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

['jf...@my-deja.com' via neonixie-l]

I will believe it when I see it.

On Tuesday, August 30, 2016 at 5:20:08 PM UTC-7, A.J. Franzman wrote:
>
> If you sputter enough metal onto any insulator, you can make it conduct.
>
> On Tuesday, August 30, 2016 at 1:28:06 PM UTC-7, j@my-deja.com wrote:
>>
>>  I think this is improbable.  On the one tube that I dissected*, the back 
>> substrate is an insulating white ceramic with an insulating  black ceramic 
>> overcoat.
>>
>

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

[A.J. Franzman]

If you sputter enough metal onto any insulator, you can make it conduct.

On Tuesday, August 30, 2016 at 1:28:06 PM UTC-7, j@my-deja.com wrote:
>
>  I think this is improbable.  On the one tube that I dissected*, the back 
> substrate is an insulating white ceramic with an insulating  black ceramic 
> overcoat.
>

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

['jf...@my-deja.com' via neonixie-l]

I would believe it was NOS if it was accompanied by a pristine box, the 
lettering on the tube was all sharp and crisp, and the pins were all 
straight (with no tool marks from straightening) and unscratched (or maybe 
one scratch from burn-in).


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

[Jeff Walton]

The only NOS tubes that might have been around would be branded as Burroughs 
and not Ultronics.  I actually had a couple Burroughs tubes NIB that I 
purchased back in 1970 or 1971 before I found the Ultronics tubes in the back 
of magazines for sale by the surplus houses.  I have kicked myself for not 
keeping the new Burroughs tubes and the boxes as a pristine reference for 45 
years later, but who would have thought that we would be talking about this so 
long after the fact.  Even in 1971, the Ultronics tubes were all pulls from 
systems that had been in operation and bought up by liquidators. 

 

The shadow on the substrate may even exist on a NOS tube depending on the 
burn-in process that was used and the doping mix of materials in the gas that 
were used for stabilizing and sealing preceded the burn-in.

 

 

From: 'jf...@my-deja.com' via neonixie-l [mailto:neonixie-l@googlegroups.com] 
Sent: Tuesday, August 30, 2016 3:28 PM
To: neonixie-l
Subject: Re: [neonixie-l] Re: b7971 segment current

 

On Monday, August 29, 2016 at 9:31:39 PM UTC-7, A.J. Franzman wrote:

... They might be shorted to the back substrate and possibly even each other 
via the substrate...

 I think this is improbable.  On the one tube that I dissected*, the back 
substrate is an insulating white ceramic with an insulating  black ceramic 
overcoat.

BTW, this is one of the reasons I think there are no NOS tubes.  It would be a 
lot of unnecessary additional work to deliberately put the shadow pattern into 
the black ceramic overcoat.

* My one catastrophic failure because the glass envelope could not withstand 
being struck by the floor.

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

['jf...@my-deja.com' via neonixie-l]

On Monday, August 29, 2016 at 9:31:39 PM UTC-7, A.J. Franzman wrote:
>
> ... They might be shorted to the back substrate and possibly even each 
> other via the substrate...
>
 I think this is improbable.  On the one tube that I dissected*, the back 
substrate is an insulating white ceramic with an insulating  black ceramic 
overcoat.

BTW, this is one of the reasons I think there are no NOS tubes.  It would 
be a lot of unnecessary additional work to deliberately put the shadow 
pattern into the black ceramic overcoat.

* My one catastrophic failure because the glass envelope could not 
withstand being struck by the floor.

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Re: [neonixie-l] Digest for neoni...@googlegroups.com - 19 updates in 6 topics

['threeneurons' via neonixie-l]

Couldn't find any response either. He called me from Hawaii, a couple of 
days ago, so he's doing all his internet browsing from his iPhone. Could 
have hit the wrong button, by mistake. Sometimes, I lose my grip on my 
smartphone, and in the process accidentally start up all kinds of apps.

Good thing the cold war was over before smart phones. Transfer the nuke 
launch codes from the old "football", to the President's iPhone, and he 
starts WWIII when he answers his next phone call.

On Monday, August 29, 2016 at 9:39:52 PM UTC-7, A.J. Franzman wrote:
>
> Does anyone see where Westdave wrote anything new here? Considering 
> deleting the post and topic.
>
> On Sunday, August 28, 2016 at 12:28:03 PM UTC-7, westdave wrote:
> [huge digest quote]
>

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