RE: [neonixie-l] Q: Gold colored coating on surface mount contacts

When "we" were manufacturing in the '90s the safe storage time for SMD was around 3 to 6 mths. Surfaces weren't 'fresh' after that. Some was wave soldered some reflow. If that is a slow moving component then maybe they coated it with a solder-thru protective layer? Doesn't seem like they used a

RE: [neonixie-l] So do you guys think I'll be getting this watch I just bought off ebay???

??? It was $1 Buy-it_Now. On Saturday, August 17, 2019 at 3:38:01 AM UTC-5, johnk wrote: What did he think would happen if he didn’t use a high starting price? Can’t have his cake and eat it too! I guess he doesn’t know what an auction is either L( John K. From: neoni

RE: [neonixie-l] So do you guys think I'll be getting this watch I just bought off ebay???

What did he think would happen if he didn’t use a high starting price? Can’t have his cake and eat it too! I guess he doesn’t know what an auction is either L( John K. From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of Bill Notfaded Sent: Saturday, 17

RE: [neonixie-l] So do you guys think I'll be getting this watch I just bought off ebay???

It means that he wanted to list "quite a few" items and had to use low starting prices. I guess the one in question didn't get bidded-up. The aggregate list value meant that he chose to risk not starting high. Or am I missing a point here? John k -Original Message- From:

RE: [neonixie-l] power supplies and radio interference

Sigh, Tempest. "We" used to service some Tempest spec sites. Btw, you need a security clearance to be able to access/read the spec too :-)) And, some of our guys just would not keep the spares cabinet locked. I agree that shielding/filtering the supply is not impossible, but is so much harder

RE: [neonixie-l] power supplies and radio interference

-emission switching supply. It takes time and care and shielding. High voltage is more of a challenge. On Fri, Aug 16, 2019, 12:27 AM johnk wrote: >From time to time I come across discussions where radio restorers [domestic >and mil] want a low current valve-voltage (tube-voltage)

[neonixie-l] power supplies and radio interference

>From time to time I come across discussions where radio restorers [domestic and mil] want a low current valve-voltage (tube-voltage) power supply. I often suggest that they look at the various Nixie supplies discussed here. The usual response is along the lines that ANY "switching" or

RE: [neonixie-l] audiophiles are crazy...

I think that you will find they truly believe in the Western Electric reels of vintage solder that pop up from time to time. John K -Original Message- From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of lokna...@gmail.com Sent: Wednesday, 29 May 2019

RE: [neonixie-l] "TEL" dekatron

Haven’t seen one. I wouldn’t be surprised if it is a stores item procured well after the hey-day of tubes. There are many examples of tubes/valves with CV numbers amateurishly stamped on them. The stamping rarely meets the requirements of K1001 standard. Maybe someone used his kid’s rubber

RE: [neonixie-l] Re: First nixie clock: do I need to switch anode?

Well, what can we say? I suspect that he knows Spinal Tap and maybe HE was the interviewer J https://www.youtube.com/watch?v=4xgx4k83zzc BTW, Justin, I hope you caught my recent diatribe on Watts and Watts RMS. John Kaesehagen Australia From: neonixie-l@googlegroups.com

RE: [neonixie-l] OT: LED light bulb teardown

They interest me too. I do troubleshooting for a mate who imports LED lights. When you pull apart OR store the LEDs make sure that you do not put any real pressure on the soft rubbery potting/encapsulation of the LEDs. COB LEDs are easily damaged – the bonding wires are delicate. Some

RE: [neonixie-l] OT: audio levels

użytkownik johnk napisał: Well, how do I say this Thomas? It is NOT to be called Watts RMS ! They left the vital word out – it is Watts [RMS derived]. They left out “derived”. The RMS volts and RMS amps that you mention when multiplied together produce Watts. Just plain Watts. These Watts

RE: [neonixie-l] OT: audio levels

: [neonixie-l] OT: audio levels W dniu piątek, 29 marca 2019 08:46:37 UTC+1 użytkownik charles napisał: On 2019-03-28 10:09 p.m., johnk wrote: based on teh RMS output (.707 of the peak) That would be 0,707 (1/sqrt(2)) voltage output on a resistive load. RMS power of a sine wave is 0,5 times

RE: [neonixie-l] OT: Help buying banana sockets manufactured by Abbattron / HH Smith, anyone?

Martin, let’s see what offers you get first. I inherited many cubic metres of parts and semi-dismantled equipment about six years ago. [You “knew” the guy slightly from AVO discussions iirc – from Adelaide.] I sorted a lot of it while the experience was a bit novel. I didn’t get back to it

RE: [neonixie-l] Re: ZM1050 / Z550M

? Richard On Sun, 14 Apr 2019, 06:22 johnk, wrote: A bunch of my email delivery posts are out of order and missing some [for lots of groups]. I’ll comment anyway. Notice that there is no smoothing capacitor in that diagram [if we are looking at the same one]. This means

RE: [neonixie-l] Re: ZM1050 / Z550M

A bunch of my email delivery posts are out of order and missing some [for lots of groups]. I’ll comment anyway. Notice that there is no smoothing capacitor in that diagram [if we are looking at the same one]. This means that with the halfwave rectifier you are going to get pulsed DC rising

RE: [neonixie-l] Mystery tube

I have come in late on this. Martin will be right. It does look similar to the Hamamatsu thingo. I was going to suggest it is a flash tube for the StroboTac or similar. [but that should glow I suppose]. I love doing "whatsits". John K -Original Message- From:

RE: [neonixie-l] OT: Duracell power bank

Has anyone noticed the eBay offerings of HUGE mAH banks? 50,000, 100,000, 33 etc ! One listing says the capacity is based on “theoretical maximum ” - a new theory perhaps? They are the same size and weight as the smaller ones. There are teardowns on the web and youtube showing the

RE: [neonixie-l] Another Tube Hobby Failure

Michael, I have to comment on the logic here. You say you have one that is quite OK and seem to use that fact to rule out the effects mentioned by Nick. Actually, I consider that the parasitic oscillations idea is reinforced by your fact, not denied by it. When a circuit is on the verge of

RE: [neonixie-l] OT: audio levels

te handy for building a simple (not professional) VU meter. Lots of things to read for me! Best wishes Jens On 2019-03-28 8:10 a.m., johnk wrote: > Hey Jens... > > 1). Don't call it VU unless you match the actual ballistics of the > ORIGINAL VU meter > > 2). Europe tends to us

RE: [neonixie-l] OT: audio levels

Hey Jens... 1). Don't call it VU unless you match the actual ballistics of the ORIGINAL VU meter 2). Europe tends to use a PPM [quasi-peak] system. Peak Program Meter. 3). Consumer and pro levels are very different. They are often misunderstood and hence mounds of garbage appear on the web.

RE: [neonixie-l] Re: Q: Active full-wave rectifiers

And I’d ask about mains stability. Was half-wave ruled out? John K From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of petehand Sent: Monday, 25 March 2019 18:43 To: neonixie-l Subject: [neonixie-l] Re: Q: Active full-wave rectifiers I would use

RE: [neonixie-l] Re: How dangerous is 150V - 170V DC?

I was involved in the testing of Residual Current Detector designs in the ‘90s. I know that you are discussing the DC at present but you guys also play with AC. When it comes to a shock the path of the current is very important. Research the topic a bit. AC and DC. It is surprisingly complex.

Re: [neonixie-l] NL-50944 Infos?

Great value in that reminder Gaston; well done. Another regulator arrangement that needs great care is this. I have seen instances where the shunt regulator is designed to deal with the expected change in current in the load. For instance the load might always draw at least 70mA and never more

Re: [neonixie-l] Re: Half-digit neon bulb 25/15 mm long

The web is full of fact and OPINION so be careful which content you choose to believe [we all know this]. AFAIK the usual electros that we encounter are not a PCB problem, but ARE various other problems. If standard electros have PCB content I definitely want to know - but I really avoid

Re: [neonixie-l] How many push-buttons for settings?

An aside: If that board gets buried in a hard to open box, consider "gluing" the clear plastic sides on those 3mm sockets. It sometimes doesn't take very much angled force on the plug [like a cable pull] to pop the side off. John K - Original Message - From: newxito To:

Re: [neonixie-l] Weird display (possibly OT)

Reminds me of the stacked number [globe lit, prob not neon lit] display in the frequency counter by [probably] Advance. I have one but it is buried right now. There used to be a photo in the 'old' photos section. Couldn't spot one quickly with a web search. John K - Original Message

Re: [neonixie-l] Re: PV Electronics R568 Clock Project With Black R|Z568M Nixie Tubes

Bit of a note re static. There is more to behaving properly than you might think. -The IC tubes known as 'antistatic' were just coated so that the triboelectric effect was less. Those tubes were not protection against local static discharges. - read up on Faraday shielding. And the

Re: [neonixie-l] Re: tubes/valves and Global Shipping

[I am a bit behind in my reading :-) ] Didn't someone [here or TCA Group] say that those twits are judging mercury content by the 'mirroring' seen on a tube? [and/or just its era.] Any getter flash etc will be mistaken. John K. - Original Message - From: Manuel Azevedo To:

Re: [neonixie-l] Something a little different

And what mains voltage was it originally intended for? John K - Original Message - From: Paul Andrews To: neonixie-l Sent: Friday, June 30, 2017 7:23 AM Subject: [neonixie-l] Something a little different While wandering flea markets looking for nixies, or things I can put

Re: [neonixie-l] Re: tubes/valves and Global Shipping

When I mentioned "rules" I meant it as distinct from the laws and regulations. I was meaning the writing of job procedure rules that allow them to work within the laws. For example - how to tell the difference between a getter flash and mercury. Impossible though; too many reasons why it

Re: [neonixie-l] Re: tubes/valves and Global Shipping

err, I think the point is NOT TO use the Global Shipping by selecting another category, because they DO open [some/all] packages. See various stories circulating. They obviously find it easier when the description tips them off - like the guy who lost his amplifier, NOT just the valves in it.

[neonixie-l] radiation and neon bulbs [ #2]

Sorry, that earlier post just posted itself before I finished :-) So:- I saw this post by Joe Sousa over at TCA Group. Mailed him about posting here but no reply (yet). Joe was a member of the Yahoo Group, no idea if he still follows now. John K Australia. Joe's post "I have surveyed

[neonixie-l] radiation and neon bulbs

I saw this post by Joe Sousa over at TCA Group. -- 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,

[neonixie-l] tubes/valves and Global Shipping

There have been a few stories told on a few Groups about ebay Global Shipping. Saw this just now at TCA First Post. http://www.ebay.com/itm/Mullard-ECC33-NOS-Valvo-Amperex-1958-D-Getter-6SN7-GT-Vacuum-Tube-Valve-MDGGZ-/332275838610?hash=item4d5d2eee92:g:lmMAAOSw3v5YpJGn Am I missing

Re: [neonixie-l] Re: LIXIE DISPLAYS

"In case you're wondering, I have thought of 3D printing a mechanical gear-clock but I have not yet figured out how I want to put nixies in it" Well, how about using up a bunch of dud Nixies? Use ones with faulty digits and just rotate [carousel arrangement] a working one into

Re: [neonixie-l] Re: LIXIE DISPLAYS

There are "tricks" to cleaning ordinary relay contacts, but I am assuming that you mean the stepper relays here? Stepper relays are usually exceedingly reliable right to the point where the contacting metal is worn away. There is a caveat though - the voltage needs to be high (eg 48V) and the

Re: [neonixie-l] Re: A Couple of Oddities

Have a look at Jeremy's beaut pages http://www.tubecollector.org/exhibits.php?cat=33 John K Australia. - Original Message - From: Roddy Scott To: neonixie-l Sent: Thursday, June 22, 2017 1:55 AM Subject: [neonixie-l] Re: A Couple of Oddities The VS10Gs are Ericsson

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

I had to google that. A friends little kids used to say that when they passed gas! On Thursday, June 8, 2017 at 9:50:12 AM UTC-5, johnk wrote: Well you said/he said "My old man had a saying: 'Cheap at half the price!'. " BUT I suspect that you mean he m

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

Well you said/he said "My old man had a saying: 'Cheap at half the price!'. " BUT I suspect that you mean he might have said Cheap at Twice the Price when he meant a bargain. Dear at Half the Price is said too for when it ISN'T a bargain.. I can remember when I was doing tech work at a radio

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

I have a clock using NL 8091. It is a Systron Donner master display that could also drive a slave [or more?]. I posted details in th eold Yahoo group. Googling this " not-small nixies in Systron Donner model 8181 clock display " will get some of it. I looked at the old group photos and can't

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

Glass cracks tend to travel. I wonder if the ' glue ' they use for car windscreen cracks might help? John K Australia - Original Message - From: Robert L To: neonixie-l Sent: Thursday, June 08, 2017 4:18 AM Subject: [neonixie-l] Re: Well I tried, big tubes on ebay this am

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

err, watch the potential there. Scope earthed/grounded? Scope floating? HV supply earth/gnd referenced? Maybe a different technique for a non-EE? John K - Original Message - From: "Instrument Resources of America" To: Sent:

Re: [neonixie-l] B5750 Nixie tubes for sale in a week or two...

PayPal oftens pays for returns. But it might give a black mark. John K - Original Message - From: Craig Smith To: neonixie-l Sent: Saturday, May 20, 2017 3:04 AM Subject: [neonixie-l] B5750 Nixie tubes for sale in a week or two... OK, I saw an auction on eBay for B5870

Re: [neonixie-l] eBay GSP disposes of CRT for no reason

Wonder if any of their lighting is fluorescent tubes :-) John K - Original Message - From: Instrument Resources of America To: neonixie-l@googlegroups.com Sent: Tuesday, May 16, 2017 10:26 AM Subject: Re: [neonixie-l] eBay GSP disposes of CRT for no reason From the way

Re: [neonixie-l] Video with nixies display in old secret place

Seem to remember an effort to put clips and pics into one folder though - but whether that was before or after AJ (?) revamped the albums. John K - Original Message - From: "Nick" To: "neonixie-l" Sent: Monday, April 24, 2017 9:25 AM

Re: [neonixie-l] Re: Manufacturing affordable large, new nixie tubes

Yep, wonderful stuff and I was aware of it. By Dalibor's work I meant more than the production -sorry, me being language-lazy. The tantalizing stills at the start and of the move to the castle are more the thing I meant. A complete "life of..." I guess :-)) The everyday things that don't

Re: [neonixie-l] Re: Manufacturing affordable large, new nixie tubes

I do not know how to properly applaud Dalibor. It seems such an empty thing coming from myself. I am just an observer. However, I am so absolutely impressed with what he has done. It quite goes beyond the obsessive amateur radio guys filling a room with gear, the amateur scale-railroad

Re: [neonixie-l] Manufacturing affordable large, new nixie tubes

, and they're more reputable too. High-quality parts would equate to less of a headache. On Wed, Apr 19, 2017 at 10:37 PM, JohnK <yend...@internode.on.net> wrote: Hmm, are you talking QA or QC? By 'product engineer' you make it sound as if you think you can treat the process like a '

Re: [neonixie-l] Manufacturing affordable large, new nixie tubes

Hah! It isn't really about the QM, it is about the technology and the engineering knowledge. Your "we" had better have some real engineers in it! You are sounding more and more like a "Product Manager" as we call them out here. Once all the technologically-required steps are known, we get the

Re: [neonixie-l] Constant current source design

I told this story here to the previous generation of readers... In a facility where I worked for a few years back in the mid-1970s there was also a two-rack-cabinet trigger tube monster. Its task was to check the teletype data that was arriving over an HF radio network. When [parity] errors were

Re: [neonixie-l] Manufacturing affordable large, new nixie tubes

Hmm, are you talking QA or QC? By 'product engineer' you make it sound as if you think you can treat the process like a 'recipe'. You are relying on experts in the various fields required rather than having any direct knowledge yourself? High quality components can make a high quality dud too

Re: [neonixie-l] Video Tipps for Nixie Clocks...

Well, the programs just make dodging, burning, fading, silver mask jobs etc easier. Nothing wrong with using all the tools - there are some subjects that can't be photographed well enough no matter what the photographer's skills. Just because air-brushing was overused doesn't outlaw it. Face it

Re: [neonixie-l] Re: Constant current source design

be 195. Am I missing something? On Apr 1, 2017, at 9:42 AM, JohnK <yend...@internode.on.net> wrote: I suspect that he meant if you wanted the 1ve supply, then the devices he mentioned give it easily directly from your low voltage supply - I don't think he meant you to use up your

[neonixie-l] loose-pin sockets

What is the latest on low stress sockets? 3D printer ones coming along? I am keen to hear from you all about the latest successes. Anyone contemplating a ZIF style - either rotate or slide locking etc? John K -- You received this message because you are subscribed to the Google Groups

Re: [neonixie-l] Re: Constant current source design

I suspect that he meant if you wanted the 1ve supply, then the devices he mentioned give it easily directly from your low voltage supply - I don't think he meant you to use up your precious High Voltage. Presumably you are running the high voltage generator DCDC conv off a low voltage? You

Re: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

Yeah Chuck.. but the interesting thing is that it is supposedly very closely based on a TI ap note or some such. I was looking forward to some input from the seller. But maybe this is public and wasn't "addressed" to him. Still think it is/was in his interest to comment though. John K -

Re: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

Good outcome. I wondered what had happened. Saw what you meant as soon as I looked at the docs. At least you know what tweaks to do if anymore funnies turn up [ageing, temperature etc]. You can often scavenge the old parts from recycling centres if they haven't actually chewed up the boards for

Re: [neonixie-l] Lixies/Tixie Clock

roups/NEONIXIE-L/info John K. - Original Message - From: Paul Andrews To: neonixie-l Sent: Saturday, March 25, 2017 2:04 PM Subject: Re: [neonixie-l] Lixies/Tixie Clock What files/photos section? i.e. How do we access that? On Friday, March 24, 2017 at 5:07:36 AM UTC-4

Re: [neonixie-l] Lixies/Tixie Clock

Some of you might like what you see in the files/photos section of this Google Group or the old Yahoo Group - pics of non-nixie displays and lots of interesting stuff. John K - Original Message - From: Manuel Azevedo To: neonixie-l@googlegroups.com Sent: Friday, March 24,

Re: [neonixie-l] Lixies/Tixie Clock

I am really surprised that no-one has mentioned the you-know-who saga. John K. - Original Message - From: Nick To: neonixie-l Sent: Wednesday, March 22, 2017 4:02 PM Subject: Re: [neonixie-l] Lixies/Tixie Clock On Wednesday, 22 March 2017 09:13:31 UTC+4, gregebert wrote:

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: Taylor Edge Nixie Clock Kit

Well, I was waiting off for other comments to surface or for the kit supplier to pipe up. I see a few choices:- - contact the supplier for comment - measure waveforms/ logic levels and act accordingly - try specially selecting 74LSxx that work in the location [might be temperamental with age,

Re: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

OK, so now I looked at the schematic you posted [it is a slightly changed TI ap it seems]. I took it at face value that the BOM was correct, but I don't see one in that pdf you attached. The schematic uses 7400 series. There are "Changes to original..." at top left of sheet 4. In those

Re: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

Very very good advice from Nick in these two posts. Changing like-for-like or interchanging if easy is valid - modifications aren't. [Unless you deduce something from a *temporary* mod to allow you to fix the original problem.] I have had to deal with the fallout from bad approaches: "We"

Re: [neonixie-l] Re: Wanted: best few photos of Nixies in military equipment

what you are after but a poke round this site and associated links might be worthwhile. http://watkins-johnson.terryo.org/surveillance-systems/RS-160/RS-160.htm DaveB, NZ From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of JohnK Sent: Thursday

[neonixie-l] Wanted: best few photos of Nixies in military equipment

I would like to get a few good pictures of Nixies in military equipment [not expecting it to be mobile stuff].Preferably not generally available test equipment but could be support equipment in the Defence industry. Can anyone point to their favourites please? John Kaesehagen Australia -- You

Re: [neonixie-l] Re: How ICs are made - the inside track...

Subject: Re: [neonixie-l] Re: How ICs are made - the inside track... 27ft/s seems high, see here: https://en.wikipedia.org/wiki/Drift_velocity#Numerical_example Jens On 1/26/2017 9:28 PM, JohnK wrote: Many years ago [50] in school physics we were told 27 feet per second for 'electrons' in w

Re: [neonixie-l] Re: How ICs are made - the inside track...

Many years ago [50] in school physics we were told 27 feet per second for 'electrons' in wire and to treat "data/information" transfer like a long tube full of ping-pong balls where you push one in at this end and one falls out at the other. John K - Original Message - From:

Re: [neonixie-l] Re: IN-13 Lifespan

I too want to see the results of the post mortem. What IS the mechanical reason for the spacer being free? Please tell. John K - Original Message - From: Jon To: neonixie-l Sent: Tuesday, January 24, 2017 8:27 AM Subject: [neonixie-l] Re: IN-13 Lifespan Sounds like a

Re: [neonixie-l] IN-13 Lifespan

But, if you get the maths right you can actually mimic the response. [I have audio and broadcast radio station background btw] Been here before with this argument of course. So, it is possible to get the same indication but that leaves the semantics to deal with. And there are subtle aspects of

Re: [neonixie-l] NE-2 bulbs dont last forever

I saw a situation with a local power outlet manufacturer back in the 1990s. The Neons in the outlet normally lasted for years.. then a batch lasted for a few weeks before they went black. The same value resistor was used [and anyway, some of the 'new' bulbs were fitted to old flushplates to

Re: [neonixie-l] Re: b7971 segment current

I haven't looked at electro specs closely since the mid '90s. I was involved with a product that used a conventional aluminium electro in an apparently undemanding application. The value was 10uF and variously two types were used- a 10VDC and a 25VDC [ or a bit higher - I forget]. The DC

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

Try this... https://en.wikipedia.org/wiki/Krypton-85 You might be surprised at the number of tubes that over the years have had 'radioactive' contents. Many gas discharge devices had it added to regularise the characteristics for light/dark operation (trigger tubes and regulators) or their

Re: [neonixie-l] Re: Nl-8091 tubes wanted

I am wondering if they are in the Systron Donner(?) clock displays? Must dig mine out and check - suspect they are a little smaller. Got mine from a mil base closure in the 90s. John K - Original Message - From: A.J. Franzman To: neonixie-l Sent: Tuesday, June 14, 2016 12:58

Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols

Build a Tesla Coil in the basement? John K - Original Message - From: Jeff Walton To: neonixie-l@googlegroups.com Sent: Sunday, March 27, 2016 2:01 PM Subject: Re: [neonixie-l] Noble gas 'Neon' Chemical Sympols Lots of basements with radon to spare... Too bad you can't

Re: [neonixie-l] Re: Off topic, but it has an orange display.. Heathkit ID-1590 anemometer

Early LEDs had even lower ratings iirc. I can remember flicking a design back where two LEDs were in parallel but opposite ways around for ac operation. The fwd volts of the illuminated one exceeded the specs for expecting long life of the other one. John K - Original Message -

Re: [neonixie-l] Used or NOS?

Ah, but four sets of closely-spaced elements in one envelope? Would it work? That is why my first reaction was that they had locally walled off the individual pairs but had left them all in one main gas container. I WANTED it to be novel like that. However, the tops are closed - note:- you

Re: [neonixie-l] Used or NOS?

Well, when I first got that valve I thought as you do. But have a look at that second photo. And, because of a previous discussion after I sent the valve to Jeremy, we have had him look at it closely - he agrees; definitely solid glass at those cut off tips. I have a second one somewhere but it

Re: [neonixie-l] Used or NOS?

/tube_zz1031.html Marcin On 16-Mar-16 14:47, JohnK wrote: OK... so why a getter in this one? All the little NEON tubes are each already sealed. http://www.tubecollector.org/zz1030.htm John K - Original Message - *From:* Instrument Resources of America <mailto:iracosa.

Re: [neonixie-l] Used or NOS?

OK... so why a getter in this one? All the little NEON tubes are each already sealed. http://www.tubecollector.org/zz1030.htm John K - Original Message - From: Instrument Resources of America To: neonixie-l@googlegroups.com Sent: Wednesday, March 16, 2016 8:18 AM Subject:

Re: [neonixie-l] Have few questions about the NIXIE watch...

I think he described/discussed the waterproofing a while back - search the posts for it. John k - Original Message - From: vfdclock To: neonixie-l Sent: Friday, March 11, 2016 6:09 PM Subject: [neonixie-l] Have few questions about the NIXIE watch... I am trying to design

Re: [neonixie-l] My CRT Clock

Just take with the chance of implosion - the glass really can fly about. Watch out for diamond rings... John K. - Original Message - From: Bill Barnes To: neonixie-l Sent: Sunday, February 28, 2016 4:42 AM Subject: [neonixie-l] My CRT Clock Hello My name is Bill Barnes. I

Re: [neonixie-l] Re: High current 1.5A x150V power supply design for 100 IN9s

supply design for 100 IN9s Humm... I am going to have to think about this ... I am not sure I will have the room for lots of little supplies. On Thursday, February 11, 2016 at 10:51:05 AM UTC+8, Zedsquared wrote: On 10/02/2016 05:24, JohnK wrote: > So, off-the-shelf mains inver

Re: [neonixie-l] Nixie safe current question

A starting point is to look at the Average current. Look at the On versus OFF times, duty cycle or whatever you want to call it. Average the current over the whole time period. eg if it is equal ON to OFF, the average would be 50% Try working it out that way as a starting point. eg the power

Re: [neonixie-l] Re: NL4998 4 digit watch

1). a shear cutter should be ok and/or 2). wrap wire around the pin [and secure with silver-bearing epoxy?] John K - Original Message - From: gregebert To: neonixie-l Sent: Wednesday, November 04, 2015 10:25 AM Subject: [neonixie-l] Re: NL4998 4 digit watch No easy

Re: [neonixie-l] Re: Help with HV5622 drivers

re Hi-z meters. A useful measurement technique is to provide a variable voltage approximating the voltage that you wish to measure. eg Potentiometer across a bench supply, with a common to the circuit under test.. You connect you meter between the point to be measured in the circuit under

Re: [neonixie-l] Re: Multiple HV5530 question

If you are going to use FPGA, then why not let it design itself? http://www.damninteresting.com/on-the-origin-of-circuits/ John K. [there are more learned refs] - Original Message - From: gregebert To: neonixie-l Sent: Monday, October 19, 2015 3:00 AM Subject: [neonixie-l]

Re: [neonixie-l] Re: Linear power supplies for nixies

One of the 'requirements' here in Australia is/was for the primary and secondaries to be on separated parts of the bobbin. I haven't looked for the 'rule', I just remember that when it was introduced the blurb with various electronic kits [and advertisements] highlighted the fact that the mains

Re: [neonixie-l] smps protection question

I agree with Greg that loops are troublesome; I would like a bit more info from Bob actually. [Drawings, photos, (off-list if you like) ]. What power [watts] is expected of the supply? What amount of capacitive smoothing/filtering is on the high voltage? This LED - it is across the HV? Star

Re: [neonixie-l] smps protection question

I have a comment that is worthy of mention but may have nothing to do with your problem. The use of RCA connectors can be tricky. The earth/ground makes after the signal connection. That means there is a possibility of very large common-mode voltages. For instance, consider the usual mains CD

Re: [neonixie-l] Re: Need help with a tubehobby clock overheating

I didn't look closely when I mentioned about how to properly use heatsink compound. Was it hot before you added the heatsink? Was it hotter after? You pondered why the heatsink might make it hotter:- Someone mentioned maybe glue conducting. I mentioned the glue might insulate the heat.

Re: [neonixie-l] Re: Need help with a tubehobby clock overheating

Careful with epoxying a heatsink on. A heatconducting paste [dangerous chemical usually] OR a very thin layer of heatsink compound and a clip holding the heatsink is probably better. How much does the epoxy impede the heat flow? [and note I said very thin re the compound?Just enough to fill

Re: [neonixie-l] Re: OT: Do any long-life magic eye tubes exist ?

How about the very miniature display tubes in [old] vid cam eyepieces then? John K Australia - Original Message - From: gregebert To: neonixie-l@googlegroups.com Sent: Friday, March 13, 2015 5:12 AM Subject: Re: [neonixie-l] Re: OT: Do any long-life magic eye tubes exist ?

Re: [neonixie-l] Re: The answer is a lemon

I'd scan bits of the books and post, but there is probably more on the web anyway. The 30 vert lines pic was 'awful'. And yes, most had lenses. If anyone wants me to scan that pic, shout. John k Australia [PS Mum let my sister's girlfriend cut a piece of carboard from the rear cover for some

Re: [neonixie-l] The answer is a lemon

There is a lovely pair of volumes of Television Today [1930s, after acorn valves] , Newnes, (probably weekly and then bound). I absorbed Dad's copies when I was a kid and started a disk Tx and Rx at school. Still have the pieces - waiting for the 'round tuit' I need to complete it. John K

Re: [neonixie-l] Plasma Globe Substitute

GREEN for a voltage wire? What is the first tube's number? John K [PS nice toy.] - Original Message - From: 'threeneurons' via neonixie-l To: neonixie-l@googlegroups.com Sent: Friday, March 06, 2015 5:07 AM Subject: [neonixie-l] Plasma Globe Substitute Last week, I went

Re: [neonixie-l] Plasma Globe Substitute

I was querying the choice of colour for a wire that has voltage. In this part of the world Green is associated with earth/ground. [Although Green/Yellow has overtaken it.] John K Australia - Original Message - From: 'threeneurons' via neonixie-l neonixie-l@googlegroups.com To:

Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans..

OT still, but... there are web hits for Vampire with IFF and Radar. [Country vs year vs model etc though.] BTW, the Rebecca is part of an interrogator system; Rebecca finds the Eureka. The system can be employed as a DME. I am 'restoring' a Rebecca IV. The IV was the British test bed for the

Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans..

in flight during a visit to the UK in 1980.] John K - Original Message - From: Nick To: neonixie-l@googlegroups.com Sent: Thursday, February 26, 2015 1:17 AM Subject: Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans.. On Wednesday, 25 February 2015 14:25:33 UTC, johnk wrote

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