On 8 Mar 2017 18:53:52 GMT, Jasen Betts wrote:

On 2017-03-08, Winfield Hill wrote:
Cursitor Doom wrote...

Michael A. Terrell wrote:

Let's see you use it to find a stray 100 mA DC
on a crowded circuit board.

Oh come along now. You know it's not intended for
that sort of usage!

I ordered one from Newark, and plan to use it
on my messed-up switching power-supply designs.
Qualitative results will be fine.

a few years back there was talk of using a video head from a VCR
(after removing it from the drum) to probe AC currents. It should be good
to a few megahertz. a core from an ethernet transformer with a gap
added could be another option. a spool-shaped inductor would
probably work too.

A little unshielded drum-core inductor is a handy h-field probe.


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com