Re: [neonixie-l] Re: IN-14 and Mystery Tube?

I no longer breadboard projects, because PC boards are so inexpensive and their quality/neatness far exceeds anything I could do on a perfboard. I recently did a small HV supply for nixies; for $21 US I got 3 high-quality PCBs from OSH Park. They charge $5 US per square-inch, which is great for

[neonixie-l] Re: question about threeneurons clock kit

Ya mean for unused cathodes, like 6 thru 9 on the 10's minute, and 10's seconds ? Nope, it doesn't exercise those unused cathodes. I'm of the opinion, if those tubes are going to stay in that clock "forever", then it doesn't matter. On Friday, March 10, 2017 at 4:31:21 AM UTC-8, Tomas Begley

RE: [neonixie-l] Re: Lighting up a DM160

Look also for uranium glass stuff, especially marbles what are also good sources. eric Van: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] Namens Paul Andrews Verzonden: maandag 13 maart 2017 18:12 Aan: neonixie-l Onderwerp: [neonixie-l] Re: Lighting up a DM160 An

Re: [neonixie-l] Re: IN-14 and Mystery Tube?

The only components in there were resistors and the breadboard itself. Voltages were nixie level. I would say it was either a resistor or the breadboard itself. I am pretty religious about measuring stuff before I turn the power on (and after), and if there had been anything more complicated in

[neonixie-l] Re: IN-14 and Mystery Tube?

Sweet, thanks guys! I plan on putting the high-voltage portion of the circuit on a separate breadboard to keep things on the "safe" side. I'm pretty anal about making sure my connections are correct before I power any circuit up. Paul, are you sure it wasn't a resistor, diode, or even a cap?

[neonixie-l] A new old NixiSat about to be built!

Greetings from a new list member in Switzerland! Many years ago, in a different phase of my life, I discovered the NixiSat and fell in love with the design. I contacted Jeff Thomas and bought a full kit, including the enclosure and the cherry wood base. I also bought 6x Z5680M from Jan

[neonixie-l] Re: Lighting up a DM160

An important point: The current through the filament should be 30mA. That is the real reason why resistor network is like it is. A = V/R. Where V=11 (the voltage we are throwing away from the 12V supply, R=370 (100+270). So A = 11/370 ~= 0.03. On Thursday, March 9, 2017 at 9:32:32 PM UTC-5,

[neonixie-l] Re: Radioactive Nixies - Study

Another really hot source that can be found at home is maybe in a smoke detector! Some smoke-detecors use Am-241 sources to ionize the air. But the sources are encapsulated and you only can detect them if you disassemble your smoke alarm (which i would not do!) -- You received this message

Re: [neonixie-l] Re: Radioactive Nixies - Study

I didn't include the mantles because most people don't have them. A lot of people use the salt substitute. The Coleman replacement mantles sold by Century and made in India are still quite hot. http://www.neon-john.com/Nuke/century_mantle.jpg Last time I checked, WalMart still carried them.

Re: [neonixie-l] Re: Radioactive Nixies - Study

Well, I have bought a couple of old gas lamp mantle spares, the ones that shine *very* bright, and use them to check my geiger counters too. They use thorium to give out that extra bright. New ones are made with another process, not so bright but with no radioactive substances either. As far as

Re: [neonixie-l] Re: IN-14 and Mystery Tube?

You run another risk.. the thing that smoked might have changed its characteristics compared to a 'new' one. Can make a mess of cut-and-try design. John K - Original Message - From: judge2...@gmail.com To: 'Terry S' via neonixie-l Sent: Tuesday, March 14, 2017 12:10 AM

RE: [neonixie-l] Re: IN-14 and Mystery Tube?

It wasn’t the circuit. And just bread-boarding stuff, so if something breaks it gets junked! From: 'Terry S' via neonixie-l Sent: Monday, March 13, 2017 9:27 AM To: neonixie-l Subject: [neonixie-l] Re: IN-14 and Mystery Tube? Seems unlikely. If it smoked, you did damage. Nothing in the semi

[neonixie-l] Re: IN-14 and Mystery Tube?

Seems unlikely. If it smoked, you did damage. Nothing in the semi world gets hot enough to cause smoke without some damage. Revisit your circuit. If it hasn't failed yet, it will. Terry On Sunday, March 12, 2017 at 10:19:55 PM UTC-5, Paul Andrews wrote: > > Tell me about it :-/ I had smoke

[neonixie-l] Re: Radioactive Nixies - Study

Here is the image -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving

[neonixie-l] Re: Radioactive Nixies - Study

@ Paolo Cravero Attached is an image of my tube. For detection of the Kr85 in this tube you need a beta-sensitve counter that is placed close to the tube. Just 1-2 cm away you cant detect it anymore @gregebert If you have more tubes, only the area that is radioactive will be greater, the