[1000mp] preference question

[Joe Subich, K4IK]

NJ9K asks: 

> How does the INRAD roofing filter affect these previous 
> results?  Where these tests performed without the roofing 
> filter? 

The W8JI tests were performed prior to the availability of 
the INRAD roofing filter.  Rob Sherwood (WWW.sherweng.com) 
has also made receiver measurements ... his numbers are 
somewhat different than those of W8JI but show an 8 dB 
improvement for the INRAD roofing filter at 2 KHz. 

Radio                                   2 KHz IMD 

FT-1000D         (W8JI NB mod)  W8JI        89 dB
FT-1000 MKV      (W8JI NB mod)  W8JI        85
FT-1000MP Field  (w/INRAD)      Sherwood    77  
FT-1000D         (stock)        W8JI        72
FT-1000MP Field  (stock)        Sherwood    69
FT-1000D                        Sherwood    69
FT-1000MP                       Sherwood    68 
FT-1000MP                       W8JI        62 
FT-1000 MKV      (stock)        W8JI        60 

73, 

   ... Joe, K4IK