The banggood type probes do not use resistive co-ax, they fake it using a ~100R resistor in the compensation box (DC resistance in 1X mode is approx. 100 ohms). This means that anything with a fast edge will ring due to the lack of damping in the cable. Unfortunately this makes them worthless for many uses - I was hoping that any issues with them would be confined to bandwidth or physical quality but they were worse than expected.
Well its always been my understanding that the coax cable was just that coax and the 10:1 was achieved via 1M resistor switched in and out of series with the probe tip via the switch in the probe handle, I have no idea where you got the notion about resistive coax cable and a 100ohm resistor from?
It's fairly well known. I think the Hantek probes are still about $10/ea. These could be used with a better scope down the road.
Thanks Joe, I think i'll grab some of those next time I'm after cheap probes.
For those confused about the 100 ohm thing, if you measure the DC resistance of a probe in 1X mode it'll normally be a few hundred ohms - this is from the (deliberately) lossy co-ax used to damp down ringing from the impedance mismatch such a probe will invariably present to the circuit/scope input.
In the case of the banggood probes (or others which look identical - mine came from amazon) normal co-ax was used instead, probably as it was cheaper, and the probe DC resistance was from a lumped element SMD resistor in the compensation box rather than distributed resistance in a lossy co-ax cable. As the damping resistance has to be distributed to work correctly the probes were absolutely hopeless when measuring fast edges - the reflections seen on the scope were clearly from the probe rather than the circuit. See the links others have given about how probes work - it's not immediately obvious!