[TowerTalk] W7PUA Tiny Ground Probe

[Jim Lux]

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 at 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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