[John Engineer]

Hello Stan

Thank you for your reply,

before you kindly posted, I replaced all the +12v / -12v caps in the scope as these voltages are used on the CRT board.

I was running out of ideas and this was a final hunch just in case they had gone dry, they had the scope looks like new again with all text crystal sharp.
I'm so happy,

As this was a slow degrade over many years, you don't tend to notice the focus issue until it gets really bad.

Anyway thank you very much for your reply, the link you posted makes great reading.

Thanks again

John