[Elecraft] K3 Auto Notch Distortion

[Arie Kleingeld PA3A]

Toby,

The notch is outside de AGC loop. Reason: there's a long story about IMD 
and hardware AGC, which I won't quote here. Elecraft never came up with 
a programmed DSP/hardware AGC solution that would dampen this effect a bit.
A pumping AGC is probably not considered an issue. To which I disagree. 
I would think that there would be enough IMD headroom in the K3 to 
improve the reception a bit in this case.

But if it isn't there, it's not there. No receiver is perfect. Not even 
the K3.
Luckily there are a lot of good features in the K3 to compensate my sad 
feelings about this item.

73 to all,

Arie PA3A

Op 12-3-2013 15:38, Toby Pennington schreef:
>
> This has a lot to do with whether the notch is inside or outside the
> AGC circuit.  I THINK on the K3 the auto notch is outside the AGC,  and on the upconversion rigs like a 7800 Icom,  it is on the inside of the AGC circuit.  This makes for the best quality sounding auto notch.
>
>