what would be interesting is a probe design that doesn't require penetrating
the surface (e.g. I could put it on my concrete driveway)
On Fri, 27 Feb 2026 16:43:38 -0800, Brian Beezley <k6sti@att.net> wrote:
Bob Larkin, W7PUA, has developed a tiny ground probe that offers several
advantages over larger probes when measuring local ground constants. It
can provide artifact-free data to 100 MHz, it is easy to insert and
pull, and it is simple to construct.
https://www.janbob.com/electron/TinyProbe/TinyProbe.html
Wideband results in Oregon soil:
https://iili.io/qftBfsI.png
Program to process probe VNA files:
https://k6sti.neocities.org/gnd
Accuracy limitations of surface probes in stratified ground:
https://k6sti.neocities.org/sg
Generic ground constants for antenna analysis when local ground
constants are unknown:
https://k6sti.neocities.org/hfgc
Brian
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