Re: NEC-LIST: SRI OWL Kit Accuracy

Grant:

All things considered, the SRI OWL kit usually is accurate to within
about +/- 20% to 25% on both conductivity and relative permittivity.

George

Grant Bingeman wrote:

> Thanks, George, for your detailed reply. I made some measurements
> from 1 to 50 MHz on buried insulated and bare dipoles, and the
> measured impedances were in good agreement with NEC4D predictions.
> However, I did not make any field intensity measurements
> underground, and this is what I was interested in. That is,
> propagation thru the earth from the buried transmitting dipole to a
> buried receiving dipole. Did you measure fields above ground or
> below ground? I noticed that moisture content of the soil I was
> testing made a big difference in the bare wire case; the insulated
> wire case was not as sensitive.
>
> I tried making some soil constant measurements using a parallel
> plate capacitor arrangement without much success. For example, my
> sample of sand had way too much iron in it. How accurate is the SRI
> International kit?
>
> Thanks again for your help.
>
> Grant
Received on Thu Jun 18 1998 - 10:03:19 EDT