Re: [neonixie-l] Electrostatic CRT Tester

['Grahame' via neonixie-l]

Hi everyone, thanks for your all your interests. The tester is aimed at 
not just showing the a dot can be obtained but being able to 
characterise a tube and look for demonstration of performance at 
datasheet conditions or to allow measurements to be made on an otherwise 
poorly documented tube. I have been using a scope clock and a Heathkit 
IP17 PSU to experiment with CRTs and wanted something closer to a single 
box.


No software! No microcontroller to burn!

The electronics design will be fully open (Eagle schematics, board 
layout and Gerbers). Kits will run as anything from minimal (custom 
parts only) to completely built and tested. Sold by me from Scotland.


The case is a mixture of 3D printed parts, cut/engraved acrylic and all 
the parts to put it together and will be sold separately by Nick from 
San Diego. The cut acrylic mechanical drawing are not owned by us but by 
the company making the acrylic parts. The 3D printed parts will be 
available as STL and Fusion 360 files.




Expect full details by mid January 2017 or perhaps sooner. PM me if you 
need something immediately and I'll try to help.


Grahame



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Re: [neonixie-l] Electrostatic CRT Tester

[Nicholas Stock]

Marcin, what 12 inch tubes do you have?

Nick

Sent from my iPhone

> On Dec 6, 2016, at 19:19, Marcin Adamski  wrote:
> 
> I would be very interested, especially if I could use it on my 12 inch tubes.
>  Marcin
> 
>> On 07-Dec-16 08:38, 'Grahame' via neonixie-l wrote:
>> 
>> Here is a (not so very) sneak preview of a CRT Tester that Nick Stock
>> and I have been working on. It will test a wide range of CRTs from "low
>> voltage" types up to CRTs requiring 5kV (an add-on board takes that to
>> 12kV). It has adjustable outputs for complex tubes with geometry
>> electrodes and deflection blanking.
> 
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Re: [neonixie-l] Electrostatic CRT Tester

[Marcin Adamski]

I would be very interested, especially if I could use it on my 12 inch 
tubes.

  Marcin

On 07-Dec-16 08:38, 'Grahame' via neonixie-l wrote:


Here is a (not so very) sneak preview of a CRT Tester that Nick Stock
and I have been working on. It will test a wide range of CRTs from "low
voltage" types up to CRTs requiring 5kV (an add-on board takes that to
12kV). It has adjustable outputs for complex tubes with geometry
electrodes and deflection blanking.


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Re: [neonixie-l] Electrostatic CRT Tester

[Samuel G. Guss]

Greetings All,

Grahame, that is one amazing looking device! Definitely be interested in 
the kit!


All the best,
Sam


On 2016-12-06 16:38, the Renowned Grahame Marsh wrote:

Here is a (not so very) sneak preview of a CRT Tester that Nick Stock
and I have been working on. It will test a wide range of CRTs from
"low voltage" types up to CRTs requiring 5kV (an add-on board takes
that to 12kV). It has adjustable outputs for complex tubes with
geometry electrodes and deflection blanking.

 This is a prototype case - the final case will have laser engraved
labels on the jacks.

 Kits for the electronics and case available soon!

 Grahame

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Re: [neonixie-l] Electrostatic CRT Tester

[John Rehwinkel]

> Here is a (not so very) sneak preview of a CRT Tester that Nick Stock and I 
> have been working on. It will test a wide range of CRTs from "low voltage" 
> types up to CRTs requiring 5kV (an add-on board takes that to 12kV). It has 
> adjustable outputs for complex tubes with geometry electrodes and deflection 
> blanking.

Oh, that's a thing of beauty!  I too have a pile of CRTs from odd little 
viewfinder units to projection TV jugs.  I've been working on lower voltage 
power supplies (500V-2kV) based on CCFL supplies and multipliers and higher 
voltage ones based on flyback transformers.  A canned device like this would be 
a big aid in evaluating unknown CRTs and supplying missing voltages until I can 
get more dedicated supplies built.

It will help with the voltages for magnetic deflection and focus CRTs too, but 
obviously I'll need additional circuitry for them.

> Kits for the electronics and case available soon!

I'm looking forward to it!  I looked at the tubetime boards (that's where I got 
the CCFL idea), but they don't quite meet my needs.  I've been using David 
Forbes' Scope Clock as a CRT tester for a while, but it's aimed at common 
mid-sized CRTs, and I have a bunch of outliers.

- John

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Re: [neonixie-l] Electrostatic CRT Tester

[David Forbes]

Grahame,

That looks like a nice gadget. I could use one to test all those CRTs piled up 
in my store room. Especially the 7YP2.



On 12/6/2016 2:38 PM, 'Grahame' via neonixie-l wrote:


Here is a (not so very) sneak preview of a CRT Tester that Nick Stock and I have
been working on. It will test a wide range of CRTs from "low voltage" types up
to CRTs requiring 5kV (an add-on board takes that to 12kV). It has adjustable
outputs for complex tubes with geometry electrodes and deflection blanking.




--
David Forbes, Tucson, AZ

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[neonixie-l] Jeff Thomas GPSII clock with updated GPS module featured on TubeclockDB.com

[Ian Sparkes]

Hi All,

I just posted an article here 
http://www.tubeclockdb.com/user-submitted/354-jeff-thomas-gpsii.html about 
an original 2003 Jeff Thomas GPSII clock, which is up for sale. This had 
the GPS module which stopped working in Feb 2016 because of a firmware 
limitation, but the owner (probably lurking here somewhere) made a new one 
to the same quality standards. The firmware has also been updated in 2010.

It's a beautiful clock.

Non-disclaimer: It's not my clock, but I wanted to feature it on the site 
because of the history associated with it. It will only ship to the US, so 
that does it for me, because I'm not in the US. :-/

On another note, if anyone else has an interest in the updated GPS module 
in the same idiom and quality as the original one, the owner might also be 
able to make a few more.

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Re: [neonixie-l] Re: Oscilloscope Music

[Nicholas Stock]

The scope stuff is cool, the music not so much, but each to their own. His
Kickstarter was apparently successful.

On Tue, Dec 6, 2016 at 6:05 AM, Instrument Resources of America <
iracosa...@hughes.net> wrote:

> Only five seconds here.  Ira.
>
> On 12/5/2016 5:24 PM, 'Terry S' via neonixie-l wrote:
>
> I was sick of it after about a minute and physically sick by minute
> two.
>
> On Monday, December 5, 2016 at 4:24:38 PM UTC-6, Frank Bemelman wrote:
>>
>> Interesting...
>>
>> https://www.youtube.com/watch?v=XziuEdpVUe0
>>
>> Cheers,
>> Frank
>>
>>
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Re: [neonixie-l] Re: Oscilloscope Music

[Instrument Resources of America]

Only five seconds here.  Ira.


On 12/5/2016 5:24 PM, 'Terry S' via neonixie-l wrote:
I was sick of it after about a minute and physically sick by 
minute two.


On Monday, December 5, 2016 at 4:24:38 PM UTC-6, Frank Bemelman wrote:

Interesting...

https://www.youtube.com/watch?v=XziuEdpVUe0


Cheers,
Frank


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<>

[neonixie-l] Re: Oscilloscope Music

[Jon]

Well, I never liked their music myself much either, but don't you feel that 
burning them is a little, well, mediaeval ? :)

Jon. 

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