[1000mp] W2VJN Comments on Roofing Filter IF Adjustment

[Mike Schatzberg]

Hello Pete:

>From an insertion loss point of view, permitting a significant reduction in
IF gain setting, in menu 9-1, and thus accomplishing both the stated
promised improvements in IMD reduction, whiskering, etc., as well as the
unstated improvement in noise floor reduction.  The later production units,
which may have the lower insertion loss crystal filters,  as perhaps does
yours for all anyone knows, will function to serve as both mods ( roofing
filter and IF amp) at once.

This does not mean the earlier filters do not work.  The later ones
apparently further improve the quietness of the receiver also.

Regards,

Mike
----- Original Message ----- 
From: "Pete Smith" <n4zr at contesting.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>; "All about Yaesu
1000mp" <1000mp at mailman.qth.net>
Sent: Tuesday, February 01, 2005 3:37 PM
Subject: Re: [1000mp] W2VJN Comments on Roofing Filter IF Adjustment


> I do not understand this statement.  Do you mean late-production roofing
> filters are better, or what?
>
> If the former, then I doubt George would agree with you.  I have a second
> run roofing filter, and certainly feel it is a huge improvement in my Mark
5.
>
> 73, Pete N4ZR
>
> At 02:52 PM 2/1/2005, Mike Schatzberg wrote:
> >The newer crystal filters are working incredibly well, far more
efficiently
> >than the earliest units which were produced by Inrad.
>
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