[Elecraft] zeroing K3 internal tuner

[Don Wilhelm]

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?
>
>