[neonixie-l] Re: Interesting paper on CRT & VFD phosphor types...

[Clare Freeman]

Hi Nick

I found the same document from 

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&ved=0CG8QFjAK&url=http%3A%2F%2Famfone.net%2FAmforum%2Findex.php%3Faction%3Ddlattach%3Btopic%3D18928.0%3Battach%3D10886&ei=twg1U_eBF8GMkAXtuoHQCA&usg=AFQjCNEOcyrIZyBCiLx6-vzULwnw7QDDnQ&sig2=-FyzDrrgtyDhE31VoD8-FQ&bvm=bv.63808443,d.dGI&cad=rjt.
 

Despite the long URL AVG said it was a clean site so I took the risk and 
downloaded it. No trouble so far and that was about 3 months ago.

This is also interesting http://www.phosphor-technology.com/products/crt.htm

Cheers
Clare

On Saturday, February 22, 2014 1:15:24 AM UTC+8, Nick wrote:
>
> Found this in my archives, by Patrick Jankowiak - lot of good information 
> relevant to those building CRT clocks & doing stuff with VFDs etc.
>
> I have a suspicion that I originally got it from 
> http://www.bunkerofdoom.com/ - a great site...
>
> Nick 
>
>
>

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Re: [neonixie-l] Inkjet printable conductive ink

[Adam Jacobs]

Kind of reminds me of back when I was a kid, my dad worked for a startup 
called 'Ariel Electronics'. They had a 2-dimensional circuit plotter 
that was pretty neat back around 1990 or so.


-Adam

On 3/27/2014 2:06 PM, Michel wrote:

Hello guys,

I just came across this kickstarter project and I don't think it has 
been posted here before.


It's a project to make a conductive ink that can be used in ordinary 
inkjet printers. No more breadboards! I am myself someone who really 
dislikes making breadboards, I have only made 1 or 2 in my life, so 
this would really assist in a cheaper (and quicker) way to prototype 
some designs. It won't do any through hole plating, so it's not that 
useful for complex circuits, but never the less, I like this idea!


A conductive toner for laser printers would be even better, and I 
guess, it will also come one day in the near future.


https://www.kickstarter.com/projects/1597902824/agic-print-printing-circuit-boards-with-home-print

Cheers,
Michel


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[neonixie-l] Inkjet printable conductive ink

[Michel]

Hello guys,

I just came across this kickstarter project and I don't think it has been 
posted here before.

It's a project to make a conductive ink that can be used in ordinary inkjet 
printers. No more breadboards! I am myself someone who really dislikes 
making breadboards, I have only made 1 or 2 in my life, so this would 
really assist in a cheaper (and quicker) way to prototype some designs. It 
won't do any through hole plating, so it's not that useful for complex 
circuits, but never the less, I like this idea!

A conductive toner for laser printers would be even better, and I guess, it 
will also come one day in the near future.

https://www.kickstarter.com/projects/1597902824/agic-print-printing-circuit-boards-with-home-print

Cheers,
Michel


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Re: [neonixie-l] Re: trigger tube equivilents

[JohnK]

Maybe a capacitor across the wiper contact will solve it. The capacitor would 
normally be shorted by the wiper making correct contact. A momentary opening 
would be swamped by the uncharged capacitor. The capacitor may need a small 
series resistance to reduce the current from the capacitor when the wiper 
shorts it again. [ I hope - I can't picture the wiper etc that you mention. 
Want to hear from others too.]
John K.
  - Original Message - 
  From: bob harper 
  To: neonixie-l@googlegroups.com 
  Sent: Friday, March 28, 2014 2:01 AM
  Subject: Re: [neonixie-l] Re: trigger tube equivilents


  Hi right I have broken the circuit to the solenoid from the cathode of the 
gr44 all other wiring reconnected as schematic it does indeed fire the gr44 and 
the solenoid if momentary disconnected so that does seem to be the source of 
the fault. Bob

  On 27 Mar 2014 09:33, "JohnK"  wrote:

Depends on how and where you disconnected the trigger - may need to load 
down that pin.
Can you confirm that lifting the wiper DOES trigger the tube?   You could 
set up the right conditions on the other pins [including trigger] and then 
interrupt that circuit manually.
If it is a 'glitch' from the wiper, a capacitor/resistor network should 
improve things. 
Let's see what is forthcoming from all the others here.
John K
Australia
  - Original Message - 
  From: bob harper 
  To: neonixie-l@googlegroups.com 
  Sent: Thursday, March 27, 2014 6:34 PM
  Subject: [neonixie-l] Re: trigger tube equivilents


  hi all...well i have finally got this thing working...all trigger tubes, 
in the selection system the countdown tubes in the credit unit and the 3 
digital display nixie tubes...but ONE remaining problem. the 1st tube on the 
left in the schematic a GR44 [i have tried another as well] fires when it 
should, but also when it should not, i disconnected the trigger and it still 
fires...the problem [i think] is that the K cathode is connected via a wiper 
contact on a rotating arm to the reset solenoid, which although cleaned and 
adjusted and tested with the meter, must be occasionally losing its contact 
[bear in mind the etched track is 50 years old] for a split 
second...clip.

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Re: [neonixie-l] Re: trigger tube equivilents

[bob harper]

Hi right I have broken the circuit to the solenoid from the cathode of the
gr44 all other wiring reconnected as schematic it does indeed fire the gr44
and the solenoid if momentary disconnected so that does seem to be the
source of the fault. Bob
On 27 Mar 2014 09:33, "JohnK"  wrote:

>  Depends on how and where you disconnected the trigger - may need to load
> down that pin.
> Can you confirm that lifting the wiper DOES trigger the tube?   You could
> set up the right conditions on the other pins [including trigger] and then
> interrupt that circuit manually.
> If it is a 'glitch' from the wiper, a capacitor/resistor network should
> improve things.
> Let's see what is forthcoming from all the others here.
> John K
> Australia
>
> - Original Message -
> *From:* bob harper 
> *To:* neonixie-l@googlegroups.com
> *Sent:* Thursday, March 27, 2014 6:34 PM
> *Subject:* [neonixie-l] Re: trigger tube equivilents
>
> hi all...well i have finally got this thing working...all trigger tubes,
> in the selection system the countdown tubes in the credit unit and the 3
> digital display nixie tubes...but ONE remaining problem. the 1st tube on
> the left in the schematic a GR44 [i have tried another as well] fires when
> it should, but also when it should not, i disconnected the trigger and it
> still fires...the problem [i think] is that the K cathode is connected via
> a wiper contact on a rotating arm to the reset solenoid, which although
> cleaned and adjusted and tested with the meter, must be occasionally losing
> its contact [bear in mind the etched track is 50 years old] for a split
> second...clip.
>
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Re: [neonixie-l] Re: trigger tube equivilents

[JohnK]

Depends on how and where you disconnected the trigger - may need to load down 
that pin.
Can you confirm that lifting the wiper DOES trigger the tube?   You could set 
up the right conditions on the other pins [including trigger] and then 
interrupt that circuit manually.
If it is a 'glitch' from the wiper, a capacitor/resistor network should improve 
things. 
Let's see what is forthcoming from all the others here.
John K
Australia
  - Original Message - 
  From: bob harper 
  To: neonixie-l@googlegroups.com 
  Sent: Thursday, March 27, 2014 6:34 PM
  Subject: [neonixie-l] Re: trigger tube equivilents


  hi all...well i have finally got this thing working...all trigger tubes, in 
the selection system the countdown tubes in the credit unit and the 3 digital 
display nixie tubes...but ONE remaining problem. the 1st tube on the left in 
the schematic a GR44 [i have tried another as well] fires when it should, but 
also when it should not, i disconnected the trigger and it still fires...the 
problem [i think] is that the K cathode is connected via a wiper contact on a 
rotating arm to the reset solenoid, which although cleaned and adjusted and 
tested with the meter, must be occasionally losing its contact [bear in mind 
the etched track is 50 years old] for a split second...clip.

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[neonixie-l] Re: trigger tube equivilents

[bob harper]

hi all...well i have finally got this thing working...all trigger tubes, in 
the selection system the countdown tubes in the credit unit and the 3 
digital display nixie tubes...but ONE remaining problem. the 1st tube on 
the left in the schematic a GR44 [i have tried another as well] fires when 
it should, but also when it should not, i disconnected the trigger and it 
still fires...the problem [i think] is that the K cathode is connected via 
a wiper contact on a rotating arm to the reset solenoid, which although 
cleaned and adjusted and tested with the meter, must be occasionally losing 
its contact [bear in mind the etched track is 50 years old] for a split 
second...which i am assuming [here my knowledge gets hazy] that would allow 
the anode voltage to rise and trigger the tube? if this is the case, is 
there a solution to this? if not, my thought was to put in a relay which 
when the motor driving the rotating arm is running it opens the circuit 
from the cathode to the reset coil...any thoughts anyone? thanks, bob

On Sunday, June 16, 2013 12:24:24 PM UTC+1, bob harper wrote:
>
> doing research on this jukebox pcba couple of questions please..the 
> GR43's the equivalent has been suggested as Z700U by jan wuesten [german 
> supplier i get obsolete stuff from] but looking at the specs for both 
> on[franks electron tube page] there appears to me to differences in the 
> specsi am not experienced enough in these devises to know if they will 
> work!
> next the ER32 and EA33the ER33 has actually a GR44 installed in its 
> place [looks original] this a twin start 5 wire device, the specs on franks 
> page...but the ER32 which has been desoldered and removed, i cannot find 
> any info on...its another 5 wire device.
> the other tubes i have found o.k and can get replacements, any 
> advice/suggestions on the above gratefully received! thanks, bob
>

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