Nate,
Since the problem is intermittent, I would not suspect a problem with an
active component.
You might want to remove the bottom cover and check to be certain the
hardware on the BNC jack is tight and the LPF on the BNC connector is
properly positioned. You may have to lift the KXAT3 to check - see
Figure 43 of the KX3 Kit Assembly Manual.
73,
Don W3FPR
On 4/16/2017 4:55 AM, nate t wrote:
Hi,
I was working with my KX3 earlier today, RX only, using an endfed, while
running on batteries, RXing WSPR and PSK31.
After running for a bit, the ATU seemed to stop working. Attempting to retune
on 40m, it would stick at a 25.4:1 SWR.
Tried switching down to 20m and it retuned right away to a 1.3:1. Applying
external power to the unit, I tried tuning again on 40m (battery was reporting
10V if I recall correctly); It then tuned the end fed up, but only to a 1.7,
which it will typically match to a 1.0:1, it would also get stuck at the 25.4:1
SWR on some of the attempted tunes.
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