Good to hear it´s going better Dennis so keep safe and watch out for THE virus. René

Thanx, great info!! René

#file-notice

Thanx for the info David. I had the same experience with trace intensity variations on a 547. After several hours searching and measuring it was a voltage variation on the grid of V800, and so increas

Just DL the complete book in PDF at this site; https://archive.org/details/keller1991cathode-ray/mode/2up It´s opensource so free for everyone :-) René

Good find Gregor! I was following this topic for a few days because HV problems are always interesting. Congrats and thanx for the detailed explanations with pictures, René

Thanx John (and Hakan), hopefully never needed ;-) René

Interesting story Dennis, thanx for that. René

Thanx Bill, good piece of information. René

Thanx Dave, important piece of information for anyone who´s interested in. René

Interesting pdf´s Richard, thanx for that. René

Effective solution Ernesto to put a fan on the HV section, I did the same with my 647A. Worked good before the fan but better safe then sorry. The temp from the core of the transformer is lowering abo

Sad news to hear. Remembered him with all the detailed contributions here, a pleasure to read. My condolances to his family and loveones. R.I.P. René

Very usefull piece of information, thanx!! René

Thanx for that, great value!! René

Good to know Chuck and a good find! René

Many thanx for all your endless contributions in all those years Graig. And it will others giving a hard time to do the same at that level of always in detail trying to solve the problems. Have a good

Great piece of information, a big thanx for the people who made this possible. René

Thanx Graig, good for the dark winter evenings. René

Very interesting pictures from a gone era, thanx for sharing. René

I´m going to solder a 1m RG223 cable for my SG503 so this is interesting stuff for me. Nice detailed piece of work Dennis, thanx!!