Steve said, Is the UNUN approach better or
worse or about the same as the reactive antenna with series capacitor
approach?
I think the answer to your question depends entirely on the quality of your
unun or matching components. I have a 25+J0 vertical that is matched with a
coil and capacitor. The coil is optimized for Q by using proper dimensioning.
The capacitor is an old (WW2 surplus) transmitting mica of 2000pf. I have
checked this matching unit for any temperature rise after running 1Kw plus for
hours in contests. It wont even melt the snow around it. No detectable
temperature rise at all which should mean LOW losses. I have not tried ferrites
in this application but in other applications have seen temperature rises from
their losses. The unun specs should be revealing. As always YMMV
Lee K7TJR Oregon
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