I have been measuring the level of harmonic spurious from my K3 #3674 and came
up with some interesting results.
I measured with the K3 connected to a dummy load and to my antennas (loop for
80-40-30 and 17m dipole for higher bands, both antennas fed by 450 ohm feeder
and Elecraft 4:1
Poul-Erik:
You have an implicit assumption that the spectrum analyzer to transmit
antenna has a flat response with respect to frequency.
That's unlikely to be the case.
Another assumption is that the spectrum analyzer antenna is in the far
field of the antenna. This is also unlikely to be the
I used a RohdeSchwarz FSH8 portable Spectrum Analyzer using a short
wire in the input connector center pin to pick up the signal from the
antennas
Using such a wire pick up will exaggerate the higher frequencies and
not give a flat response. You need to use a resistive tap or power
attenuator in
Hello Poul-Erik,
If your K3 is putting out 100 watts, it is very unlikely that it is
generating the harmonics that you are measuring, especially in the case of
the even harmonics. Your measured results may be due to some non-linear
element in the near field such as a corroded or loose connection
: Elecraft@mailman.qth.net
Emne: Re: [Elecraft] Harmonics from K3
Poul-Erik:
You have an implicit assumption that the spectrum analyzer to transmit antenna
has a flat response with respect to frequency.
That's unlikely to be the case.
Another assumption is that the spectrum analyzer antenna
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