[Elecraft] MFJ's new Internal K3 Tuner, anyone tried one yet?

[Richard Solomon]

Aren't you guys through yet with the MFJ bashing ?? There's a Yahoo Group
for that, if you insist.

73, Dick, W1KSZ

On 5/12/2015 4:25 PM, Joe Subich, W4TV wrote:
> On 2015-05-12 5:45 PM, Fred Jensen wrote:
>> I believe the KAT3 tuning algorithms are contained in the K3
>> firmware which Elecraft does not disclose, so the MFJ gizmo must have
>> begun with a reverse engineering effort, always a very dicey
>> undertaking under the best of conditions.
>
> Nothing dicey about it ... MFJ doesn't even need to know anything
> about the tuning algorithms or controls.  The K3 CPU controls both
> the tuner L/C values and the antenna selection via a serial bus
> and series of serial to parallel shift registers/latches.  The only
> "engineering" MFJ needed to do was copy Elecraft's KAT3 schematic.
> The only "value engineering" is to do what Elecraft does at lower
> production costs and perhaps loser cost parts.
>
> The real question is the ethics (and legality) of copying Elecraft's
> schematic.  The only way the MFJ tuner works properly is if it copies
> the L/C values and controls exactly.
>
> 73,
>
>   ... Joe, W4TV
>
>
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