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Micsig CP1003/CP503 100MHz/50MHz Current Probe

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Hydron:
<$500 is a pretty ground-breaking price if these are the same type of probe as Tek/Hikoi, i.e. thin-film hall sensor with nulling coil/amplifier. Still pricey but we certainly would have bought a couple in a place I worked where the $4k or more to get a tek probe+amp put off the bean-counters (we muddled through using an iProber). I'd even consider $500 for a hobby purchase - these type of probes (where you're not worrying so much about nulling the earth's field, or <5MHz BW limiting their use) are pretty great to have available.

Dave, a quick and dirty way of measuring them would be to break out a sig-gen output via a loop section big enough to clamp around, then terminate it with 50R and derive the reference current from the voltage across the termination (is this what you meant by series resistor?).

There are some high-BW CTs you can pick up second hand as well for comparison, e.g. some of the Tek CT-x range, or Pearson units (I've got a couple of these: https://pearsonelectronics.com/pdf/2877.pdf) but they normally go for good money. It's not necessarily trivial to get a good measurement result once you get to those frequencies though, either to characterise the probe or for in-circuit use, so I'd say that any sizable premium for the 100MHz version vs the 50MHz one wouldn't be worth it in most cases.

nctnico:
A really good test is to use a square wave current (1A / 10A) with steep edges so you can see whether the changeover between HAL and inductive sensing is working correctly.

Martin72:

--- Quote ---<$500 is a pretty ground-breaking price if these are the same type of probe as Tek/Hikoi, i.e. thin-film hall sensor with nulling coil/amplifier.
--- End quote ---

It got degaussing function so I guess it follows this principle.
Last year I got a tek clone from instrance, not bad, better than all probes you can buy without degaussing, but it got overshoots and the inside building quality was bad.
So hopes are high micsig will do it better, the CP2100 series from micsic are having a superb building quality outside and inside...

electr_peter:
On Saelig site, CP503/CP1003 is ~500-700 USD, CP503B/CP1003B is double(!) at  ~1000-1200 USD. Price difference makes no sense to me, because B version just has different form factor with same specs.
CP503B at ~$500 is interesting, though.

EEVblog:

--- Quote from: electr_peter on November 19, 2022, 10:20:51 pm ---On Saelig site, CP503/CP1003 is ~500-700 USD, CP503B/CP1003B is double(!) at  ~1000-1200 USD. Price difference makes no sense to me, because B version just has different form factor with same specs.
CP503B at ~$500 is interesting, though.
--- End quote ---

Sounds like I'm going to own the market then  ;D

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