oscilloscope probe question

[echo44]

Ok so i bought the agilent digital 100mhz scope
(its a beauty) the next question:
What probe to buy?
The scope comes with probes rated to maximum input
300volts RMS
is that too low? I know there are plate voltages >400?
the next probe is 100x:1 and is rated in the KV range
however this cost $300
what you think?

[Structo]

I can't help on the probes but congrats on getting a scope.
I have wanted one for years!

Did you get a good deal?

[vibratoking]

What probe to buy?
The scope comes with probes rated to maximum input
300volts RMS
is that too low? I know there are plate voltages >400?
the next probe is 100x:1 and is rated in the KV range
however this cost $300
what you think?

300VRMS equates to 300 * sqrt(2) ~= 425 VDC for a sine wave blah blah blah...

I use 10x probes with that rating all the time and have no issues.

Enjoy the scope.

[tonewood]

300VRMS equates to 300 * sqrt(2) ~= 425 VDC for a sine wave blah blah blah...

I use 10x probes with that rating all the time and have no issues.

Enjoy the scope.

I'm thinking RMS is equal to the DC value & that RMS * sqrt(2)=peak

[vibratoking]

I didn't state it correctly or get my point across properly.

I'm thinking RMS is equal to the DC value & that RMS * sqrt(2)=peak

425V is the peak value of a 300VRMS sine wave. If the probe can handle 425V peaks, it can handle 425VDC, IME.