It would be interesting to recreate the measurements at other locations. My
location has 500 feet of sand below me. It would be a great improvement just
to have poor soil.


"Walter Maxwell" wrote in message
...
Hi Reg,

You've presented a very interesting way of measuring soil characteristics.
When
I return to Florida in November I'm going to use your method of measuring
the
soil underneath the dipole whose impedances I measured over the frequency
range
14 to 15 MHz at various heights above ground, including one set of
measurements
with the dipole lying on the ground.

One of the reasons I offered to distribute the data from my measurements
is to
see whether anyone can deduce any soil characteristics from the changes in
impedance with height. The changes are significant. For example, the
terminal
impedance with the dipole on the ground runs from 470 + j250 at 14 MHz to
570 +
j132 at 15 MHz. The inductive reactance doesn't become capacitive until
the
dipole is 2 ft off the ground. In addition, except at zero height, the
resistance component decreases with height, but for every height the
resistance
increases with frequency. Do you think any of the soil characteristics
could be
determined by such data?

Would you like a copy of my data, just fer the helovit?

Walt, W2DU