[Elecraft] K3 audio

[Evert Bakker (PA2KW)]

Bill,

Thanks for support.
Unfortunately I do have to disappoint you about the suggestions.
I tried, but absolutely no effect when changing the RX-EQ setting.
Even when 2.4 and 1.6 were set at -16, it did not have any effect.
Except when the original audio signal became weaker due to the lowered
cut-off of the high side of the pass-band, the "hiss" became less as well.
This is already what I stated before, the level of hiss only seems to be
influenced by the audio level.

May be I introduced a misunderstanding when using the word hiss. As it seems
almost impossible for me to explain what I hear, it gave me the idea that
the word "hiss" may be not the right word for the phenomena I wont to share
we you. But I'm not able to make it clearer then I tried so far.

I can also say that it is not a pure additional sidetone but it's a
combination of several components.

73's, Evert PA2KW




-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bill W4ZV
Sent: Monday, April 06, 2009 14:11
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 audio






Evert Bakker (PA2KW) wrote:

> For me, I'm quite sure it has to do with the digitalization. That sound is
> far from natural and is ADDITIONAL to the normal audio signal. That
addition
> sounds sharp, metallic, like these "extreme low cost" jingle bell" sounds
in
> all kind of gifts (sorry for the comparison between these two). But it is
> "next" to the normal signal and many db's down.

K8ZOA replied:

There is a 3.9 KHz digitization artifact about 78 dB down from normal 
audio level. Is this what you hear?


I suspect Jack has identified Evert's problem.  The 3.9 kHz artifact should
sound exactly as Evert describes.  To check, Evert could try setting RX EQ 8
(3.2 kHz) to -16.  If this reduces the sound he's hearing, it should prove
that the 3.9 kHz artifact is causing his problem.

You should not have any reduction in intelligibility for SSB contests by
setting RX EQ 8 as above.  For CW, I normally set RX EQ 1-2 and 5-8 at -16
dB, since I normally use a 300-440 Hz pitch.   

73,  Bill  W4ZV

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