Re: [neonixie-l] P12 Phosphor CRT

Tue, 11 Feb 2020 19:55:06 -0800

That's exactly what I've stated in several previous emails, but I'm not sure that they went through. YES!! P12 is an orange, medium-long, to long, persistence phosphor, primarily intended for radar use, such as Plan Position Indicators, PPI's. To this day don't know how the radar men, on the ship that I was on, sat there in front of those PPI's for up to eight hours at a time, without having their eyes bug out, or go batty.    Ira. 

On 2/11/2020 4:28 PM, Charles MacDonald wrote:

On 2020-02-10 11:05 a.m., Nicholas Stock wrote:

Other tubes with P12 phosphor are 3JP12’s as far as I can tell. Some 
of the datasheets for others say they were available as P12, but I 
rarely find them for sale anywhere....


the description from JEDEC says P12 was intended for radar. see attched)


some REGISTERED at P12 include 5CP12,5AJP12,7LP12,16AFP12, 7AGP12, 
3ACP12A, 19Wp12, 3BMP12, 17QCP12, 12AWP12, 5EKP12, 19DXP12.


the larger sizes are consistent with Radar use.


Sylvania or Dumont in Particular advertised that they would build ANY 
CRT with any available phosphor given a suitable sized order, so 
presumably any scope tube could have existed as a P12 - (or P7) version.




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