A crappy scope with a fancy gadget attached is , well , just that!
I'll have a look at the gadget you mentioned and then also look for a cheap digital scope/portable scope.
LOL, yeah, but beware though, these ancient Tek probe isolator is gigantic
, here the one I scored last year, I just let the photo speaks for it self, comparing to common current cheap DSO size. Its like the probe is swallowing it's own scope.
Luckily it works as expected, love it very much.
What did you end up going for The THS720?
4 years ago I scored a THS710A with complete accessories, actually I made a questioning thread for it during the bargaining period ->
HERE.
PS. the TPS2024B is still available, but only has generic probes. He is planning on getting some standard Tektronix probes but I told him rather not let me get the high voltage ones. Still negotiating.....
Would standard 10:1 100:1 probes not also "work" if you are willing to "live on the edge"?
Suggesting to be careful for such expensive "used" stuff, isn't this way over your budget ? My worry is as its used, the risk of its not working properly or out of cal. If that is local offer, if possible, do a physical verification. For me personally, able to do a physical verification worth 10 to 20% of the price rather than buying it online relying just on the photo and the seller's claim.
Regarding isolated probe, well, if you're willing to bet on it, here, Aliexpress's grade probe
, these are just examples, there are many same offer there. Its all fully isolated with no exposed metal at all.
Price wise, these probe is relatively cheap imo, say compared to 1st tier branded ones.
P2301C Probe 100:1 High Voltage Withstand 5KV 300MHz
https://www.aliexpress.com/item/1PCS-wholesale-P2300C-Oscilloscope-Probe-100-1-High-Voltage-Withstand-5KV-300MHz-for-oscilloscope-Tektronix-HP/32352684108.htmlP2301B Probe 10:1 BNC protective cap DC-300MHz
https://www.aliexpress.com/item/Authentic-1PCS-P2300B-Oscilloscope-Probe-BNC-protective-cap-DC-300MHz-Scope-Clip-Probe-300MHz-For-Tektronix/32352680753.htmlHope this helps.