I was wondering if there are any testers for checking an oscilloscope CRT the way regular tubes are checked? There are CRT testers/rejuvenators out there from the old CRT TV days such as the Sencore CR70, CR143 and CR7000 testers. B&K has their 465, 466, 467, 490A and 490B CRT testers. But, are any of them capable of testing/rejuvenating a Tek 465 oscilloscope CRT?