Scopes

[JohnHacker1]

I would NOT use the scope for making high voltage measurements-use a meter-more accurate and a cheaper fix.
The voltage accuracy of scopes of that era are only about +/- 3 to 5%.
A modern meter on DC could be less than +/-1%.
Many can also go up to 1KV.
See what your probes can handle for AC voltage.
A 20 mhz scope with a 100 mhz probe will only display up to 20 mhz.
The bandwidth of a scope is built into the vertical amplifiers-not the probes.