with

Re: [neonixie-l] Re: B-7971 single tube device

Richard- I like the idea of modernized smartsockets using SMD and more modern parts! Are you selling these? I have a bunch of populated and unpopulated original 7971 smartsockets. Such a great original idea! Bill On Friday, August 13, 2021 at 8:53:54 PM UTC-7 Richard Scales wrote: > >

Re: [neonixie-l] Newbie would like to introduce himself

Please do! I've always suspected those X, Y, Z tubes were for machining On Fri, Aug 20, 2021, 12:20 PM Bill Notfaded wrote: > Welcome Rich... I too collect nixie tube test equipment including > calculators, frequency counters, scalers with dekatrons, and nixie > voltmeters. I even have some

Re: [neonixie-l] VFD filament drive

I used a 2.5VAC transformer for my NIMO clock, and use series dropping resistors to get the correct current. Those filaments run at 1.1 VAC and 200mA. Using AC cancels-out the brightness quirks when using DC. The series resistor will reduce the power-on current surge and therefore extend the

Re: [neonixie-l] VFD filament drive

Sorry for not being helpful, but I'd love to see your digivac clock when you're done! On Fri, Aug 20, 2021, 12:58 PM Paul Andrews wrote: > I'm designing a clock for DT-1704 tubes and am stumbling at the filament > drive stage. They want 1.6V. I want to power it from 5VDC. I've tried > wiring

[neonixie-l] Re: Dekatron Analog Meter with Analog Parts

Also I have a huge collection of Dekatron tubes... I hope to be able to eventually do more with them. Bill On Friday, August 20, 2021 at 10:02:59 AM UTC-7 Bill Notfaded wrote: > I also have a bunch of your boards Mike. I really like your documentation > too. At one point while I think you

[neonixie-l] Re: Dekatron Analog Meter with Analog Parts

I also have a bunch of your boards Mike. I really like your documentation too. At one point while I think you were maybe on a scuba trip I was afraid maybe you weren't ever coming back. I didn't know at the time and sent you many ebay messages. Glad to see you're doing more dekatron stuff!

Re: [neonixie-l] VFD filament drive

Theres a section on filament driving in my blog here: https://hannahmishin.com/blog/2017/4/30/russian-tri-color-vfd-indicator-clock *Hannah Mishin* * She/her/hers* *hannahmishin.com* On Fri, Aug 20, 2021 at 1:48 PM Toby Thain wrote: >

Re: [neonixie-l] Newbie would like to introduce himself

Hi Bill, Thanks for the welcome! Yes, I agree with you about the “sickness” and I’m probably not getting any better! It’s bad enough trying to find parts that are generally considered unobtainium, but you bring up another point when trying to find a manual (either owner or service) that

Re: [neonixie-l] VFD filament drive

I mean to try this on a device I'm building, but won't an H-bridge driver do ? It will provide an average potential of half the drive voltage giving the ability to place a grid or anode at a small negative potential, and if the filament requirement is less than the easy 5V it can be reduced using

Re: [neonixie-l] VFD filament drive

> > I'm designing a clock for DT-1704 tubes and am stumbling at the filament > drive stage. They want 1.6V. I want to power it from 5VDC. I've tried wiring > them in series, but there is a noticeable brightness gradient if I do. I'm a big fan of series resistors (one per tube). It's

Re: [neonixie-l] Corvair instrument panel is lit up

I love it..but then what's not to love? Nixies in a Corvair! Will there be a Dekatron for the gas gauge? I like it almost as much as I would a new incarnation of the Scope Clock...!! (hope springs eternal) On Sunday, August 15, 2021 at 8:46:34 AM UTC-4 Paul Andrews wrote: > That’s

Re: [neonixie-l] Re: B-7971 single tube device

Hello Bill, I have sold some completed units as well as bare boards (they come in pairs, one is the smart socket and one is for the wemos and HV supply which sits underneath). What is it you are interested in - Just he SMart Socket, the board pair, how many sets or boards? I was also

Re: [neonixie-l] VFD filament drive

On 2021-08-20 12:58 p.m., Paul Andrews wrote: > I'm designing a clock for DT-1704 tubes and am stumbling at the filament > drive stage. They want 1.6V. I want to power it from 5VDC. ... > FWIW I've used LM2575 1A adjustable step down for DC filament voltages in that range. --Toby > ... > >

Re: [neonixie-l] VFD filament drive

There is a nice article in NutsVolts magazine: http://www.nutsvolts.com/media-files/Forum-Articles/QA_201110.pdf where a powerful driver is shown, needs a small transformer but seems to be well designed with equations for calculations of the transformer. /Martin On Friday, 20 August 2021 at