[Elecraft] K3 - DSP ringing on CW & SSB

[n4lq]

Berni
This sounds like harmonic distortion, not ringing. It's the same thing 
people are seeing on their PSK waterfalls and calling it a "ghost". There's 
not much you can do about it.

Steve Ellington
N4LQ at insightbb.com
----- Original Message ----- 
From: "Berni G0IDA" <wberni at googlemail.com>
To: <elecraft at mailman.qth.net>
Sent: Saturday, August 30, 2008 5:42 AM
Subject: [Elecraft] K3 - DSP ringing on CW & SSB


> Hi everyone,
>
> I have had my K3 almost a week and I am very happy with it :-)
>
> I do however hear what I would describe as a ringing sound (and always), 
> perhaps caused by the DSP.
> When I tune to a CW signal with any filter configuration although less 
> pronounced using 250Hz filter the tone of the signal is good. But when I 
> tune away from it and QSY up the band & the tone gets higher in frequency 
> I can hear what I would call ringing and it is very slight but enough for 
> it to be anoying.
>
> This does not always happen and may be if I press a combination of keys 
> like NR, NB, WIDTH, SHIFT it causes this to go away, I haven't worked out 
> if it is indeed a combination of keys or not.
>
> I've tried a different set of headphones just in case the headphones 
> (Heil) were rattling but it is the same.
>
> This happens too on SSB as you tune away from the signal and is randomly 
> there or not.
>
> Perhaps there are settings which optimize this?
> I have the RX EQ set up to cut the last 2 high frequencies off by 6dB and 
> 10dB but it seems to make no difference how I set these.
>
> Does anyone else hear this very mild "Ringing"?
>
> 73's
> Berni
> G0IDA
> K3 #1474
>
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