Arie Kleingeld PA3A <[email protected]> wrote:

> Lyle,
> 
> What are you saying here?

Arie,

The K3 has excellent opposite sideband suppression (the combined suppression of 
the crystal filters in the first I.F., and the DSP in the second I.F.). 

The present change (allowing you to move the crystal filter edge) came about 
because exactly *one* customer in England claimed to be hearing an OSB image at 
extremely low pitch in CW mode in the presence of "monster" signals. This was 
the first such comment I had heard about the K3, which isn't bad considering 
we've shipped some 8000 of them.

We added the new menu entry to satisfy this demanding customer because, as I 
told him a the time, I didn't want anyone to ever hear an OSB image, no matter 
how small, on the K3. He's using the 0.3-kHz setting, though I couldn't tell 
any difference between 0.2 (the default) and 0.3.

At one point in the K3's history, 0.1 was the setting used. Even then there 
were no complaints about OSB images, so if you want lower pitch, go for it.

73,
Wayne
N6KR

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