[Elecraft] [Elecraft-K3] K3S to be discontinued

[Wayne Burdick]

The hardware is in place. Some firmware is required that will be phased in when it's ready.

Wayne


> On Nov 4, 2019, at 8:13 AM, Grant Youngman <ghyoungman at gmail.com> wrote:
> 
> Well, that’s very good news.  Unless I’ve missed it, this is first note I've seen that confirms predistortion corrections in the K4.
> 
> Grant NQ5T
> 
>> On Nov 4, 2019, at 10:58 AM, Wayne Burdick <n6kr at elecraft.com> wrote:
>> 
>> This is why the K4 (and a small number of other transceivers) include "active predistortion" capability in hardware. It adapts the drive power to the response curve of the PA stage. The K4 also has an TX sample input to include an external amplifier in the correction loop. (The KPA1500 has a TX sample output for this purpose.)
>> 
>> We expect to post numbers significantly better than the industry's typical 3rd-order intermod performance at 100 W, which stands at about -30 dBc (ARRL method).
>> 
>> 73,
>> Wayne
>> N6KR
>> 
>> 
>