David Sparvell wrote:
I've now got almost a kilometre of 2.5mm^2 wire in my ground system, but my
system losses (including the loading coil) are still well over 100 ohms and
consequently I've having difficulties in getting the antenna current up to
much over a couple of amps.
Hello David,
On 136kHz the loss resistance you encounter is often much more than just
groundloss. Any obstacles (trees, buildings etc...) that are relatively
close to the antenna will contribute and increase the loss.
I got stuck with a loss that varies from 120 Ohm in winter to 150 Ohm in
summer, because of the many trees surrounding my antenna. Improving the
ground system wasn't any help, doubling the radial system made the loss
drop no more than a few Ohm.
I'm running 450W and never got more than 2 amp through the system (typicaly
1.9A in winter, and 1.7A in summer).
73, Rik ON7YD
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