Re: K3 Audio Response - Version 3.33 Firmware
Posted by
Don Wilhelm-4 on
Sep 19, 2009; 2:29pm
URL: http://elecraft.85.s1.nabble.com/K3-Audio-Response-Version-3-33-Firmware-tp3673422p3675595.html
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.
>
>
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