"Allan Mac" wrote in message
...

Hi,

the first anode (EHT) of my old 475 scope is arcing, either under the cap
or to chassis. How do I get to it? (yes I have already got the outer
casing off) Is it already a boat anchor?
Allan

Grab a copy of the service manual (google) and read up on removing the CRT.
There is no removable HV PDA cap. The HV lead is soldered to an electrode
and potted in RTV. The 475 is a very fine 200 MHz scope and worth saving.

tm