Posted by
Jim Brown-10 on
Jan 02, 2019; 11:19pm
URL: http://elecraft.85.s1.nabble.com/Ideas-for-an-FT8-Radio-tp7647476p7647623.html
On 1/2/2019 2:56 PM, Carl J. Denbow wrote:
> While it's legal to run maximum power on FT8, or any other weak signal
> mode, it's certainly not in the spirit of the weak signal mode ethos
> Most weak-signal mode enthusiasts pride themselves on the worldwide
> contacts they can make with low wattage.
You are confusing "weak signal" with QRP. "Weak signal" means signals
are weak thanks to the mode of propagation and/or because it's a
difficult path. WSJT-X modes like FT8, JT65, and JT9 are designed for
that sort of communications -- long distances on 160M (4,000 miles and
up); E-skip, long distance tropo and moonbounce on 6M, and so on. These
modes are also useful if the station on the other end has a lot of
receive noise, and most of us do nowadays.
The moderate power levels you are espousing ARE appropriate on the HF
bands with decent antennas and moderate noise levels. BUT -- when I'm
trying to work 6,000+ miles on 160M, I run legal limit into very good
antennas, because that's a difficult path. AND -- even with that, I
often get much weaker signal reports than I transmit, often in the range
of -20 to -24, which means that I'm certainly not using too much power!
Last night on 160M, I tried for most of an hour to work an SV2, who was
6,600 miles from my QTH near San Francisco. For most of that time his
signal was weaker than -20.
73, Jim K9YC
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