> Since the K3 turns off the final stage when below 13 watts, does
> that mean running 10 watts is a bad choice since that's running
> the lower power stage at near maximum?
As it relates to that part of the distortion caused by compression
or clipping in the amplifier chain (IF-> Low power amplifier -> PA),
running the K3 at 10 watts is probably worse than running it at 20
watts. I don't have specific data on the particular devices used
in the K3 but in general IMD is minimum around 80% of maximum rated
output.
73,
... Joe, W4TV
On 2014-11-19 6:50 AM, Ken wrote:
On Nov 10, 2014, at 7:30 PM, Joe Subich, W4TV wrote:
Depending on the crest factor (peak to average ratio) of the mode
in use, the average power from the KPA-5000 should be kept 6 to 10
dB below the rated maximum (e.g., 60 to 150 watts) just as a 100W
transceiver should be kept between 10 and 25 watts average.
Since the K3 turns off the final stage when below 13 watts, does that mean
running 10 watts is a bad choice since that's running the lower power stage at
near maximum?
From a cooling perspective alone, I have often wondered if it's better for a
K3 to be run at 15w rather than 10.
Ken WA8JXM
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