Re: [neonixie-l] Faulty Atmel Microcontrollers from Aliexpress

[Nick]

Likewise - as I used to be in the UK, it was Farnell (Element 14, who also 
own Newark), RS, Rapid or similar. Occasionally, I'd use DigiKey or Mouser, 
both of whom have UK delivery services at respectable rates.

Out here in the UAE, it's still Farnell but I have to wait two days instead 
of one :)

Nick

On Sunday, 18 December 2016 03:22:01 UTC+4, nixiebunny wrote:
>
> I buy parts from Digikey for this reason. They always work. Think how 
> much money and time you would have saved by spending more on legitimate 
> components. 
>
> On 12/17/2016 1:26 PM, Luka C wrote: 
> > I'm writing this to warn others or ask if anyone had similar 
> > experiences. I purchased a lot of Atmel ATMEGA328P microcontrollers from 
> > a seller on Aliexpress. The lot was listed as "new" in the description 
> > and had a picture of the microcontroller in the reel so I thought it's a 
> > legit new sealed lot. After the package arrived, I noticed the 
> > microcontrollers were not in a real and were just randomly taped on a 
> > piece of some material with some semitransparent tape. I sent the boards 
> > to the local PCB soldering company and they have soldered 
> > microcontrollers on the boards. I flashed the program and the first 
> > board and it worked just fine so I thought I made a great deal because 
> > the price was really good for the lot. 
> > 
> > But this is where things became strange, after I was done programming 
> > the first board, I tested the other boards. The results were strange to 
> > say at least. Some of the microcontrollers came in a "state" where any 
> > fuse reprogramming was impossible (btw, SPIEN was not disabled in the 
> > fuses!). Two particular microncontroller samples were really strange. 
> > 
> > One seemed to execute really strange sequences of commands without any 
> > reason and my nixie clock would get frozen every now and then. Since I 
> > own the debugger (Atmel ICE), I decided to debug the firmware on the 
> > chip. It turns out that the chip would go really crazy when, for 
> > example, 0 and 5 were displayed on the two middle tubes on my clock. The 
> > debugger call stack showed that one function was executed when it should 
> > not have been and the values of variables in the programmed had values 
> > that in no way could be there in the normal program operation. 
> > 
> > Second one had trouble outputting data to the LED controller. Debugging 
> > this one's firmware showed that the microcontroller was not frozen and 
> > in fact was sending data to the LED controller but I guess the data was 
> > not properly formatted or something. 
> > 
> > There were some boards with perfectly fine chips so I decided to do a 
> > simple tested. Since my clock consists of 2 boards, one for the 
> > microcontrollers and power supply circuitry and the other one for the 
> > nixie tubes and the LEDs, I decided to do a test and swapped the board 
> > with the tubes and LEDs across both "working" and "faulty" 
> > microcontroller boards. The working ones never produced not a single 
> > fault or glitch, I tried to replicate the bugs on them with no success. 
> > On the other hand, the faulty ones were impossible to fix even by 
> > reflashing the microcontrollers multiple times with the exact same hex 
> > filed used to flash the working ones. 
> > 
> > At the end, I am confused. I am not sure what to conclude from this 
> > really. I believe the fault is not in the board itself (PCB layout or 
> > connections) but that it comes from the faulty microcontrollers I have 
> > purchased. After doing a little research on the internet, I found some 
> > people saying that these Chinese companies basically buy used equipment 
> > and remove the microcontrollers from them or that they simply purchased 
> > large quantities of chips that have failed quality control and sells 
> > them at lower prices. I will try to find a way to remove the faulty ones 
> > from the boards and replace them with new ones purchased from RS 
> > Components and then do the tests again. 
> > 
> > Anyone ever had similar experiences or has any idea why would this 
> happen? 
> > 
>
>
> -- 
> David Forbes, Tucson AZ 
>
>

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[neonixie-l] Re: Great article on Mr. Parry's amazing work

[Nick]

Fully deserving of recognition for all the great work he does... lovely 
pieces...

Nick

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Re: [neonixie-l] TI MSP430 promo...

[Nick]

On Tuesday, 29 November 2016 20:20:48 UTC+4, nixiebunny wrote:
>
> Do you know if the on-chip peripheral support in CCS is complete? 
>

I've now checked and support is complete...

When TI issue a new chip, they release a xxx.h file and a xxx.cmd file for 
the device - the .h file contains all the global references to registers 
and bit patterns for them (pin numbers etc.) and the .cmd file is a linker 
input file that associates all the global register references to absolute 
addresses specific to that device.

When a project is created and you select the chip that you want to target, 
CCS associates the appropriate header and cmd file for you automatically. 
Easy. 

If you change the target, that's pretty easy too, especially if you use 
their DRIVERLIB package in the MSPware free support suite...

Nick

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[neonixie-l] Re: A Rare Chance

[Nick]

It's actually quite a fiddly job and you need the new firmware from somewhere...

Nick

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Re: [neonixie-l] TI MSP430 promo...

[Nick]

It is cloud centric - this approach does make sense as there is so much there 
and it's constantly being updated.

If I was on satellite internet like you I'd take my laptop/system to a local 
library or somewhere with free wi-fi and do the downloads there.

Although I use windows, I fly a lot so have switched to local copies of the key 
packages on my laptop - it's easy to do... Much of the package documentation is 
now webby and seems to be generated by doxygen, which is a good approach.

My experience of TI's support has also been very positive. They are very 
responsive and helpful - the e2e forums are good and full of TI support staff 
and engineers. The nice thing about the MSP stuff is that the user community is 
pretty much entirely professional, so the quality of forum content is 
consequently high - a bit of a snobby thing to say, but true none the less :)

Nick

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Re: [neonixie-l] TI MSP430 promo...

[Nick]

As far as I know, it's all there. However, it's such a complicated and 
comprehensive device that I've obviously not tested everything.

TI are generally very good at this sort of thing - the MSPware library 
specifically supports this chip and all the registers etc. should be there.

Remember that TI use RedHat for their compilers as that this is not some 
amateur thing; it's a full-blown professional development environment.

For under USD 16 :)

Nick

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[neonixie-l] TI MSP430 promo...

[Nick]

Texas Instruments have a great promo on the new MSP430FR5994 Launchpad - 
for USD 15.99 you get the Launchpad (which includes supercap battery backup 
and uSD card, ISP/programmer etc.), PLUS a node-locked (single user) full 
license for CCS, normally USD 495 - CCS is free to download anyway, but the 
free TI compiler is size-limited - you can use the g++ compiler for free, 
but its code generation is not as good as he normally paid-for TI one.

The offer includes a fully licensed and unlocked TI compiler with free 
updates too. Just noticed, I got free delivery to the UK too...

Promo code is CCS-PROMOMSP-EXP430FR5994, see 
https://store.ti.com/MSP430FR5994-LaunchPad-Development-Kit-with-Code-Composer-Studio-Promotion-P51095.aspx
 

I ordered two - the Launchpads are just great,

Nick

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[neonixie-l] Re: A Rare Chance

[Nick]

Back on yet again...

http://www.ebay.ca/itm/401226819712

Nick

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Re: [neonixie-l] Re: Favorite cross-fading algorithms...

[Nick]

Thanks for that - looks OK - nicely laid out code - I spent 20-odd years 
doing low-level real-time C++ design & coding for exchanges and trading 
systems, so I like a bit of C++ !

I'll read through it over the next few days - appreciated...

Cheers

Nick

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Re: [neonixie-l] Re: Favorite cross-fading algorithms...

[Nick]

Hi Ian - do you have a link to the repository?

Thanks

Nick (the UAE one)

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[neonixie-l] Re: Favorite cross-fading algorithms...

[Nick]

Hi - Not sure which clock that would be - you may well be right, but there 
two "Nick"s here, both British, both ex-pats too (one in the US of A, the 
other in the UAE)...

Cheers Nick (the UAE one)

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Re: [neonixie-l] "Lectrascan" information?

[Nick]

That's actually a Quotron rather than a Lectrascan unit - they were 
competitors...

See thread 
https://groups.google.com/d/msg/neonixie-l/MDn6HDUbiN8/hEZMgDKVGa4J 

Nick

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[neonixie-l] Re: There's more!

[Nick]

Auction was ended early... no bids at the time...

Nick

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[neonixie-l] Favorite cross-fading algorithms...

[Nick]

Just wondering what people's favorite smooth cross-fading algorithms were, 
assuming that they're prepared to share !

I tend to PWM down one digit and PWM up the next over a short interval, but 
others will have their own methods...

Nick

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[neonixie-l] Re: F9020AA sold on eBay

[Nick]

Probably a reasonable price - I have only one of these, found probably 10 
years ago, None since.

They are rare, and MASSIVE.

Nick

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[neonixie-l] Re: Burroughs B-5859 Nixie Tube

[Nick]

These tubes use a Cinch SK-207 - see 
http://www.tube-tester.com/sites/nixie/data/soc/SK-207/SK-207.htm  
<http://www.tube-tester.com/sites/nixie/data/soc/SK-207/SK-207.htm>

Cheers

Nick

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[neonixie-l] Sand clock

[Nick]

That's really cool. Like that!

Another and clock: https://youtu.be/_nfmNuyp1LA

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[neonixie-l] Re: A Rare Chance

[Nick]

Quite a lot changed with the upgrade - new firmware, new components for the 
new GPS puck, removal of the old GPS unit from underneath, replacement of 
the BNC for a PS2-style connector (for the new Haicom GPS unit), changes in 
the anode resistors and the current limit for the PSU etc.

https://groups.google.com/d/msg/neonixie-l/evzX0noEGXg/JrVaZG3YFogJ

Nick

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[neonixie-l] A Rare Chance

[Nick]

Crack and a poor repair in the cover too. Also missing the magnet to set the 
reed switches.

The GPS on these units does die - mine failed about 10 years ago and I only got 
round to restoring and upgrading it just before Jeff died.

It may be that the new firmware for the haicom replacement GPS is available 
elsewhere.

Nick

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[neonixie-l] Re: IN-18 Typical Failure Mechanism

[Nick]

Some kits I've built which use pin sockets (MillMax etc.) use over-large 
holes for the pins so they have some movement - you number the tubes 1-4, 
corresponding to their placement on the board - the pins are tacked onto 
the board with the tube in place, then soldered fully - this way the pins 
for a particular position align correctly with the tube in that position, 
thus minimizing the stress on that tube. This rationale obviously breaks 
down if you have to change a tube for some reason.

Personally, I don't like soldered MillMax pins much as their use normally 
assumes that all tubes are perfect and identical. Sockets are good as they 
allow for variation.

Nick


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[neonixie-l] Re: RTC chips that behave nicely with crystals

[Nick]

The DS323x series are simple great chips - they may be a few $ more, but 
it's not all about cost - lower component count, greater accuracy 
(actually, phenomenal accuracy).

What's not to like?

Nick

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[neonixie-l] Re: Valvo datasheet "Valvo Brief" from 26.04.1970 with DDM14 circuit - does anyone here have this?

[Nick]

As Valvo were part of Philips, I dropped a line to Ronald Dekker, who, as 
we know, a) has access to the Philips archives, and b) has a deep interest 
in this sort of stuff - maybe he'll be able to help?

Nick

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[neonixie-l] Re: Valvo datasheet "Valvo Brief" from 26.04.1970 with DDM14 circuit - does anyone here have this?

[Nick]

Hi,

As you know, there is a small amount of info in German - from what I 
understand, the DDM14, whilst aimed at the ZM1200, will happily drive 
pretty much any group of up to 14 "normal" nixies.

It seems to be a shifted in bitstream + latch, nothing unusual, but only 
drives 0-9, i.e. has no decimal point support.

This is an interesting idea - the ZM1200 is a great tube, really designed 
for calculators - 14 digits are quite a lot I find the ZM1206 at 8 
digits a bit more useful ("dd-mm-yy" or "hh.mm.ss" fit nicely).

NIck

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Re: [neonixie-l] OT: Help on Altium file extensions...

[Nick]

Interesting. So basically just the PCB data - no schematic and no component 
data - not enough to assemble a board...

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[neonixie-l] OT: Help on Altium file extensions...

[Nick]

Hi - can anyone who is familiar with Altium help me with what these 
extensions are (apart from the usual Gerber stuff).

Are the schematics there? Altium's web site is as clear as mud to me!

Ta

Nick

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Re: [neonixie-l] NOT another nixie clock!

[Nick]

I think you mean the MSP430, not the 432 - the 432 is very new.

I've never had any issues with serial comms on any launchpad and I've been 
using them since day 1 - maybe it's just your system or a duff launchpad, 
though I've never heard of one of those failing either.

I use mainly Windows, but have used the serial comms to all sorts of devices, 
from microprocessors to Cisco routers.

Nick

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Re: [neonixie-l] NOT another nixie clock!

[Nick]

I've been using MSP43xs for a few years now - they are simply lovely. The 
Launchpads are great, fully functional, boards and as has been mentioned, 
they have a complete programming system built in. MSP430s area have a 
16-bit ultra-low-power proprietary core; MSP432s are low-power, faster, 
industry-standard 32-bit ARM Cortex-M based. An example of the madly 
low-power FRAM-based MSP430s is the MSP430FR5969 - the Launchpad for that 
is at http://www.ti.com/tool/msp-exp430fr5969 costing a whopping USD 16 
all-in.

For further, IoT, fun, they newer boards also have upower measurement 
capability - you can measure the power used (with tiny tiny granularity in 
fractons of a milli-joule) for individual functions - all supported by the 
IDE - either use TI's IDE or Energia as mentioned. TI call it "EnergyTrace" 
- use it to estimate battery life etc.

It's also worth mentioning that the TI E2E support forums for the MSPs (
https://e2e.ti.com/support/microcontrollers/msp430/f/) are manned by 
experienced MSP engineers, both software and hardware. The 
designers/maintainers of the MSPWare HAL library (also written in C++) also 
hang out there.

There is also a great user (non-TI) forum at http://43oh.com/ - this is 
directly equivalent to AVRFreaks etc.

If you want JTAG, that's included but you can use the MSP-FET (
http://www.ti.com/tool/msp-fet), a USB JTAG tool that also provides a UART 
back-channel so running a terminal emulator on your host you can talk 
directly to the MSP dev board application.

I love these chips - they are almost exclusively used by the trade, but 
there are basic ones in DIP packages up to a whole world of SMDs.

HTH

Nick

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Re: [neonixie-l] NOT another nixie clock!

[Nick]

Upvote here for the TI MSP43x series.

The new ones, the 432s, run at 13 microamp per MHz. Very easy to programming 
(C++) using free IDE. Development boards (aka "launchpads") cost just a few 
USD. Lovely chips...

Nick

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Re: [neonixie-l] Re: NixiChron upgrade, new firmware, NixiChron style case...

[Nick]

Yeah. But it won't work on Lord Howe Island. Showstopper, that !

Nick

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[neonixie-l] Re: Video: How the nixie tube is made

[Nick]

Terrific stuff, Dalibor. Great video - truly impressive work.

Nick

On Friday, 30 September 2016 15:12:11 UTC+4, Dalibor wrote:
>
> Hello!
>
> It's been a couple of years since I found Neonixie forum at my hunt for 
> nixie tube related knowledge. It helped me to find a lot of information and 
> has connected me with many people who contributed to my "nixie tube 
> resurrection" project. What was a hobby project at the beginning has turned 
> into a serious fulltime work. I enjoy every day in the shop and would like 
> to share the fun with you.
>
> link to Youtube: https://www.youtube.com/watch?v=wxL4ElboiuA
>
> Thanks for watching!
>
> Best regads,
>
> Dalibor Farny
>

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[neonixie-l] NEON: The Charged Line...

[Nick]

Fantastic exhibition of neon art from the 1930s onwards at Blackpool's 
Grundy Gallery from 1st September to 7th January 2017. Quite a few of these 
pieces were also in the "Lumiere" show in London in January this year 
(which I also mentioned on this forum - 
https://groups.google.com/d/msg/neonixie-l/ky8ikP1iMUk/GM9LBCD7BwAJ).

http://www.grundyartgallery.com/programme/current/  
<http://www.grundyartgallery.com/programme/current/>


http://www.creativeboom.com/events/neon-the-charged-line-celebrates-the-most-internationally-renowned-neon-artworks/

Artists:
Fiona Banner, David Batchelor, Noel Clueit, Martin Creed, Shezad Dawood, 
Tracey Emin, Tim Etchells, Cerith Wyn Evans, Graham Fagen, Ron Haselden, 
Robert Irwin, Joseph Kosuth, Bertrand Lavier, François Morellet, Paulina 
Olowska, Joe Fletcher Orr, Eddie Peake, Mai-Thu Perret, Prem Sahib, Keith 
Sonnier, Evren Tekinoktay, Gavin Turk

NEON: The Charged Line will be a major new survey exhibition exploring how 
artists have worked with neon, from the 1960s to the present day. The 
exhibition will encompass a wide range of ways in which artists have 
experimented with light designed to be seen rather than illuminate; whether 
through text and language, the drawn line or an investigation into its 
physical and sculptural qualities.

Coinciding with the famous 'Illuminations', we will also be displaying 
rarely seen 1930s designs highlighting Blackpool's pioneering role in the 
history of neon in the UK.

Nick

<https://lh3.googleusercontent.com/-4aIL8tbq5D8/V8vdqg44j0I/A2M/e-YRnXlNhD4zBlyPQPZudTtsDq4BCo6nwCLcB/s1600/IMG_3846_1536x864-1.jpg>

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Re: [neonixie-l] Nixie tube at 300 000 V

[Nick de Smith]

Some years back when I did a lot of Tesla Coil stuff, one of the standard 
things to do was light a fluorescent tube just by holding it near the topload.

I kept a bunch of cheap Chinese nixies with the coils for public demos. If you 
search YouTube for "Cambridge Teslathon" you might find some videos that we 
did, along with some of our more extreme stuff with thermite :)

Nick

On 2 September 2016 16:02:10 BST, Nicholas Stock  wrote:
>Nice, thanks for sharing...
>
>Turns out 300,000V *is not good for cathode poisoning*who would
>have
>known? ;)
>
>Nick
>
>On Thu, Sep 1, 2016 at 11:37 PM, Tom Van Baak 
>wrote:
>
>> I ran across this IN-18 page by Chris Gerekos:
>> http://www.hazardousphysics.com/main/in18clock/IN-18_Nixie_
>> Tube_Clock_1.html
>>
>> If you think adding a blue LED glow to a nixie tube is cool,
>apparently
>> this is how real men do it:
>> http://www.hazardousphysics.com/misc/Nixie_tube_at_30V.html
>>
>> /tvb
>>
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[neonixie-l] Re: Dekatron Experiments

[Nick]

Very nice!

I like the discrete XOR gate but its a lot of complexity when you can get a 
single "tiny logic" XOR gate from Fairchild, Texas or whoever for $0.10 - 
one SOT-23 (as opposed to 4 diodes, 4 resistors and a transistor) and 
you're there... :)

Yeah. I saw the odd voltage levels too!

Nick

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[neonixie-l] Re: One slot on my clock keeps burning out tubes, while the others have been good for years. Thoughts?

[Nick]

I'm with the others - there is something about this slot which 
differentiates it from the others.

Either it's a mechanical issue with the socket stressing the pins to the 
extent the tube eventually becomes leaky

...or it's to do with the anode driver (the cathodes share the same drive 
across all tubes) - either the anode resistor has failed in some way (or 
isn't the correct value) or the opto-coupler is leaky/faulty (but I'm not 
sure how that would cause premature tube failure), Vceo for a PC817 is 80V, 
which should be OK, but this one may have failed - they are really cheap, 
so maybe change it anyway :)

Check the values of R11-R16.

Have you tried the "faulty" tube in a known-good position in the clock? Are 
you certain the tube has failed, not the surrounding circuitry cooking 
slowly over time, then failing, then you turn the clock off to replace the 
tube so it all cools down and the cycle repeats?

Cheers

Nick

.

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[neonixie-l] Re: Group document repository...

[Nick]

Not really - the link will leak and the rights are the same for all uses of 
the link, there is no user authorisation or permissioning control.

Nick

On Tuesday, 16 August 2016 12:18:43 UTC+1, Roddy Scott wrote:
>
> If the link is only available to members then would that not suffice? 
> Suscriber only access?
>
> Just a thought.
>
> On Monday, August 15, 2016 at 2:49:21 PM UTC+1, Nick wrote:
>>
>> Making it public and a direct link doesn't address the access 
>> requirements mentioned above - anybody with the link would have access...
>>
>> Nick
>>
>

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[neonixie-l] Re: Burroughs Panaplex II clock display...

[Nick]

I've built a large number of Panaplex-based clocks over the years, so am 
well used to them. Just checked - still got several 100 displays, including 
a lot of SP101s and for some reason, trays of SP336s as well a a few 
"exotics".

These CM (Custom Module) displays have already been probed - the hh:mm:ss 
variant has duplicate segment pins for the left-most digit - both displays 
were reluctant to light fully at first (as are a lot of Panaplex displays 
which have been in storage for a long time), but a bit of persuading and 
they're there now.

Nick

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[neonixie-l] Re: Group document repository...

[Nick]

Making it public and a direct link doesn't address the access requirements 
mentioned above - anybody with the link would have access...

Nick

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[neonixie-l] Re: Burroughs Panaplex II clock display...

[Nick]

Just noticed that these don't seem to have an obvious anode connection - 
has anyone powered one up, and if so, what sort of connection did you use?

You can see the anode (transparent-ish metal film over the face of each 
digit), but no obvious way of making a connection to it, though the metal 
film does seem to extend into the connection area for the cathodes. I've 
tried taking a photo of it, but being transparent, it doesn't show up very 
well !

Nick

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[neonixie-l] Re: E1T restorations

[Nick]

Simply lovely bits of kit - great to see them restored...

Nick

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[neonixie-l] Re: Group document repository...

[Nick]

I can't see an obvious way either of these integrate with Google Groups...

Google Drive is part of Google Apps - a paid-for option.

How would you integrate either of these services with Google Groups? With 
supported integration, user management is a pain.

Cheers

Nick

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[neonixie-l] Re: Rare Nimo Tubes

[Nick]

Little more on these - I had a few broken ones in the bulk packing, so here 
are some internal shots showing the digit mask and one of the electron guns 
(one under each digit in the mask).

<https://lh3.googleusercontent.com/-DNl34Jd0taU/V6ism3LzejI/A1g/CL7kORZf5_MmkVI3NHh-tlXBJzhXdpk_ACLcB/s1600/Snap_2.jpg>

<https://lh3.googleusercontent.com/-7r-Rlc3vf7I/V6iss4pzSkI/A1k/c9tMd8llgHoGmpdJvymvwzJy5bqncDUQACLcB/s1600/Snap_1.jpg>


Nick

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Re: [neonixie-l] Playing with E1T-tubes & restoring them

[Nick]

On Monday, 8 August 2016 16:25:51 UTC+1, Pramanicin wrote:
>
> Nick, have you considered a Dropbox for the files instead?
>
> (the other) Nick.
>

Just beat you to this :)  

Started a new thread for the topic, with Dropbox as an option...

Cheers

Nick (the real one!)

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[neonixie-l] Re: Take a look at this....

[Nick]

Amazing what you can do with magnets!

http://archiduke.blogspot.co.uk/2012/03/magnetic-bed.html

Not cheap, though!

Nick

On Thursday, 21 July 2016 16:43:09 UTC+1, Pramanicin wrote:
>
>
> https://www.kickstarter.com/projects/lasermad/time-flies-levitating-nixie-clock
>

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[neonixie-l] Group document repository...

[Nick]

Ideas please!

Any way we could use a Google service for this would be preferred, 
integration with Groups would be even better

Need the concept of users (upload & read allowed, but no moves or deletes) 
& admins (full access) for sure Low Gb would be enough... Maybe Dropbox?

Private servers, e.g. members' own, would not be a viable option... :)

Cheers

Nick

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Re: [neonixie-l] Playing with E1T-tubes & restoring them

[Nick]

On Monday, 8 August 2016 06:41:01 UTC+1, Dave Brown wrote:
>
> We dont seem to have a files section on this group? 
>

We should have - I keep intending to do it - considered Google docs etc but 
there doesn't seem to be a way to automatically allow all members of a 
Google Group to have controlled access.

I'd really welcome members' input on this :)

Cheers

Nick

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[neonixie-l] Re: XC24...

[Nick]

Two other, far less interesting, XC24 boxes...




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[neonixie-l] Re: XC24...

[Nick]

Whilst wiring two XC-18s together *should* work fine, it doesn't reliably 
as they two tubes would need to be perfectly matched, and they never are... 
Grahame and I both tried it without too much success...

Not fired up these XC-24s yet...

Nick
 

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[neonixie-l] Re: XC24...

[Nick]

On Thursday, 4 August 2016 13:11:23 UTC+1, Nick  wrote:
> After wondering if I'd ever actually see any of these, I finally found a 
> few... NIB in very pretty little boxes...
> 
> Nick

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[neonixie-l] Re: Rare Nimo Tubes

[Nick]

USD 100 each seems to be about the going rate.

The ones I have are in the same bulk packing...

Nick

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Re: [neonixie-l] Playing with E1T-tubes & restoring them

[Nick]

Regarding the loss of the labels, it's a problem we also have restoring vintage 
radios.

What I use is laser printer water transfer decal paper, e.g. 
https://www.amazon.co.uk/gp/aw/d/B00RKGQP2E/ref=mp_s_a_1_4?ie=UTF8&qid=1470280445&sr=8-4&pi=AC_SX236_SY340_FMwebp_QL65&keywords=clear+water+slide+decal+paper&dpPl=1&dpID=414kMs0IOML&ref=plSrch
 . Make sure you get the LASER not the inkjet version.

You make up your design (the E1T decals in this case) using your favourite 
graphics package, then print them before floating the label off and onto the 
valve/capacitor can/radio dial/whatever...

HTH

Nick

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Re: [neonixie-l] Re: These don't come up very often...

[Nick]

You need to search the world rather than your local eBay. It came up in my 
searches

Nick (UK)

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[neonixie-l] Re: Take a look at this....

[Nick]

Have a look at 4HV - lots of working projects on there including wireless power 
transfer using Royer oscillators - built one myself about 5 years ago when 
doing a lot if Tesla Coil stuff...

Nick

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Re: [neonixie-l] Re: Help required on nixie power supply

[Nick de Smith]

Noise on the FB pin is a common problem with poor layout, hence asking for a 
look at it.

You should not need any other bypass caps if the layout is good and the 
component choice likewise.

Nick

On 15 July 2016 22:01:39 BST, gregebert  wrote:
>Although the supply is behaving like it's under-loaded, there could be 
>another culprit: noise.
>
>I've looked at the schematic, and it's possible that the PCB layout
>could 
>be injecting excess noise into the MAX1771. Is the bypass cap C3
>located as 
>close to the 1771 as possible ?  I think C4 should be close to the 
>inductor. Be sure to check the power supply pins of the 1771 with your 
>scope.
>
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[neonixie-l] Help required on nixie power supply

[Nick]

Can we see whole layout please?

Nick (de Smith)

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[neonixie-l] OT: MegaProcessor...

[Nick]

https://www.youtube.com/watch?v=z71h9XZbAWY

LOTS and LOTS of LEDs!

Nick

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Re: [neonixie-l] Odd Tubes

[Nick de Smith]

Experience shows that nixies and road vehicles don't mix - the nixies fail in 
due course due to mechanical breakdown.

Nick

On 2 July 2016 07:27:36 GMT+01:00, gregebert  wrote:
>I was going to suggest a creativity contest: Whoever comes up with the
>most 
>imaginative idea and has the expertise to build it, should get the
>tubes.
>
>If I was into vehicle restoration (unfortunately I cant because my
>garage 
>is already cluttered), a full dashboard with nixie tubes would be
>my 
>choice; the fractional tube could be used for a fuel gauge.
>
>Interesting tubes; any idea who the manufacturer is ?
>
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Re: [neonixie-l] Re: Looking for Tubes!

[Nick de Smith]

I have 4 X 50317 NIB in stock - contact me off list if you are interested...

Nick

On 30 June 2016 14:38:51 GMT+01:00, John Olivero  
wrote:
>I appreciate the info on the possible cathode contamination and will
>take 
>that into consideration. The question I would have going forward would
>be, 
>do the 5092's come with special characters? The reason I was looking at
>the 
>50317 was because it was the correct sizing I needed and it contained
>the 
>special characters O,S,E,C. If the 5092's dont come in special
>characters 
>would you have a possible recommendation of where I may be able to find
>a 
>tube that contains the characters I need? In my research I havent found
>too 
>many that contain those specific ones. 
>
>As far as the clock build goes... its going to be quite the production.
>
>Originally I was going to do a standard clock with six digits and 
>separators with larger tubes. However, I couldnt really find any large 
>tubes available that I liked. So I decided to go all out and do
>something I 
>have never seen before in the Nixie clock world. I am going to make a
>clock 
>that can spell out the time for you, using the special characters. In
>doing 
>this because of the limited character sets available within the tubes I
>
>will need... get ready for it... 36 tubes. I have found and sourced a
>good 
>amount of the ones I need already but the hard work has not even come
>close 
>to being started. As far as the total tubes I need and quantities they
>are 
>as follows:
>
>B-50317 (Y,V,K,D,A,M,E,S,O,C) x6 Will probably be rethinking these
>now...
>LL-553 (Z,H,F,S,W) x4
>LL-555 (L,C,T,Y,R,N,B) x10 (Found/Bought)
>LL-556 (S,P,M,U,G) x3 (Found/Bought)
>LL-557 (E,J,A,V,F,H) x6 (Found/Bought
>LL-558 (D,W,K,Z,X,L) x4 (Found/Bought)
>NL-5016 (+,-) x3 (Found/Bought)
>
>The Orientation of the tubes will be over three rows with 11 in the
>first, 
>13 in the second and 12 in the third.
>
>Please feel free to ask any specifics and I will answer the best I can!
>
>On Wednesday, June 29, 2016 at 11:18:38 PM UTC-5, gregebert wrote:
>>
>> If these are related to the 5031 (the round dome is a dead-giveaway),
>be 
>> careful.  I have several 5031's that are non-functional, perhaps due
>to 
>> cathode contamination. I have been unable to recondition them, even
>with 
>> higher current. Only the internal bondwires will glow.
>>
>> The later generation 5092 is a very reliable tube, and none that I
>own 
>> show any defects, nor do any of the 18 I have in operation in other
>clocks.
>>
>> Yes, we'd like to hear some details about your clock plans!
>>
>
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Re: [neonixie-l] Re: HLK-PM01

[Nick Sargeant]

I tend to use laptop power supplies to interface with my projects - I am 
always picking up power supplies as laptops get replaced at work. They 
usually kick out 19.5v at 4 or 5 amps. I then design in a small switcher to 
bring that down to 5v for the using application, and put that on the board 
with the rest of the electronics. I have been using a small L4960 design 
for *many* years, which gets copied from project to project. That one 
doesn't get down to 3.3v, so I have had to find another one for more recent 
designs. 



On Thursday, 30 June 2016 05:56:47 UTC+1, SWISSNIXIE - Jonathan F. wrote:
>
> If you dont want a wall brick, you could mount a power-supply with a cable 
> (like the laptop ones, that have a cable going to the laptop and one to the 
> mains socket) and directly mount that inside the clock case, maybe takes as 
> much space as a self designed Off-Line supply. There are even some around 
> that can supply different voltages. 
>
> I worked with mains AC in my last job (230V up to 1000V), but i would 
> never make a project with mains ac because if i get injured, or my house 
> burns down, no insurance will cover that..
>

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Re: [neonixie-l] Cogwheelcircuit

[Nick]

Has Pete Hand any FLW kits left?

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Re: [neonixie-l] My NixiChron is sick, what do I do?

[Nick]

It uses a max771-based supply. For the FET to get really hot a number of things 
could have happened, including the MAX771 latching up, the FET dying, and the 
feedback network topend resistor going o/c, HF oscillation etc...

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Re: [neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

Have you tried taking the tubes out and replacing them one at a time, then in 
pairs, rotating them between positions?

This is a solid fault, so I'd focus on eliminating the easy stuff before 
worrying about signal degradation...

If the max771 was cooking, that's not good at all. 

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Re: [neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

Hang on... is it fixed now or us it still with someone?

Nick

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Re: [neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

Whilst I think that most now agree that the signals should have been 
level-shifted, that does not explain how a clock that worked for ages suddenly 
goes nuts... good point that actually - was it a sudden fault or did it slowly 
get worse?

I would start by swapping the hv drivers over and seeing if the problem moves, 
scoping the 5v rail to look for noise and sag, removing the hv drivers and then 
replacing one at a time etc. i.e. elimination. 

Theory is great and interesting but won't help much in solving the immediate 
mystery...

Nick

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Re: [neonixie-l] Re: Boost converter inductor sizing question

[Nick]

I wasn't getting at you at all John :) The MAX1771 is a subtle beast and 
quick to anger - if you recall I had a look at your setup and couldn't see 
what was causing it to misbehave... it took me about 6 goes (and 
discussions with Maxim) before my attempts got to the final stage.

The 1771 is a bit of a Ferrari and my design is aimed at optimum 
performance, not cost-effectiveness - generally, if you stick exactly to 
what's on the page, it'll work every time, but moving it onto another board 
etc. can sometimes be problematic... 

Your brilliant, left-field, designs more than make up for that !

Cheers

Nick

On Wednesday, 18 May 2016 21:20:48 UTC+1, Nixcited delighted wrote:
>
> That'll be me ignoring your guidelines then Nick. I can't get that picky 
> circuit to play nicely as you know and it demands the manufacturing of 
> proper PCBs and the relatively expensive components you specify,  so I 
> simply won't bother with it any more. I appreciate the time and effort you 
> put into your research and the intellectual elegance of it all, I just got 
> frustrated with it, me being a numpty and all. 
>

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[neonixie-l] Re: Boost converter inductor sizing question

[Nick]

The design on that page has been built many 100s of time with no problems - 
where people have had issues is where they've chosen to ignore the very 
specific guidelines on component choice and layout :)

Nick

On Tuesday, 17 May 2016 21:18:51 UTC+1, ZY wrote:
>
> Hello. I'm trying to build a boost converter for my project to boost 12V 
> to 150-220V. I'm looking at various converter circuits online, like this 
> one: http://desmith.net/NMdS/Electronics/NixiePSU.html, and they use 
> inductors on the order of 100uH to 150uH, and use drivers that switch at 
> something like 300KHz. But when I look at the wikipedia equation for 
> discontinuous mode output voltage, it's this: 
>

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Re: [neonixie-l] Neon Signs

[Nick]

The thing about MOTs is they are built to a price and have some quirks, e.g. 
one end of the secondary is connected to the core/ground. If cascading MOTs, 
generally you would disconnect the wire from the core and daisy-chain the 
secondaries but that then means that there is suddenly 2000V (or a multiple 
thereof) between this wire and the core when the insulation in the transformer 
was designed for zero volts. Further, you are also uplifting the voltage 
between the primary and secondary way above what it was designed for.

If using MOTs in parallel, they should be identical models (obviously).

I.e there are some serious safety issues here. Even a small MOT-driven device 
could cause serious injury or worse.

These sorts of voltages and currents can easily kill. 

Basically, if you're not experienced in HV, I'd avoid MOTs.

If you really want to build a TC and are not especially drawn to retro, I.e. 
rotary spark gap designs, I'd recommend a small DRSSTC (doubly resonant 
solid-state Tesla coil).

These are pretty straight-forward, extremely satisfyingly and can be 
audio-modulated. Lots of standard designs out there and lots of help on forums 
such as 4HV. Pre-wound secondaries and all the bits (primary tubing, toploads, 
insulators etc.) can be found on eBay.

HTH

Nick

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[neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

OK, maybe error wasn't the best word - other cad packages do the same thing  - 
perhaps "confusing" is better..

I still don't get this signal level issue. The 5530s have a Vdd of 11V, that 
makes their Vih 9V, not 4.3V which is the PIC's Voh.

The fact that the 5530s make work with a Vdd of 5V is not the issue in this 
case - Vdd is 11V.

According to their data sheet they are being driven out of spec and that 
correct operation under these conditions is not guaranteed...

Nick

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Re: [neonixie-l] Neon Signs

[Nick de Smith]

Not the wrong place at all. There are Neon tube testers, small battery powered 
units, that can test to see it if the tubes are OK.

Where abouts are you located - there may at be a member near you who can help 
or lend you a tester...

Nick

On 13 May 2016 00:02:52 BST, Tom Harris  wrote:
>Sorry if this is the wrong group. I have been offered a large quantity
>of
>vintage neon tubes from old signs, "burgers", "restaurant" "cafe", that
>sort of thing, together with straight & curved lines. How do I find out
>the
>value? I can test them.
>
>Tom Harris 
>
><https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
>Virus-free.
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[neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

On Thursday, 12 May 2016 19:30:12 UTC+1, Niek wrote:
>
> If that's indeed the issue, it's not surprising that the chip would break 
> after a while, though it's still a little surprising that it would lead to 
> this behavior. But I guess it's possible if the code isn't doing any sanity 
> checks on the data it's receiving and perhaps even relies on it to 
> determine when to stop writing into an array or something like that, 
> overwriting other parts of the memory.


The MAX232 is powered - its a schematic error - in the older (original) 
NixiSat the OnCore unit connects via J4 - the upgraded unit uses an 
external Haicom HI-204III GPS puck that uses J3 and the MAX232 - works just 
fine.

The bottom line is that the schematic has problems, i.e. the lack of level 
shifters, however that should not detract from the fact that Jeff made 
wonderful clocks, and I for one am very grateful that I've had years of 
pleasure from my NixiSat...

Hopefully, it'll keep going for many more years yet !

Nick

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Re: [neonixie-l] My NixiChron is sick, what do I do?

[Nick]

OK - I've looked at my NixiSat schematic, and although the 5530 symbol 
implies that Vdd is connected to +5V, it's actually connected to a rail 
called... VDD which in turn goes directly to the input jack via a 1N4741 
11V Zener and a 100R resistor, i.e. if Vin from the wall wart is truly 12V 
(as it should be), then VDD should be 11V.

This is still driving the 5530s way out of spec, as the drive logic from 
the PIC is standard TTL with a 5V Vcc. Vih should be Vdd-2, i.e. 9V in this 
case, and it'll be nothing like that.

For the PIC, Vol = 0.2V and Voh is Vcc-0.7, i.e. 4V3 and only half what the 
datasheet says the 5530 needs in this use case.

One idea might be rotating the 5530s around and seeing if the problem moves 
with the driver...

Whatever happens, there are no level shifters and it "just worked", so that 
was OK then :)

Nick

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Re: [neonixie-l] My NixiChron is sick, what do I do?

[Nick]

Vdd on the 5530 should be about 12V - the schematic snippet implies that Vdd is 
5V - the data sheet explicitly states that normal operation is not guaranteed 
with Vdd below 10.8V.

It may have worked at 5V, but that's just luck... over time, who knows what 
else has drifted..

Nick

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[neonixie-l] Re: OT: Need a technical letter translated from German to English...

[Nick]

Many thanks Jonathan, you were a life-save !

Cheers

Nick

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[neonixie-l] Re: Thought I'd share

[Nick]

Very sweet - "cool" design - like it a lot !

I hope you have those clocks mentioned on your insurance - some of mine are 
- when you add up the cost of those tubes etc., it gets a bit scary...

Cheers

Nick

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[neonixie-l] OT: Need a technical letter translated from German to English...

[Nick]

Hi,

I need a favour :) I have a technical letter about some special/custom 
valve audio output transformers that I need translated from German into 
English - Google Translate simply doesn't have the vocabulary...

It's about a page and a bit - the letter is typewritten (it was 1996 after 
all) - I can scan it to PDF... Because the detail is important, it really 
needs a proper translation...

Any help would be much appreciated ! A favour would be owed :)

Thanks

Nick

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[neonixie-l] Re: My NixiChron is sick, what do I do?

[Nick]

Hi - Welcome to the group - this is indeed the correct place to ask this 
question.

Jeff is unfortunately no longer with us, but there are folk here who know 
his work well and may be able to help. I have one of his NixiSat clocks - a 
thing of beauty - which has pride of place in our house - I had to restore 
that a few years ago, luckily Jeff was still around then - 
https://groups.google.com/d/msg/neonixie-l/evzX0noEGXg/JrVaZG3YFogJ  
<https://groups.google.com/d/msg/neonixie-l/evzX0noEGXg/JrVaZG3YFogJ>

Good luck - no doubt other will be along shortly...

Cheers

Nick 

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[neonixie-l] Re: You have been added to neoni...@groups.io

[Nick]

PEOPLE ! PLEASE STOP SUBSCRIBING TO THE GROUPS.IO GROUP !

There is absolutely no point in subscribing to it - everyone has 
read-access and no posting is allowed. It's highly unlikely that it'll ever 
be an active group!

Cheers

Nick

On Wednesday, 20 April 2016 08:06:21 UTC+1, Nick wrote:
>
> Hi - Yes - I've archived/shodowed the entire Yahoo! neonixie-l group at 
> Groups.io - they would have sent emails to the Yahoo! group as part of this 
> and that would them be forwarded to the Google group as the Google group is 
> subscribed to the Yahoo! one...
>
> Hope that make it clear! Irritating, isn't it. I try to sort out stuff 
> behind the scenes, then something goes a bit pair-shaped... :)
>
> Don't worry about it - the message is genuine, but just ignore it - no-one 
> can post to the Groups.io shadow anyway...
>
> Cheers
>
> Nick
>

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[neonixie-l] Re: You have been added to neoni...@groups.io

[Nick]

Hi - Yes - I've archived/shodowed the entire Yahoo! neonixie-l group at 
Groups.io - they would have sent emails to the Yahoo! group as part of this 
and that would them be forwarded to the Google group as the Google group is 
subscribed to the Yahoo! one...

Hope that make it clear! Irritating, isn't it. I try to sort out stuff 
behind the scenes, then something goes a bit pair-shaped... :)

Don't worry about it - the message is genuine, but just ignore it - no-one 
can port to the Groups.io shadow anyway...

Cheers

Nick

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[neonixie-l] Yahoo being sold...

[Nick]

As many will be aware, Yahoo is up for sale.

It's likely that the new owners will only be interested in the bits that 
make money, and Yahoo! Groups is unlikely to be part of that...

I have saved a copy of all the Yahoo! group files (incl. directories) and 
messages in a Google Docs folder that I'll make available to the group.

472 files in 91 folders - total is only 74.7 Mb.

It's time this group had a files section... :)

Cheers

Nick (moderator)

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[neonixie-l] Re: Crowdfunding for vacuum tubes/nixie/neon/scientific glassblowing workshop

[Nick]

Hi Lukas,

I like the idea, but I've tried hot glass work, and it's really tricky to 
do well - you don't say on the funding page what your experience or skills 
are like (other than you work in the NHS) - do you have any examples of 
your work?

As you probably know, at least one other member is doing exactly this type 
of work, Dalibor Farny - http://www.daliborfarny.com/ - and its taken him 
years of hard graft to get to the stage he's at.

More people doing this is great - just that if we're investing in you, I 
for one would like to know a bit more :)

Cheers

Nick

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[neonixie-l] Re: Unnkown Nixie

[Nick]

Looks a bit like a B5991, but the clips on the top of the cathode supports 
is slightly different

One of that series though - the size & shape are right...

Nick

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[neonixie-l] Re: Trying to Locate Nixie Vendor

[Nick]

Me too. I emailed him and raised a support ticket about my ITS1A clock over a 
month ago. No answer...

Nick

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Re: [neonixie-l] Re: Dekatron T-Shirt

[Nick de Smith]

Hi Keith,

Nothing wrong with a modest bit of advertising so long as it's relevant. 
Spamming, of course, will be dealt with most harshly :)

Cheers

Nick

On 24 March 2016 12:38:12 GMT+00:00, Keith Moore  wrote:
>This is my shirt. Please order it from me, and *not this fraudulent
>seller*. 
>This is one of many reasons I am in the process of creating these OFF
>from 
>CafePress. CafePress has thieves who run around and just sell your
>designs 
>on their site without any compensation. This, and the limitations of
>the 
>print size and stuff mean that I am in the process of moving to a new
>sales 
>site this summer.  
>Check out the magic eye shirts, too. 
>
>I have had these out there for over a year, but I was trying to respect
>the 
>community by not advertising here.   I will be contacting CafePress yet
>
>again to submit a cease and desist to these guys for stealing and
>selling 
>MY SHIRT.  
>
>
>http://www.cafepress.com/thecourtjester
>
>Dekatron shirts - http://www.cafepress.com/thecourtjester/11101119
>
>Magic Eye Shirts - http://www.cafepress.com/thecourtjester/11101073
>
>- Keith 
>
>
>
>On Wednesday, March 23, 2016 at 8:45:21 PM UTC-4, threeneurons wrote:
>>
>> Dekatron T-shirt anyone ? 
>>
>>
>> Though I have equipment for silkscreening T-shirts, it ain't mine.
>>
>
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Re: [neonixie-l] My Page - What do you think?

[Nick de Smith]

A. You need more SMPS fu, young John...

That PSU is very familiar...

Nick

On 22 March 2016 21:56:58 GMT+00:00, Quixotic Nixotic  
wrote:
>
>On 22 Mar 2016, at 20:55, Nick wrote:
>
>> Very nice. Small point -shouldn't R17 be connected to +12V ?
>> 
>> Nick
>
>In my case it doesn't seem to make any damned difference - I can never
>get those Max1771s to play nicely.
>
>John S
>
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[neonixie-l] My Page - What do you think?

[Nick]

Very nice. Small point -shouldn't R17 be connected to +12V ?

Nick

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[neonixie-l] Racal 836 Nixie Universal Counter-Timer

[Nick]

Very nice Thomas - good to see it working again.

Cheers

Nick

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[neonixie-l] Re: VFD pen

[Nick]

Interesting! They say "Discontinued in 1990, Gelfman acquired the world’s 
remaining IV-21 VFD tubes."

Not mine, they didn't !

Nick

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[neonixie-l] Re: Why were dekatrons still manufactured as recently as 1992 ?

[Nick Sargeant]

I was in Lithuania in the early 90s, shortly after the exit of the 
Russians. There were factories there still making ICs and stockpiling them, 
even though the products they were targeted for were history. As I recall, 
they were making DEC VAX clones, and that is what the ICs were aiming for. 
Since I was working for IBM at the time, talking to the Ministry of 
Informatics about their grand plan to take our PowerPC motherboards, it was 
all very strange. 

Mind you, their unemployment level was close to 0%. 

On Tuesday, 15 March 2016 21:47:14 UTC, gregebert wrote:
>
> I bought a few spare A-101's and at least one had a 1992 manufacturing 
> date.
>
> So I'm wondering what could the former Soviet Union have needed with such 
> old technology in the 1990's ? I would have expected that they would have 
> replaced all their dekatron equipment by then, so even spare tubes should 
> not have been needed. Or, am I entirely wrong and they continued to use 
> 1950's era technology for another 30-40 years ?
>
> Or perhaps was there rampant waste & excess that old factories kept 
> churning-out obsolete devices, only to store them in warehouses, just to 
> keep workers employed ?
>
> Too bad the soviets didn't make tons of CD47's
>

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[neonixie-l] OT: RPi 3 + Occulus Rift

[Nick]

Been playing with some of these, connecting them to an Oculus Rift for a 
robotics project...

Mean bits of kit - the Pi 3 is a wonderful card - USD 35, includes WiFi, 
BT, 4 x USB, Ethernet, HDMI, 64-bit, quad code 1.2GHz ARM 8 etc. etc. still 
only the size of a credit card and the same price as the Pi 2B+ though much 
more feature rich & a lot faster.Only downside (slight) is 1Gb RAM - more 
than enough for Linux.

Getting to really like it...

Nick

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Re: [neonixie-l] Used or NOS?

[Nick]

On Tuesday, 15 March 2016 17:31:44 UTC, Jens Boos wrote:
>
> I don't think it would be counter-productive, see e.g. the XN-1. Neon and 
> argon are noble gases and hence they almost don't interact with getter 
> material, as far as I know
>

Yup - I can buy that...

Nick 

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Re: [neonixie-l] Used or NOS?

[Nick]

Why would they have a getter? An Hg pill that needs to be vaporized, sure. 
But a getter? They are used to remove any stray gas molecules given off by 
the glass or internal structures due to heat & time.

Nixies are gassed tubes by definition - a getter would be 
counter-productive - even during baking and initial evacuation prior to 
backfilling, you wouldn't use a getter.

Nick


On Monday, 14 March 2016 01:15:28 UTC, jrehwin wrote:
>
> Nixies are not vacuum tubes - they shouldn't have a getter.
>
>
> Actually, some nixies do have a getter, but it's a different kind of 
> getter than vacuum tubes use, naturally.  Most of the ones with getters use 
> "pill" getters, often on the back of the anode, and there's normally no 
> "getter flash" on the glass.
>
>
> http://www.tubeclockdb.com/images/stories/2012/in-18-bd/in-18-nixie-clock-6.jpg
>
> - John
>
>

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Re: [neonixie-l] Re: Used or NOS?

[Nick]

Nixies are not vacuum tubes - they shouldn't have a getter.

Nick

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[neonixie-l] Re: Good B7971s?

[Nick]

It's pretty much impossible to re-gas a nixie, not to mention being dangerous 
due to the Hg.

I tried doing this with an outgassed tube helped by a really expert hot-glass 
specialist.

We failed, probably on the annealing. The glass cracked.

Nick

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[neonixie-l] Re: Good B7971s?

[Nick]

On Tuesday, 8 March 2016 17:21:10 UTC, Jonathan F. wrote:
>
> I have only 5 of them, one has a bottom segmet that illuminate a orange 
> cloud around it, possibly touching the grid or the back. I will try to 
> smack it.
>
> Btw... what kind of gasses were used in these tubes? At which pressure?
>

Neon with a small amount of Argon (maybe 5%) and possibly a trace of 
Mercury (nearly all later tubes have Hg doping - it almost eliminates 
sputtering and thus drastically improves the life of the tube). Pressure is 
between 5 & 30 Torr (about 1/25th of an atmosphere).

HTH

Nick  

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[neonixie-l] Re: Good B7971s?

[Nick]

The tubes will have been burnt-in for some time after manufacture for QC 
checks... maybe that'd be enough to cause the shading?

Nick

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[neonixie-l] Re: Good B7971s?

[Nick]

Hi John,

I remember these - we all discussed them a while back - ISTR that we 
couldn;t really decide if they were new or not - the consensus was, as you 
say, that they were probably pulls put back in the "new" trays - a lot of 
these seem to have been swapped at a set time, just in case - bearing in 
mind that they were mainly used in stock tickers, failure wasn't an option. 
The tubes are fine, and as many have found, they seem to go on for ever...

Nick 

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RE: [neonixie-l] Bad B7971's

[Nick]

Odd this. I bought substantial batches of these (in the several 100s) from the 
guy that originally owned pretty much the world's supply many years ago - apart 
from those that broke in transit due to very poor packing, I've never had a 
failure.

Where are all these different tubes coming from...?

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Re: [neonixie-l] Small neon bulbs 50 for $5

[Nick]

Hi Yan - I've several 100 5440As too - if you are looking for stock, drop 
me a line.

Cheers

Nick

On Thursday, 3 March 2016 05:03:32 UTC, 严泽远 wrote:
>
> Hi guys, yes it's me, I bought thousands of them from a local reseller two 
> years ago, especially 3mm neon lamps is perfect for tubes which diameter is 
> 18-19mm.
>
> BTW, I have sold 41pcs Divergence Meter and no much NL5440A tubes left, I 
> think it's hard to find more brand new NL5440A tubes ;-(
>
>
> https://www.google.com/maps/d/edit?mid=zvNNMViKyRYM.kXz-sw7u9aV8&usp=sharing
>
> Yan.
>
> 在 2016年3月3日星期四 UTC+8上午6:28:10，charles写道：
>>
>> On 16-03-02 12:53 PM, John Rehwinkel wrote: 
>>
>> > That's Yan, 
>> >   I'm so tempted to buy one of his Divergence Meters, but I built one 
>> of 
>> > my own and do I really need two? 
>>
>> but don't you need a "divergence reference" to keep up with the 
>> calibration requirments?  ;) 
>>
>>
>> -- 
>> Charles MacDonald Stittsville Ontario 
>> cm...@zeusprune.ca  Just Beyond the Fringe 
>> No Microsoft Products were used in sending this e-mail. 
>>
>

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[neonixie-l] Nice nixie project...

[Nick]

http://www.diyaudio.com/forums/tubes-valves/281206-retro-nixie-volume-indicator.html

Nick

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[neonixie-l] IN-36 Stereo Bargraph Panaplex driving help

[Nick]

https://groups.google.com/forum/m/#!topic/neonixie-l/Y4P9lU5YyN0

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Re: [neonixie-l] Small neon bulbs 50 for $5

[Nick]

Ummm... If John is up for a bag or two, any chance of me too? Pretty please?

Ta

Nick

On Saturday, 13 February 2016 20:50:41 UTC, Pramanicin wrote:
>
> Thanks John! I picked some upbargain!
>
> Sent from my iPhone
>
> On Feb 13, 2016, at 08:51, John Rehwinkel  wrote:
>
> Electronic Goldmine has a sale on small (10mm long, 3.8mm diameter) neon 
> bulbs, fifty for US$5 until the 15th:
>
> http://www.goldmine-elec-products.com/prodinfo.asp?number=G20996A
>
> - John
>
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