[Elecraft] Automatic tuner implementation

[Dr. William J. Schmidt]

Ideally... yes, practically... no.  Given the load impedance and the ideal
impedance, you can always calculate a transfer function that is exact
(simply the path of movement on a Smith chart).  However, the question then
becomes how good are your measurements?  A high performance line section and
detector (log amp or other) has at best an error of +/- 1db in linearity and
resolution.  The step size of the tuning elements adds more uncertainty.
Bottom line here is that what seems easy can be difficult. 



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Chuck MacCluer
Sent: Monday, April 8, 2019 9:47 AM
To: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] Automatic tuner implementation

Finding a tuner solution need not be an iterative process --- there is a
simple two-step approach if you measure the right parameter as you tune.
See QEX, Nov/Dec 2016, p. 3.  Chuck MacCluer w8mqw
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


---
This email has been checked for viruses by AVG.
https://www.avg.com