[Elecraft] BIZARRE OFFERING FROM MFJ

[Wayne Burdick]

Hi Barry,

The basic algorithm was developed for the KAT2, but it has morphed into several variations for our different tuners, including the T1, KAT1/2/3/3A/100/500/1500, and KXAT1/2/3/100. It's all about "pruning the search tree," to borrow a term from game theory.

73,
Wayne
N6KR


> On Apr 7, 2019, at 3:14 PM, Barry <barrylazar2 at gmail.com> wrote:
> 
> Wayne,
>    Is that same algorithm and code in the KX3 and K3s??
> 
> 73,
> Barry
> K3NDM
> 
> ------ Original Message ------
> From: "Wayne Burdick" <n6kr at elecraft.com>
> To: "Dr. William J. Schmidt" <bill at wjschmidt.com>
> Cc: "Elecraft Reflector" <elecraft at mailman.qth.net>
> Sent: 4/7/2019 12:32:03 PM
> Subject: Re: [Elecraft] BIZARRE OFFERING FROM MFJ
> 
>>> On Apr 7, 2019, at 9:15 AM, Dr. William J. Schmidt <bill at wjschmidt.com> wrote:
>>> 
>>> There isn't really much in the way of smarts on the clone board.  It's simply the tuner elements (coils and capacitors), a few relays, the relay driver chips, and gas tubes.  The actual tuning smarts comes from elsewhere within the K3.  This isn’t much of a stretch for a clone.
>>> 
>> 
>> 
>> That's correct. The heart of any binary-weighted L-network ATU is in the firmware, which we've been improving since I first wrote the code for the KAT2. The latest incarnation of this code is in the KAT1500, the ATU included in the KPA1500 amp. My colleague K6KR has done a great job of tweaking the algorithm to eek out that last tenth of an SWR unit on every match.
>> 
>> Wayne
>> N6KR