I recall an article I read years ago about the old RADAR tubes and phosphors used. There was a RADAR scope tube that had a mix of two phosphors. One phosphor produced a short persistence bright blue light from the target and the other was the longer persistence P12 type orange phosphor that was excited by the blue phosphor hung around after the blue faded and was refreshed by another "ping" of blue light from the target. An orange filter was placed in front of the tube face to filter out the blue flash which would have been very distracting to the operator.
On Tuesday, February 11, 2020 at 7:28:40 PM UTC-5, charles 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. > > -- > Charles MacDonald VA3CPY Stittsville Ontario > [email protected] <javascript:> Just Beyond the Fringe > No Microsoft Products were used in sending this e-mail. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/3a6cfcb8-da93-4970-99e9-15e7d915008a%40googlegroups.com.
