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(Holger Menges) wrote in
m:

Hello,

I've got a problem with my Tektronix scope 7313. After switching on I
hear a crackling from the inside (only for a short time, then the main
is melting).
Has anybody of you got a similar problem with a scope from the 7000
series?
Has anybody got spare parts for the scope?

Thanks,
Holger

This is a really old scope.
Do you have a service manual?
What do you mean by the "main" is -melting-?
Is the line fuse opening?
How are the low voltage supplies? In tolerance,low ripple?

Your scope probably has a HV problem.

--
Jim Yanik
jyanik-at-kua.net