Jim,
Thank your for the explanation. As you say, we see things differently -
I would never view 160m, 80m and 40m as comprising more than half our HF
spectrum allocation!
73,
Steve G3TXQ
On 18/04/2012 00:12, Jim Brown wrote:
> An important difference between my view and yours is that I think, and
> look at plots, with a log frequency axis, and so does mother nature.
> 160M, 80M, and 40M are very important bands to me, (and some guys like
> to work 60M). On a log basis, those four bands ARE more than half of our
> spectrum below 30 MHz, and #31 cores are NOT predominantly resistive
> below 10 MHz! (The word "predominantly" means to me that the impedance
> is significantly more resistive than inductive, not within 20-30% of the
> same, and even with #31, resistance is still only 20-30% greater than XL
> between 7 and 15 MHz for most sizes of cores.
>
>
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