http://elecraft.85.s1.nabble.com/Re-Latest-Sherwood-table-tp5882563p5882613.html
> Is there a non-engineer's guide to the Sherwood table for those of us who
> are not engineers?
>
> In particular, the table is sorted by Narrow Spaced Dynamic Range, and I
> see
> that the FT5000 is listed first, but the K3 also gets a 101 in that
> column,
> albeit with a "pf" footnote instead of just an "f".
>
> I decode these footnotes to be "f" = "Measurement was Phase-Noise Limited"
> And "pf" = "Measurement was Phase-Noise Limited" and was "with 200 Hz
> 5-pole
> filter"
>
> OK - so why is the FT5000 at the top of the list? Why no indication of
> what
> filter was used in the FT5000?
>
> What is the second sort column for the table? What puts the FT5000 on
> top?
>
> What does this table really tell us? It seems that both of these receivers
> are pretty close as many of the numbers are similarly different from those
> listed below them.
>
> When a parameter is higher or lower - which is better? I presume that the
> higher the narrow-spaced dynamic range, the better, but what about 100kHz
> blocking (for example). Is higher or lower there better? The K3 is a 140
> on
> that one, and the FT5000 is a "lowly" 127. The Down-conversion Kenwood
> 590
> gets a 144 in this column - is that better or worse than the K3? But, the
> 590 only gets an 88 in the narrow-spaced dynamic range, so I guess that
> means it's much worse?
>
> How does one interpret this data?
>
> 73,
>
> Bob W5OV
>
>
>
>
>
>
>
> -----Original Message-----
> From:
[hidden email]
> [mailto:
[hidden email]] On Behalf Of Bil Tippett
> Sent: Friday, December 31, 2010 6:18 AM
> To:
[hidden email]
> Subject: Re: [Elecraft] Latest Sherwood table
>
> > I wonder how such a high performance filter would work in the K3?
> Not that its
> needed in the K3. However in the interest of science, it might be a
> worthy
> pursuit. It also might push the K3 well ahead of the FT5000 in ultimate
> performance.
>
> Not very well since it's at 70 MHz. ;-) The Inrad filters are
> already better than whatever is in the FT5000 since Sherwood measured
> ultimate rejection in the K3 at 105 dB vs 90 dB for the 5000.
>
> 73, Bill W4ZV
>
>
>
>
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