I did a quick test using my K3 and 756ProIII. With an input of S9+40dB and
the K3's Rx frequency set to 14.200000, I set the signal generator for
14.201500 (for a 1500Hz tone).
The K3 seems to have about the same max output whether using the Line Out or
Speaker Out (on the rear of the radio), and it is less than +/- 8000 (using
Adobe Audition.
My 756ProIII has a Line Out of greater than +/- 14000.
Of course when the waveform starts clipping, you can hear the distortion,
which I can also see on the Adobe Audition frequency analysis display.
BTW, when I rotate the RF GAIN control on my K3 full counter-clockwise, it
doesn't make it up to S9+60db! Anybody else notice this? As a result, a
50mV input will not show S9+60dB.
John
N2KBE
----- Original Message -----
From: "Barry N1EU" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, May 12, 2008 12:21 PM
Subject: Re: Re[Elecraft] ceiver distortion
n4lq wrote:
The K3 has the cleanest receive audio I've see thusfar.
I'm likewise a bit skeptical (but I could be wrong) about the alleged K3
rx
audio issues. My experience is that the K3 rx audio is more "transparent"
and thus any problems with the other guy's audio will be glaringly
apparent
with the K3. This might be what some people are hearing - the bad signals
are going to sound "badder" on the K3. The K3 rx is less "forgiving"
because you are hearing better. I do seem to be noticing how bad most
signals sound on 20M ssb lately, although there is the occasional smooth
sounding signal. I routinely A/B with my Orion to confirm what I'm
hearing.
Perhaps folks who are reporting audio issues with the latest firmware can
make some WAV recordings that we can listen to, with the "good" and "bad"
firmware versions.
73,
Barry N1EU
--
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