I had mentioned a while back that fair radio in Lima, OH. had some crt's. I did make a list of regular picture tubes. The rest were military surplus. I have found out that pretty much those were scope or radar tubes.There are some (10kp7a) as an ex. that test fine on my tester if I set it up for a 10bp4a. I am curious, would this be ok for a tv, or is the coating on the screen wrong? From the front it is very white. But, I will admit I do not know pretty much anything about crt's. I have been into old radios for years but started on tv's fairly recently. Also, can someone help me identify a 16 inch round crt that has metal on the sides and is glass on the front and neck? Thanks!

there are two phosphors, a quick one that's bluish and a long one that's yellow which takes a long time to extinguish once excited. They make poor TV CRTs.

The P7 suffix indicates a radar screen with a blue-white fluorescence, instead
of white for a standard P4 television tube. Other people more familiar with
radar CRTs will tell you more about the use of such a tube in a TV. See this
link for an extensive table of CRT phosphors:

http://amfone.net/Amforum/index.php?action=dlattach;topic=18928.0;attach=108 86

David is correct in that they don't work all that well for TV viewing, they produce a somewhat odd looking image. However, I use a 7JP7 as a test CRT for electrostatic sets and it works well for that purpose. Using that tube as a test results in less handling of the good P4 tube.

Steve