On Wed, Jun 17, 2009 at 07:13, Paul Christensen<w...@arrl.net> wrote:
>> Two weeks ago, in my friend's shack I compared K3,IC7700,IC7800(by ear
>> ONLY), since there are no major contest in that day, so I can't say
>> anything about "dynamic range " or something like that.
>> IMHO, ic7700's DSP is best, 7800 DSP also better than K3. [A/B compare
>> NR NB and DSP filter function].
>
> I also own all three ('7700/'7800/K3) and I've been comparing the three rigs
> for the past year. Not one of them really stands out against the other when
> comparing the NR function in SSB, nor CW modes. In my experience, the two
> radios with the best NR function are the Kenwood TS-480 (CW) and the Ten Tec
> Omni Six (SSB).
>
> On the TS-480, Kenwood developed a DSP CW peaking filter in the NR2 position
> that actually seems to extract CW out from under the noise. Engaging that
> function has often made the difference between copy and no-copy. I cannot
> say the same for any other radio. Likewise, the Omni Six NR function
> somehow manages to peak the SSB audio passband when engaged and never did I
> hear an audio attenuating effect as I do with the '7700 and '7800 -- even
> under weak signal conditions. The two Icoms seem particularly vulnerable to
> attenuation as the NR function is increased and I find their NR function to
> be nearly useless unless signal strength is strong.
Paul, I have noticed this same behavior with my K2+DSP, but I haven't
been able to duplicate on my K3 (maybe because the DSP parameters are
not as easily configurable). The ability to pull a signal out of the
noise with the K2+DSP is profound, but I profess I have not used a
TS480 either.
Jeff N6GQ
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
