[Elecraft] Automatic tuner implementation

[Dr. William J. Schmidt]

Wayne is correct here.  If you don't use a principled approach to finding
the the best tuning solution, there are excellent binary searches that have
roots in game theory that are extremely good.  The optimum is to marry them
both.  The most successful commercial (militairy) algroithms start with a
phase-amplitude transfer function inversion to get very close to a solution
followed by a binary search to the final solution.


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Andy Durbin
Sent: Sunday, April 7, 2019 8:20 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Automatic tuner implementation

"It's all about "pruning the search tree," to borrow a term from game
theory."

That always struck me as being a bit like trying to whack a pinata while
blindfolded.     Why is it not possible to measure the complex impedance and
compute the solution?  That should be a lot faster than any iterative
method.  Sure, it needs a better detector but isn't Elecraft about elegant
solutions?

I'll probably find the answer for myself in a while as it's on the list of
things to try with my Kenwood/Elecraft interface (I have LP-100A complex
load impedance available).

Pointers to any failed or successful attempts to do this would be
appreciated.

73,
Andy, k3wyc
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