[1000mp] MP vs MkV vs Field vs K2 vs...

[Bill Tippett]

        I updated the data for BDR and IMDDR3 on the previously
cited Elecraft page based on ARRL's August 2002 QST test of the Field
(  http://www.elecraft.com/K2_perf.htm    and 
http://www.arrl.org/members-only/prodrev/pdf/pr0208.pdf  )

Close In IMD Dynamic Range and Blocking Dynamic Range at 5 kHz Signal 
Spacing (ARRL Lab Results, Preamp off on 20M, in order of IMDDR3):

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 Mark V          78             106
ICOM IC-775DSP                  77             104
ICOM IC-706 MkII G              74              86
Yaesu FT-1000MP Field           73             107
Kenwood TS-570D                 72              87
ICOM IC-756                     67              98

        Several questions came to my mind as I read this:

1.  Why do Yaesu's results vary so much?  I thought all 3 MP's 
shared the same basic receiver front-end block diagram.

2.  Why are they getting worse instead of better?   

3.  I wonder how Tentec's new Orion will fare in these tests?  

                                       73,  Bill  W4ZV