[neonixie-l] Re: B7971's on the bay....

[Richard Scales]

I actually put the question of an "Rb|7971" directly to Dalibor probably 
about a year or mote ago and whilst he agreed that the idea was 
interesting, it was not high up on his list of potential future projects 
due most likely to the relatively small demand for such a thing. I am sure 
that there are many on this group that would like to disagree - including 
me!
I set about collecting B-7971's instead which I have managed to do and 
fortunately I was able to do so at an acceptable (to me) price point 
(though still ridiculous).
There may indeed be the odd 'bargain' still to be had and I still get a 
little excited when I see them come up for sale but I have (mostly) tamed 
my hoarding instinct now thank goodness.

On Monday, 30 March 2020 12:13:08 UTC+1, Robert G. Schaffrath wrote:
>
> I saw them when they first appeared. I didn't need them and thought the 
> price was actually pretty good compared to prices in the USD$175 range only 
> a few weeks ago. There are various multi-tube devices for sale now and they 
> are priced around USD$120 or so per tube.
>
> It is hard to believe those prices. I have noticed other eBay prices have 
> gone up too. IN-12's are suddenly rather "expensive" compared to last fall. 
> Of course, if this stimulus bill does not work too well and a lot of people 
> are looking for cash, there may be a lot of fire sales on stuff like this.
>
> On Sunday, March 29, 2020 at 11:16:54 AM UTC-4, gregebert wrote:
>>
>> There were two b7971's available last night on Ebay at 150USD each, used 
>> and  *untested*. They are already gone.
>> This is crazy.
>>
>

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[neonixie-l] Re: Elektronika-7 Clock... What kind of IV-26 tubes? Just found out there's Type 1, Type 2, and Type 3 IV-26's.

[Terry Kennedy]

On Sunday, March 29, 2020 at 8:49:05 AM UTC-4, celzey11 wrote:
>
> Hello all, just ended up winning an IV-26 clock, the kind with 12 tubes 
> for each digit. The one I got has very worn out tubes, and some segments 
> barely light, so I want to replace some or all of the tubes. But what type 
> of IV-26 tubes should I get? It seems like the difference is how the 
> segments in the tube are wired together. 
>

"It depends". Type 3 is for vertical-tube clocks (like the mini 
Elektronika) with the segments connected internally for that usage. Type 2 
is used in some horizontal tube clocks, but not all. In particular, I've 
seen some of those clocks that have 9-pin tubes (with all 9 pins soldered) 
as if they were Type 1, but were actually wired as type 2 internally. 
Apparently efficiency was not particularly important under the Soviet 
system, as this required soldering 432 tube leads in total instead of 240.

You need to look at the tubes and boards in your particular clock to see 
what it has and can accept. Since you have a 12-tube clock, you have one of 
the older units. The date code should be on the sticker on the outside back 
of the case, unless it was scraped off (apparently some had at least the 
serial number scratched out as the clocks "migrated" from their original 
locations).

Changing the tubes on these is a bit of a PITA. First, the PCB material is 
old-style phenolic, not the FR94, etc. that you're likely used to. That 
means it is easy to lift the traces off the board when de-soldering the 
tubes. The boards were usually varnished AFTER the tubes were soldered, so 
be prepared for some noxious fumes as well. Plus, as I said above, it is 
432 pins to solder. The foam holding everything in place will have degrated 
to a pink goo. All of this is covered in my blog entries on the clock, 
starting here: https://www.glaver.org/blog/?p=419 I think you already found 
that, as you emailed me.

To answer your email, you could theoretically convert one of these to run 
on 120V. There are 2 coils on the input side of the power transformer, 
connected in series for 240V operation (so, 120V each). You'd remove the 
jumper between the coils and connect them in parallel for 120V. Be careful 
to maintain the same orientation (one of the 120V leads connected to the A 
side of each winding, the other 120V lead to the B side of each winding). 
In all of the clocks I've seen, the transformer was subjected to the same 
liberal dunking in varnish that the display boards got, and cutting through 
all of that to convert the clock would have ruined its originality, IMHO. I 
used an inexpensive 120 to 240 step-up transformer from Amazon as I 
describe here: https://www.glaver.org/blog/?p=310

If you do decide to go ahead with re-tubing the clock and you're in the US, 
you could send me an email as I am sitting on a large pile of Type 1 tubes 
for a project that never got off the ground. This would likely be cheaper / 
faster than ordering from overseas.

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Re: [neonixie-l] Dalibor Farný built a Nixie display for NASA

[Joe Croft]

That's good! I missed that. Would've nice to see it lit up! That or Dalibor 
needs to fine tune his timing ;)

-joe

-joe
On Monday, March 30, 2020 4:29:48 PM CDT Jon Jackson wrote:
> It was posted on the Nixie Facebook feed...
> 
> On Mon, Mar 30, 2020 at 3:14 PM Joe Croft  wrote:
> 
> > Jon,
> >
> >
> >
> > Hm. It looks real nice, but with the "Uncertainty" meter, I can't
> > help but think of the Hitchhikers guide to the Galaxy which them makes me
> > think the video was release 2 days earlier. I hope that you didn't spoil
> > the fun for Dalibor.
> >
> >
> >
> > -joe
> >
> >
> >
> > On Monday, March 30, 2020 2:03:07 PM CDT Jon D. wrote:
> >
> > > Stumbled onto this a minute ago: More great work by Dalibor !!
> >
> > > https://www.facebook.com/daliborfarnycom/videos/583059495662423/
> >
> > >
> >
> > > "Destination: Kennedy Space Center. Leaving today. One of the most
> >
> > > unbelievable projects I made so far :-) high-speed nixie tube display
> > for
> >
> > > NASA. To not scare myself, I didn’t ask the exact purpose it will be
> > used
> >
> > > for. I think it´s time to do it now "
> >
> > >
> >
> > > Jon D.
> >
> > >
> >
> > >
> >
> >
> >
> >
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "neonixie-l" group.
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> > To view this discussion on the web, visit
> > https://groups.google.com/d/msgid/neonixie-l/6152475.ev70RZ96I0%40phil
> > 
> > .
> >
> 
> 


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Re: [neonixie-l] Dalibor Farný built a Nixie display for NASA

[Jon Jackson]

It was posted on the Nixie Facebook feed...

On Mon, Mar 30, 2020 at 3:14 PM Joe Croft  wrote:

> Jon,
>
>
>
> Hm. It looks real nice, but with the "Uncertainty" meter, I can't
> help but think of the Hitchhikers guide to the Galaxy which them makes me
> think the video was release 2 days earlier. I hope that you didn't spoil
> the fun for Dalibor.
>
>
>
> -joe
>
>
>
> On Monday, March 30, 2020 2:03:07 PM CDT Jon D. wrote:
>
> > Stumbled onto this a minute ago: More great work by Dalibor !!
>
> > https://www.facebook.com/daliborfarnycom/videos/583059495662423/
>
> >
>
> > "Destination: Kennedy Space Center. Leaving today. One of the most
>
> > unbelievable projects I made so far :-) high-speed nixie tube display
> for
>
> > NASA. To not scare myself, I didn’t ask the exact purpose it will be
> used
>
> > for. I think it´s time to do it now "
>
> >
>
> > Jon D.
>
> >
>
> >
>
>
>
>
>
> --
> You received this message because you are subscribed to the Google Groups
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> 
> .
>

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Re: [neonixie-l] Dalibor Farný built a Nixie display for NASA

[Joe Croft]

Jon, 

Hm. It looks real nice, but with the "Uncertainty" meter, I can't help 
but think of the Hitchhikers guide to the Galaxy which them makes me think the 
video was release 2 days earlier. I hope that you didn't spoil the fun for 
Dalibor.

-joe

On Monday, March 30, 2020 2:03:07 PM CDT Jon D. wrote:
> Stumbled onto this a minute ago: More great work by Dalibor !!
> https://www.facebook.com/daliborfarnycom/videos/583059495662423/
> 
> "Destination: Kennedy Space Center. Leaving today. One of the most 
> unbelievable projects I made so far :-) high-speed nixie tube display for 
> NASA. To not scare myself, I didn’t ask the exact purpose it will be used 
> for. I think it´s time to do it now  "
> 
> Jon D.
> 
> 


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[neonixie-l] Re: B7971's on the bay....

[Robert G. Schaffrath]

I saw them when they first appeared. I didn't need them and thought the 
price was actually pretty good compared to prices in the USD$175 range only 
a few weeks ago. There are various multi-tube devices for sale now and they 
are priced around USD$120 or so per tube.

It is hard to believe those prices. I have noticed other eBay prices have 
gone up too. IN-12's are suddenly rather "expensive" compared to last fall. 
Of course, if this stimulus bill does not work too well and a lot of people 
are looking for cash, there may be a lot of fire sales on stuff like this.

On Sunday, March 29, 2020 at 11:16:54 AM UTC-4, gregebert wrote:
>
> There were two b7971's available last night on Ebay at 150USD each, used 
> and  *untested*. They are already gone.
> This is crazy.
>

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Re: [neonixie-l] Re: NL7037 clock

['Ian Vine' via neonixie-l]

Nice

IanV

> On 29 Mar 2020, at 18:50, Paul Andrews  wrote:
> 
> 
> It took me a bit longer than a few weeks. I ended up going into a lot of 
> detail in my blog, but here is a summary: 
> https://www.nixies.us/clocks/nl7037-nixie-clock/
> 
> 
>> On Wednesday, October 2, 2019 at 1:27:47 PM UTC-4, Paul Andrews wrote:
>> Finally completed this NL7037 clock/space heater. Vacuum-tube power supply, 
>> ESP32 processor for networking, clock, sounds etc.
>> 
>> I'll do a write-up on the odyssey that got me here in a few weeks. It has 
>> been fun.
>> 
>> 
>> 
>> 
>> 
>> Meters for the HV and nixie tube current - That's DC voltage, not AC
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Back view, with the teeny tiny WiFi antenna. The knob controls the HV level.
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
> 
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