Re: [neonixie-l] CRT colors

[David Forbes]

There are a variety of phosphors used in oscilloscope tubes. Here's a
rundown:

P1 is the original green. It's long lasting.
P4 is white, faster. It's not common in smaller tubes, as it was used
primarily for TV sets.
P7 is a radar phosphor with a fast blue glow and a yellow afterglow.
P11 is fast and blue.
P12 is orange.

I'm in the process of getting my scope clock back into production, with a
laser cut case. I'm using a Teensy to make the circuitry simple, yet
capable of lovely curved fonts as my original scope clock from 20 years
ago, that set the bar.



On Fri, May 29, 2020, 8:35 PM 'John Rehwinkel' via neonixie-l <
neonixie-l@googlegroups.com> wrote:

>
> Standard colo(u)rs I have seen are Green (P1, P31), white (P4), blue (P7,
> P11) and orange (P12, P19)
>
> https://en.m.wikipedia.org/wiki/Phosphor
>
> There are some exotics (like red) that allegedly exist, but I’ve never
> found a CRT with a red phosphor (yet...:).
>
>
> There are some purple ones out there like P16 flying spot scanner tubes.
> I've seen red ones in flood beam and projection TV tubes.
>
> - John
>
>
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> .
>

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Re: [neonixie-l] CRT colors

['John Rehwinkel' via neonixie-l]

> Standard colo(u)rs I have seen are Green (P1, P31), white (P4), blue (P7, 
> P11) and orange (P12, P19)
> 
> https://en.m.wikipedia.org/wiki/Phosphor 
> 
> 
> There are some exotics (like red) that allegedly exist, but I’ve never found 
> a CRT with a red phosphor (yet...:).

There are some purple ones out there like P16 flying spot scanner tubes.  I've 
seen red ones in flood beam and projection TV tubes.

- John


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Re: [neonixie-l] CRT colors

[Nicholas Stock]

Standard colo(u)rs I have seen are Green (P1, P31), white (P4), blue (P7, P11) 
and orange (P12, P19)

https://en.m.wikipedia.org/wiki/Phosphor

There are some exotics (like red) that allegedly exist, but I’ve never found a 
CRT with a red phosphor (yet...:). 

For a good vector graphics based CRT clock check out Grahame’s Scope Clock Due 
(www.sgitheach.org.uk/scope3.html)

Nick

Sent from my iPhone

> On May 29, 2020, at 18:09, Mac Doktor  wrote:
> 
> 
>> On May 29, 2020, at 8:17 PM, John Snow  wrote:
>> 
>> I'd like to put something together to display Lissajous curves - i'd much 
>> rather use monochromatic displays than color CRTs where I use only one 
>> channel.
> 
> Check this out:
> 
> https://www.astarcloseup.com/2016/02/the-oscilloscope-artist.html
> 
> 
> I'd like to have a scope clock but I'm only interested in the vectored type, 
> not rastered.
> 
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
> https://www.astarcloseup.com/
> 
> "Every kid starts out as a natural-born scientist, and then we beat it out of 
> them. A few trickle through the system with their wonder and enthusiasm for 
> science intact."—Carl Sagan, Psychology Today, 1996
> 
> -- 
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Re: [neonixie-l] CRT colors

[Mac Doktor]

> On May 29, 2020, at 8:17 PM, John Snow  wrote:
> 
> I'd like to put something together to display Lissajous curves - i'd much 
> rather use monochromatic displays than color CRTs where I use only one 
> channel.

Check this out:

https://www.astarcloseup.com/2016/02/the-oscilloscope-artist.html 



I'd like to have a scope clock but I'm only interested in the vectored type, 
not rastered.


Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com/

"Every kid starts out as a natural-born scientist, and then we beat it out of 
them. A few trickle through the system with their wonder and enthusiasm for 
science intact."—Carl Sagan, Psychology Today, 1996

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Re: [neonixie-l] CRT colors

[Charles MacDonald]

On 2020-05-29 8:17 p.m., John Snow wrote:

Is there a model line of CRT tube that's available in different colors?

Alternatively; know of any analogue oscilloscopes that came in different 
colors?


many of the makers did offer other phosphors in 'scope Tubes.  BUT 
normaly the effort was to control the persistence of the glow.  Take the 
P7 used fro Radar displays for example.  a very short blue-ultraviolet 
display, followed by a 2 second or more yellow glow.  there was an 
Orange long phosphor also in some lines.


Sylvania even made some tubes with a two colour phosphor - which one 
glowed depended on a drive signal.


this link has scans of some of the standard versions from different firms.
http://w140.com/tekwiki/wiki/Phosphor


--
Charles MacDonald  VA3CPY   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] CRT colors

[John Snow]

Is there a model line of CRT tube that's available in different colors?

Alternatively; know of any analogue oscilloscopes that came in different 
colors?

I'd like to put something together to display Lissajous curves - i'd much 
rather use monochromatic displays than color CRTs where I use only one 
channel.

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Re: [neonixie-l] 1961 Heathkit Catalog

[Mac Doktor]

> On May 29, 2020, at 10:43 AM, Nicholas Stock  wrote:
> 
> Derek Lowe is bit of a ‘celebrity’ in medicinal chemistry circles...super 
> smart and a good writer...


I've been trying to re-find his articles for years. I couldn't remember the 
domain name or his tag line. Thanks to Paul for the link.


Terry Bowman, KA4HJH
"The Mac Doctor”

"Never install version point-zero of anything"

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Re: [neonixie-l] 1961 Heathkit Catalog

[Nicholas Stock]

Derek Lowe is bit of a ‘celebrity’ in medicinal chemistry circles...super smart 
and a good writer...

Sent from my iPhone

> On May 29, 2020, at 07:08, gregebert  wrote:
> 
> 
> Oh, that darn Sulfur is a mischievous element.sulfides, mercaptans, 
> thio-this, and thio-that.
> 
> My favorite is aluminum sulfide: It slowly decomposes in air to produce H2S, 
> the well-known rotten-egg stink.
> It looks like dirt. I put a few crumbs in a co-workers toolbox as a prank.
> 
> Every morning, he opened it up to a ghastly stink bomb, but throughout the 
> day it dissipated. Next morning it's stinky again. Now thinking he movie 
> "Groundhog Day".
> Finally after a week I confessed.
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Re: [neonixie-l] 1961 Heathkit Catalog

[gregebert]

Oh, that darn Sulfur is a mischievous element.sulfides, mercaptans, 
thio-this, and thio-that.

My favorite is aluminum sulfide: It slowly decomposes in air to produce 
H2S, the well-known rotten-egg stink.
It looks like dirt. I put a few crumbs in a co-workers toolbox as a prank.

Every morning, he opened it up to a ghastly stink bomb, but throughout the 
day it dissipated. Next morning it's stinky again. Now thinking he movie 
"Groundhog Day".
Finally after a week I confessed.

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Re: [neonixie-l] 1961 Heathkit Catalog

[Paul Andrews]

This guy is always a good read: 
https://blogs.sciencemag.org/pipeline/archives/2009/06/11/things_i_wont_work_with_thioacetone

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