[Test-Equipment] Advice about used scopes

[David DiGiacomo]

>I've been told that the CRT is a popular failure in the 7000 series.
>But it can be tested for remaining life simply by advancing the
>brightness control slowly to max.  If the trace brightness tops out
>and then gets dimmer, the CRT's on its last legs.

My experience is that the CRT is about the most reliable part in the scope.

I have never seen a 7000 series CRT with double peaking (the problem you
describe).