[Yaesu] FW: roofing filters

[Cecil Acuff]

It is my understanding that the Pro III implemented a fixed 15Khz roofing 
filter like that used in the 7800 but the earlier Pro II (which I had) did 
not.  All the reading I have done on the subject indicates the 15Khz to be 
too wide to provide the full benefit so now we are seeing rigs with two and 
three selectable and narrower roofing filter bandwidths.  I believe the new 
FT-2000 is coming that way from the start.

The Sherwood Engineering page has good explanations of the whole roofing 
filter issue as does the Inrad page.

Also a correction to my earlier post....about close spaced test results was 
suppose to say Dynamic Range not IMD....My confusion on that one...

Cecil...
----- Original Message ----- 
From: "Adam Farson" <farson at shaw.ca>
To: "Yaesu Contesting Reflector" <yaesu at contesting.com>
Sent: Friday, July 21, 2006 1:14 AM
Subject: [Yaesu] FW: roofing filters


> Hi Cecil,
>
> Er...the IC-756Pro series does have 15 kHz roofing filters at the first
> (64.455 MHz) and second (455 kHz) IF's.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
>
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