[Elecraft] Need testers for improved K3 AGC (specifically for pileup conditions)

[Scott Manthe]

Maybe those fellows at 7O6T?   ;)

73,
Scott, N9AA


On 5/5/12 5:28 PM, Wayne Burdick wrote:
> Hi all,
>
> We've significantly improved the K3's DSP AGC based on feedback from
> DXpedition users. In some cases, dozens of stations with nearly
> identical amplitude may be packed together into just a few tens or
> hundred of Hz of bandwidth. The AGC threshold can now be set much
> higher, allowing "headroom" for such signals. Any nonlinearities due
> to DSP AGC can thus be avoided for signals as high as about S9.
>
> At the same time, we've eliminated the slightly "scalloped" (non-
> monotonic) AGC curve noted by one reviewer. This was caused by
> interpolation errors in the DSP's fast log and anti-log functions,
> which are now orders of magnitude more precise. The resulting AGC
> curve is very smooth, so signals right at the threshold can't be
> modulated by AGC onset.
>
> If you'd be interested in helping us evaluate these changes, or if you
> know of someone who might benefit, please email me directly.
>
> 73,
> Wayne
> N6KR
>
>