My KX-line tuner (the KXAT100 installed in the KXPA100 amp) recently started an odd behavior. I wonder if anyone can help explain it. When tuning into an indoor Buddipole set at resonance, the ATU finds a near-perfect solution when the power applied during tuning stays below about 40 watts. With the ATU set in “auto” however, if the power out is higher than 40 watts the tuner hunts without stopping. I have watched the SWR readings change, often going briefly to 1.0 or 1.1:1, but the tuner just keeps hunting, endlessly, even when the frequency is unchanged. Yet when it is first tuned at a lower power, either in Auto or Manual-tune, and the ATU is set to Manual, it stays at the solution perfectly well no matter how high the power goes. I can live with this, just by tuning at low power and then switching to Manual, but I wonder why the Auto function works well up to a certain point but goes berserk at any power higher than that? Is the higher ERP sneaking back into the control circuitry somehow?
Ted, KN1CBR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
