Sparklies in the picture

[6GH8cowboy]

Working on a RCA KCS126 chassis for a fellow collector. Replacing 7 missing tubes, fixed the vertical, an AGC issue, whiskers in the brightness control, and a blown balun in the tuner, I now have sparkles in the picture. Now, I'm not talking snow or low signal noise, I'm talking white fine dots like folks used to get on satellite receivers. I've looked for noise sources near me and bad antenna cable connections, battery chargers, light fixtures, as well as internal to the chassis itself. No luck. I'll include a photo but the dots dont show up well at all. There seems to be no corona or arching in the HV fly-back area. The CRT test weak but is giving a decent image.
Any ideas?