On 8/3/2017 12:40 PM, James Shaver (N2ADV) wrote:
I was running 10 milliwatts and had an IMD of -35dB.
Power is only the tiniest fraction of the equation.
Yes, and how much is appropriate depends entirely on the band, the
conditions, and what you want to work.
High power does not, by itself, generate trash. Poorly adjusted rigs,
poor quality rigs, use of ALC between an amp and the rig, failure to
TUNE the power amp (or running it into an un-matched antenna), running a
rig from lower than it's rated DC supply voltage, overdrive in the audio
chain between rig and computer, all generate trash.
AND -- rigs with poor strong signal handling characteristics also
generate trash that they send to the computer to decode. Yes, WSJT modes
can be used with pretty simple and inexpensive rigs, but better rigs
work better on both TX and RX. And often when someone complains of a
strong signal being trashy the trash is created in the rig of the ham
who's complaining!
I use WSJT modes only on 6M and 160M, and only for weak signal work. I
routinely run 500W on 6M, and anywhere from 5W (to finish QRP WAS on
160M) and 1500W to work DX on 160M.
BTW -- this entire discussion is out of place on this reflector, which
is for WSJT Developers.
73, Jim K9YC
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