[neonixie-l] Re: Well I tried, big tubes on ebay this am

I've got a Z567M, which for some reason desoldered internally. There connection is broken at the pins - a small piece of wire connects digits to pins under the mica shield. When I try to make it glow, it sometimes glows for a short moment - only the connected pin, though. Does your tube have a

[neonixie-l] Re: Well I tried, big tubes on ebay this am

I mentioned TDR earlier in the thread and actually was not completely joking... Will probably give it a try over the weekend... I can send a pulse with a sharp edge into the electrode and see how long it takes for a reflection to come back. Fast return = short wire attached, longer wait for re

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Using a couple of Keithley Source Measure Units in series as a high voltage supply. (I have a nice bench at work!) These let me go up to 420 volts at 100 mA with the pair in series. I took normal polarity up to about 330 volts measured across the tube at 15 mA this afternoon... no series resist

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

I made a portable ion probe out of one of those electric fly swatters. See this topic. Re. elements not lighting up - only the lead up to the element on my flaky 6844A tubes will glow unless I pump it with more current and then

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

That exactly what I use mine forvery quick test to see if it's lost gas... Sent from my iPhone > On Jun 7, 2017, at 16:47, Robert L wrote: > > Funny you should mention a plasma globe... I have one arriving tomorrow. Was > thinking of one as a quick and dirty check for gas inside theenvelop

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Sometimes reversing the polarity can shake things up enough to make some dark digits start lighting up. Set it up briefly so that one of the dark digits is the anode (+) side and the normal anode is the cathode (-) side. Of course, still be using the proper series resistance so that if or when it

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Funny you should mention a plasma globe... I have one arriving tomorrow. Was thinking of one as a quick and dirty check for gas inside theenvelope. I'll try running one or more of the unresponsive segments for awhile... Not optimistic as it looks like glow just near the tube base. Not a hint of

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

I've noted the same with some old NL840/841 variantssometimes I've found holding a reluctant tube next to a plasma globe for a few seconds has helped...don't ask me why...;-) On Wed, Jun 7, 2017 at 3:39 PM, Jeff Walton wrote: > Run them for awhile. Sometimes with old tubes it takes awhile t

RE: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Run them for awhile.  Sometimes with old tubes it takes awhile to fire all cathodes and clear surface deposits.  Use higher voltage to get them to fire and then back down to just run for awhile.  I had some old IN-8-2 with fine grids that took about 2 days before they would light properly

Re: [neonixie-l] Four NL-8091 on ebay

I would love to see a clock made of these. Anyone with deep pockets? Here is one over at bad Nixie: http://www.badnixie.com/The_%22RackMountable%22_Nixie.html. As my wife would say 'Le sigh'. > On Jun 7, 2017, at 5:05 PM, David Forbes wrote: > > He may have bought these tubes from Richardson

Re: [neonixie-l] Four NL-8091 on ebay

He may have bought these tubes from Richardson in 2009 for $50 each, and held onto them until he thought that he could recoup his invenstment. On 6/7/2017 2:01 PM, SWISSNIXIE - Jonathan F. wrote: Now he has 9pcs! I have bought other tubes from that seller and don't think its scam, but i wonde

[neonixie-l] Four NL-8091 on ebay

Now he has 9pcs! I have bought other tubes from that seller and don't think its scam, but i wonder where he gets all that stuff ... Like he sold around 100pc of 6091 tubes -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this

[neonixie-l] Re: Well I tried, big tubes on ebay this am

"Will peak in with a stereo microscope later tonight." No need for the scope - can see the tip of the pin glowing down at the base. A very small and somewhat out of position decimal point? B -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To un

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Started at 300 VDC for initial testing... The high voltage to help with poisoned elements or getting ignition if low gas pressure. Now running 200 V with 12k series resistor and the tube self limits at 5.3 mA on the "8" digit. The small glowing spot at the base for digit "6" with ~2 mA tube cur

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Doesn't sound like cathode-poisoning. Are you able to observe the straps welded to the individual pins ? Making a tube this size in a production environment is not trivial, so it's possible the weld broke, got dirty, etc. You mentioned going up to 300V; that's plenty enough because the '1' is

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Brilliant! > On Jun 7, 2017, at 3:26 PM, Nicholas Stock wrote: > > Now that's some thinking 'out of the box':-)...I like it! > > Sent from my iPhone > >> On Jun 7, 2017, at 12:24, gregebert wrote: >> >> Well, you could make a really goofy single-digit clock with tube #10. Since >> digit

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Now that's some thinking 'out of the box':-)...I like it! Sent from my iPhone > On Jun 7, 2017, at 12:24, gregebert wrote: > > Well, you could make a really goofy single-digit clock with tube #10. Since > digits 5 & 6 are out, you could have a mechanism to turn the tube upside down. > A me

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Well, you could make a really goofy single-digit clock with tube #10. Since digits 5 & 6 are out, you could have a mechanism to turn the tube upside down. A mechanical version of what the Soviets did with some of their tubes, like the IN-1. -- You received this message because you are subscrib

[neonixie-l] Re: Well I tried, big tubes on ebay this am

Some of the missing digits have very small hot spots near the base... Power supply in current limit. Not going to risk burning internal connections! One or two show as open with no measurable current flow... Testing at 300 VDC, 12K series and backup of a current limit on the HV supply on my benc

Re: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Very nice. I assume you have tried pumping more current through the non-working digits? Like do you get any glow on them at all, or just nothing? Any obvious signs that the non-functioning digits are disconnected? I was contemplating making a clock that deliberately malfunctions with some flaky

[neonixie-l] Re: 6x Multiplexing Nixie Current

I'm using a switch mode boost converter with a 9VDC input, so I think i'm good on that count. The high voltage is scary enough, I don't think I'd want to run the nixies directly from mains :/. I think I'll go with the 10k unless anyone thinks I should be more conservative and use a 15k. If a

[neonixie-l] NIB LC-631 on sale in Poland

I'm also interested in 6. does he accept PayPal? will he ship to the US? -- 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. T

[neonixie-l] Re: 6x Multiplexing Nixie Current

If you're using a wall wart and then a DC/DC converter, then it doesn't matter at all. All this 50Hz stuff comes from times when DC/DC converters weren't popular or cheap, so to make transformers smaller, the display was connected directly to mains, without any isolation. Some nixie clocks use

[neonixie-l] Four NL-8091 on ebay

Beauties! But very expensive -- 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 post to this group, send an email to neoni

[neonixie-l] arduino clock

https://www.nixieclock.biz/Store.html I found this kit online and I was wondering if anyone had any experience with it? it looks good though as it is fully open source so it's great for makers/hackers. -- You received this message because you are subscribed to the Google Groups "neonixie-l"

[neonixie-l] Re: 6x Multiplexing Nixie Current

Thanks for all the research! Does it matter that, being in the US, my frequency standard is 60Hz? Also, does the fact that I am using a standard 9v DC power supply make a difference? On Wednesday, June 7, 2017 at 2:48:54 AM UTC-4, Tomasz Kowalczyk wrote: > > Even more info! > https://tubes-sto

[neonixie-l] Re: 6x Multiplexing Nixie Current

Actually, I'm not sure how I'd meet that 10% and stay within threeneurons' specs. On Wednesday, June 7, 2017 at 8:49:52 AM UTC-4, scotth wrote: > > Oh, since I am turning on one anode at a time, by the time I get back to > the same anode, i have gone through 5 more 2ms steps so it has been 10ms,

[neonixie-l] Re: 6x Multiplexing Nixie Current

Oh, since I am turning on one anode at a time, by the time I get back to the same anode, i have gone through 5 more 2ms steps so it has been 10ms, right? Is that close enough, or should i adjust it so that it is 18ms, which would make the 1.8ms on time 10%? On Tuesday, June 6, 2017 at 1:12:52

[neonixie-l] Four NL-8091 on ebay

Time to take out a second mortgage folks: These on eBay: https://www.ebay.com/itm/112434355542 -- 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+unsubsc

[neonixie-l] Re: NIB LC-631 on sale in Poland

Hi, i would be interested in one piece. -- 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 post to this group, send an em

[neonixie-l] NIB LC-631 on sale in Poland

I am definitely interested. Maybe 6 tubes, but definitely one. Feel free to private message me if you like. Thanks for posting this. -- 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

[neonixie-l] NIB LC-631 on sale in Poland

Hi, there is some seller offering NIB LC-631s, with testing before sending in Poland. He wants 100zł (about 25$) for one. If anyone is interested, I can contact him and ask if he would send them abroad or e-mail in english with you. Warning - olx.pl is a site that only hosts offers, it does not