[ohohyodafarted]

RE: 15GP22 issues.

I am working with John folsom on the 15Gp22 rebuild project.

1. There should be no issues with the viability of the phosphors regardless of whether or not the crt is under vacuum. So long as the tube has been sealed, (IE; the neck is not broken off) the phosphors should be usable.

2. Someone stated that electron guns exposed to air instantly get destroyed. That is true only for electron guns that have been activated with the RF bomber. Guns that have not had the cathodes activated are not subject to the instant destruction from air.

3. John and I have done a very through analysis of the leak issue on the
15GP22. It is our belief that the leakers have gone to air not from the glass to metal seal, but from 2 metal to metal joints that exist in the manufacture of the ultor ring. And I am NOT speaking of the arc welded joint that holds the front and rear halves of the crt together. Although frit is used in the sealing of glass to metal, and glass to glass, frit must be matched very closely to the expansion coefficients of the glass and metal or the frit will not hold. ON our project we have found an alternative material to conventional frit, that is used to seal fiber obtic glass threads into connectors that must hold a vacuum. This material will be used in the not to distant future when we attempt to do another rebuild of the 15GP22. We are currently working on some issues that need to be resolved before the next attmpt takes place. We will keep this community informed if and when we have some successes to report.