Rigol 300MHz scope probes

[vk6zgo]

But wait--there's more!
The derating curves on some of the probes seem to be "a trap for old players"!

I couldn't really see how the derating with frequency would be a problem, with a 1uS risetime,as the old Tek,HP,Siemens,etc probes showed no discernible max voltage derating until well above 1MHz.
See fig (7) in this link:
http://assets.tequipment.net/assets/1/26/Documents/P6105A_Instructions.pdf.

On looking back at some earlier threads,it appears that Rigol probes start to derate in the 10s of kHz.

https://www.eevblog.com/forum/beginners/scope-maximum-input-voltage-(dc-an-ac)/

Being used to the Tek probes,I could have easily blown up a cheapie Jaycar probe,which probably share the same,or similar curve.
Probably the plugin in the 7613 would just "grunt" & get in with its life,but it is a sobering thought.

I have blown the end off a probe in the grid circuit of a  MF Broadcast PA stage,many moons ago,in the dark reaches of the night when the brain doesn't work well.
Didn't bother the 465---,bit hard explaining it to the Boss,though! 

[tautech]

Probe use should NEVER assume frequency derating OR max probe voltages, to do so puts yourself and your scope at risk.
That funny graph on the bit of paper in the probe packet is to be kept and referred to regularly, especially when probing at elevated voltages and frequencies. It matters not what ANY other manufacturers ratings might be, the only thing that matters are the specs for the probe you are using. Significant variation across various 10:1 probe brands lead me to get cheap100:1 probes for safety and sanity.

[tggzzz]

x100 probes were unheard of in the old tube days,when "400-odd" volts wasn't at all unusual

Or the analogue computers with patch-panels. It was drummed into you, in two ways, that the "wrong" end of the patch cord had 100VDC on it!

[vk6zgo]

Probe use should NEVER assume frequency derating OR max probe voltages, to do so puts yourself and your scope at risk.
That funny graph on the bit of paper in the probe packet is to be kept and referred to regularly, especially when probing at elevated voltages and frequencies. It matters not what ANY other manufacturers ratings might be, the only thing that matters are the specs for the probe you are using. Significant variation across various 10:1 probe brands lead me to get cheap100:1 probes for safety and sanity.

Or,only use old Tektronix 10:1 probes!

I like the ones that were used on 545B's---"built like a brick dunny",they've already lasted half a century.
Not that big on frequency response,but good enough for a lot of work!

Strangely,the only time I have found it really necessary to use a 100:1 probe was for the high impedance,rather than the voltage division.

The equipment manufacturer suggested the use of an active probe with a high impedance.
It was  a fairly rare adjustment.,& quite frankly,"Boss,I need an active probe to this specification" just wasn't going to fly.

The 100:1 had the right input impedance,the display was a bit noisy,but the tweak was "do-able",so it was "all good",& we ended up with a useful probe.