Frank,
Thanks for information so far. I need time to study it.

Could you tell me the

efficiency,
antenna input resistance component
and resonant frequency,

using our standard set of input data, ie., 36 radials, 10 metres long,
when frequency is set exactly to its 1/4-wave resonant value around
8.3 MHz. Input reactance = zero or very few ohms.

Reg'

With the above parameters; summarizing the data obtained so far:

Efficiency 31.8%;
Antenna input resistance component 36.21 - j 3.1, and;
The resonant frequency 8.07 MHz.

73,

Frank