Thanks, again, Paul --
Although, I am not seeing it yet ... unless you are interpreting
the chart/graph that appears at the bottom of page 3 on the brochure.
THE KENWOOD BROCHURE SAYS:
On 15, 20, 40, 80 or 160 meters, the TS-590S employs
down conversion* for the first IF (11.374 MHz).
What really determines RX performance is the 2nd
Roofing Filter, after the post amplifier. The TS-590S
comes equipped with a 500 Hz and 2.7 KHz BW 6-pole MCF.
This results in superb dynamic range when adjacent signals
are present, performance that was not previously
possible using up conversion.
*For 1.8/3.5/7/14/21 MHz Amateur bands, when receiving
in CW/FSK/SSB modes down conversion is selected automatically
if the final passband is 2.7 kHz or less.
THE TEN-TEC EAGLE BROCHURE SAYS:
IMD3 Dynamic Range: 100dB/20kHz, 99dB/2kHz, 300 Hz BW,
preamp off
Blocking Dynamic Range: 141dB/20kHz, 130dB/2kHz, 500 Hz BW,
preamp off
Can someone with greater expertise than I have say which is
better and why?
============================= K8JHR ===============================
On 9/29/2010 6:33 PM, Paul Christensen wrote:
>> "I looked all over the Kenwood TX-590 product brochure and cannot find a
>> clear specification for dynamic range. Not that it is the only spec of
>> interest, but the Kenwood company says it is a "K-3" killer, with "best
>> of class" dynamic range..."
>
> It's there. Sort of. See the graph on p. 3 of the TS-590 brochure:
>
> http://www.kenwoodusa.com/UserFiles/File/UnitedStates/Communications/AMA/Brochures/TS-590.pdf
>
> Note that Kenwood claims 2 kHz DR (500Hz, preamp off) in excess of 107 dB.
> Pretty extraordinary right? But note that the claim is on 20m where a
> down-conversion scheme to 11 MHz is used. What about WARC and 10m? If
> those bands are using up-conversion, then there will likely be a big
> disparity in attainable DR across bands. The TS-590's down-conversion
> scheme is optimized where contesters need it most.
>
> By contrast, the Eagle's design should result in reasonably uniform DR
> across HF bands, at least through 10m. Hopefully, Sherwood, QST, and RadCom
> are ready to spend more band-by-band time with their measurements because
> the variation in results is going to be very interesting.
>
> Paul, W9AC
>
>
>
>
>
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