[Elecraft] Re: Homebrew Autotuner

[wayne burdick]

On Sep 13, 2005, at 11:08 PM, Vic K2VCO wrote:

> I bet Wayne knows a good algorithm!

Indeed I do. And it took several weeks of serious R & D and coding the 
first time we developed an ATU (KAT2).

Among other things, the code uses four tuning phases, each with 
different granularities; time-based SWR target adjustment; hand-tuned, 
pseudo-grayscale switching of latching relays; SWR-based look-ahead 
tree pruning (borrowing extensively from game theory); scaled L-C 
stepping near local minima; and, when possible, L-C range prediction 
based on band information.

It was a wonderful, hair-pulling, sleep-depriving, learning experience 
that I wouldn't deny anyone by giving away the details  ;)

73,
Wayne
N6KR


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