Opinions wanted on crt rejuvenation method

[Wade Segade]

About a year ago I observed a tech with a large international electronics
company "zap" a crt with 10s of kV at about 500kHz using a Electro-Technic
BD-10AS (http://www.electrotechnicproduct.com/pinhole.asp). He claimed this
improved older tubes, but I don't remember in what way.

I have been repairing tvs and other things for about 30 years but have never
seen or heard of this before. Has anyone any information/experience/thoughts
on this? Is it a method worth trying? Would this do anything beyond causing
noise in local am radio reception?


Thanks for any thoughts on the matter.

Wade Segade
Monitor Technician
Computer Boulevard (SK)

 

[Mike Berger]

I don't see how it would do anything but show up vacuum leaks.

 

[Carl Jenkins]

Hi Wade,

I think he was using a "CRT brightener" to blast
caking off of the CRT's cathode button. They aren't
to be used more than once per CRT and usually only
improve a dim picture for a few years.

Carl