I ran my K3/10 (12w max) for about a year without an amplifier and
had good success getting out on SSB (CW is way easier so probably an
amplifier is less needed). I have checked into the Elecraft SSB Net
several times with 12w using either the K3/10 or the KX3,
barefoot. I do use a Hygain TH3mk4 3-element yagi at 50-feet on 20m
so that provides about 6-8 dB gain.
It seems there is a good path between me and NS7P, and Phil hears
pretty good with his setup.
I have operated on 80m SSB on nets here in AK and had good luck
running only 12w on an inverted-V.
But if conditions are not particularly good, running 270w on 20m does
help (13.5 dB or little over 2 s-units increase).
On the whole, 100w seems a good level since so many HF rigs run that
and get out OK. I suspect the new Elecraft KXPA100 will be very popular.
Of course during DX pileups or contests having a big signal really
makes it. For instance, I run 125w with a 6-element yagi on 6m and
makes working an opening much easier when folks can hear me well (I'm
the "DX"). When I finish the 1100w 6m PA I expect that will make
things possible without openings (using eme or ms, that is).
73, Ed - KL7UW
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