[Elecraft] K3 Audio Response - Version 3.33 Firmware

[Don Wilhelm]

Drew,

Hearing a bit of the opposite sideband is a natural effect of using a 
very low Shift/Lo-Cut setting.  No matter how straight sided the DSP 
filter may be, it does have a finite slope to it (if it did not have 
slope, it would ring like crazy).

IMHO it is not a problem either -
The cure for that condition is easily available to the operator, just 
set the low end a bit higher and the opposite sideband response goes 
away.  If one really wants to hear those very low frequencies, he will 
have to accept that a bit of opposite sideband will also be heard.

73,
Don W3FPR

drewko wrote:
> It sounds very nice on CW (and AM), even with my cheap headphones,
> which are not particularly bass responsive. It is a very pleasant
> extra dimension when tuning CW bands with wide open filter. It adds a
> lot to the sound. I wouldn't want to go back to the narrower sound.
>
> You can however hear a good bit more of a signal's opposite sideband
> when you tune through it with a wide filter and/or Shift set very
> low-- a couple hundred Hz or more on the opposite side for strong
> signals. I don't think that is a problem but some may complain.
>   
>