Re: Auto Antenna Tuner - MP

Lou W7HV

Yes.  I haven't quantified it, but there is an SWR threshold above which it will refuse to tune.  It'll click, and immediately quit.  It worked for me around SWR 3.5 on a few occasions, but of course it won't remember the tune.  I figure it's only rated for 3, so going much beyond that is pushing things.  The currents and voltages experienced in the ATU can go up at greater mismatches.  My other rig's ATUs are also only rated for 3.  Elecraft's internal ATUs are a notable exceptions.

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