Steve,
My suspicion is that the impedance at the shack end of your feedline is
quite low on those bands where you are having trouble. Try adding 1/8
to 1/4 wavelength of feedline and give it another try. Many autotuners
do not like low impedances.
Otherwise the K3 internal tuner can match an SWR of 10:1 or less.
73,
W3FPR
On 10/23/2014 4:33 PM, zabarnick . wrote:
Since I exclusively use balanced ladder line fed antennas, I have been
using an external Palstar balanced tuner rather than my K3 internal
KAT3 tuner. Recently, I've decided to give the internal tuner another
try.
I find that on some bands, even though the KAT3 brings the SWR match
below 2:1, the transmitter output power is reduced from 100 watts to
the 60-70 watt range. I don't see this issue with the external tuner,
but I can almost always find a 1:1 match. Is this because my muti-band
non-resonant doublet is providing impedances that are too difficult
for the KAT3 to match? Or is something more sinister afoot?
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