CRO probe

Aug 01, 2012 2 Replies
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Anyone tried to make a x10 CRO probe?



I've got an old Silicon Chip article (1989?) which gives some basic info, but the biggest problems involve the physical construction. My first attempt worked fine until I made the mistake of putting a drop of superglue on the trimcap - the goo must have seeped into the trimcap and changed the capacity, stuffing up the impedance match.



Anyone got an easy-to-build design using readily available bits?



Yeah, I know that new x10 CRO probes are cheap to buy, but the skill of making one yourself is what the hobby of electronics is all about, isn't it?


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"Yaputya"

** This article ?

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Published in October 2009.

... Phil

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the

A very good article, thanks for that! I recommend it to everyone who uses an oscilloscope. I still haven't found an easy way to make a basic x10 probe. I've only got a 60MHz CRO, so the the probe doesn't need to be DC to daylight. It isn't easy to shield the probe, include external trimcap adjustment and insulate the whole thing in a reasonably compact package. Perhaps it is too hard a task to build one from scratch.

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