[sdiy] scope sort of on the fritz

[aankrom]

It's still a good scope for general audio work. sometimes the timing 
gets the hiccups. It seems to settle down after it's been on for a few 
hours.
AA

On Tue, 22 Nov 2011 22:40:47 +0000, Gordon JC Pearce wrote:
> On Tue, 22 Nov 2011 15:31:09 -0500
> aankrom <aankrom at bluemarble.net> wrote:
>
>> I have a scope that has begun to need a lot longer to warm up and 
>> give
>> me a trace. What's probably the most likely culprit? It's a 60 MHz
>> Beckman Industrial, probably 80's vintage. My guess is a cap going 
>> bad
>> in the high voltage supply...
>
> Highly unlikely.  Capacitors rarely fail.  You're much more likely to
> find a high-value resistor somewhere in the brightness circuit
> gradually drifting higher and becoming temperature sensitive.