[1000mp] Rig Comparisons - ARRL Lab Results

[Barry N1EU]

These figures were fuel for much discussion about a year ago, if my memory 
is correct.  I've examined the swept curves for several of these rigs from 
the ARRL expanded test reports and corresponded privately with Mike Tracey 
at the ARRL labs and have concluded that this table of figures, which has 
been widely circulated, is an inaccurate presentation of the relative 
performance of these radios.  I urge interested parties to examine the 
BDR/IMD curves themselves.  ARRL members can download the reviews at 
http://www.arrl.org/members-only/prodrev/bymfg.html

For example, close-in BDR for the K2, Omni 6+ and 1000MP from the ARRL's own 
published graphs reveal figures of 116dB, 86dB, and 108dB respectively, 
disagreeing considerably from this table.  As soon as the spacing is greater 
than 10Khz, the 1000MP beats the K2.  At a spacing of 20Khz, the 1000MP 
delivers almost 20dB better BDR than the K2 and 15dB better than the Omni 
6+.

73,
Barry  N1EU
www.albany.net/~bg


>From: k6se@juno.com
>
>Close In IMD Dynamic Range and Blocking Dynamic Range at 5 kHz Signal
>Spacing (ARRL Lab Results)
>
>(Pre-amp off, 20M)
>
>     Rig            IMDDR3   BDR
>Elecraft K2          88     126
>Ten-Tec Omni 6+      86     119
>Yaesu FT-1000MP      83     111
>ICOM IC-756 Pro      80     104
>Yaesu FT-1000MP MkV  78     106
>ICOM IC-775DSP       77     104
>ICOM IC-706 MkII G   74      86
>Kenwood TS-570D      72      87
>ICOM IC-756          67      98


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