Windy Dankoff KM5Q wrote:
I have the same concern as Craig. The recommendation from Robert and Vic
don't work on my K3.
Here's my scheme:
Ant. 1 is a non-resonant dipole. On 20m for example, SWR is 4.5:1. The ATU
brings it to 1:1.
Ant. 2 is a screwdriver vertical on tin roof, adjusted (with ATU bypassed)
to show 1:1.
I set the ATU for for either antenna, or one then the other, but it NEVER
auto-adjusts when I switch antennas. Never on any band or with any
(mis)tuning of my vertical, have I heard more than one relay click when
switching ANT 1/2 (no ATU reset).
Adjust the screwdriver coil for 1:1 on (for example) 7.2 MHz in BYPASS,
then switch the tuner on, and tap ATU TUNE.
Then if you switch to that antenna on 7.2 you should always get 1:1.
Keep in mind that a screwdriver has a narrow bandwidth on the low bands
and so you may have to retune if you QSY. This is not automatic with the K3.
So, I see two possibilities: either you didn't turn the tuner on and
retune after adjusting the screwdriver coil in BYPASS, or you are far
enough away from the original frequency that the SWR is high.
I guess it's possible that there's something wrong with your tuner, but
it's not a firmware issue.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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