[1000mp] 1000MP-MV Filter choice

Wed, 27 Mar 2002 07:51:52 -0500

Dear Thomas:
    First get Inrad filters for the main IF - I also have an Inrad
mechanical 500 Hz filter in the second IF at 500 Hz that hears out to about
650 Hz.  Since it is -3db at 500+ Hz by specification.  They are cheaper and
better than Yaesu in the USA.
    I think if you want only one 1.8 SSB filter get one for the 8.8 MHz IF.
Knock down the side signals before they get to 455 Khz.
    I use a 250 & 500 at 8.8 Khz and a 400 at 455 Khz.
If I want little wider passband, I use the 500 at 8.8 and an SSB filter at
455 KHz to open the side skirts of the passband.  This makes the IF about
700 Khz usable
    I have a regular FT-1000MP from late 1997.
Good Luck        73,    George    K8GG

----- Original Message -----
From: "Thomas Rudolph" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 27, 2002 5:24 AM
Subject: [1000mp] 1000MP-MV Filter choice


> Hello,
>
> I'm new to this list and to the 1000MP-MV , and like many of you before,
> I'm just asking me what additional filters to buy. Of course the answer is
> 'it depends' , but maybe someone can help me with his experiences.
>
> I am especially interested in experiences/informations, if, for a given
> bandwith,
> you really need to intall the filters for both IF freq. (8M/455k).
> For instance, you want 1.8 MHz Bandwith for SSB, do you have to buy both
1.8
> filters or
> do you reach nearly the same result with a stock 2.4 in the 8M IF and a
1.8
> in the 455k IF ????
>
> An I am also interested in general experiences and hints which IF filters
to
> buy (from INRAD).
>
> My prefered operating modes are SSB (only DX/Contest), CW
> (DX/Contest/Ragchew) and digital modes.
>
> My idea for now is to have the following bandwiths:
>
> 2.4k  YAESU (SSB wide)
> 1.8k  INRAD (SSB narrow / CW wide)
> 1k    INRAD (not sure if I need it for another CW wide)
> 500Hz YAESU (RTTY)
> 400Hz INRAD (CW narrow and digital modes)
>
> But I do not know how to combine this bandwiths within the two IF stages.
>
> My idea:
> 8M:   2.4k SSB ,  1K CW
> 455k: 1.8k SSB, 500Hz RTTY, 400Hz CW
>
> I really don't now if this is ok, and if I also need 1.8k and 400Hz within
> 8M IF.
>
>
> Of course I walked through the archives of this list, but I did not find
all
> answers.
> So it would nice if someone can help me, and I hope you understand my bad
> English...
> Maybe I can sometimes give a summary with 'the ultimate' filter
combination
> ;-)
>
>
> Best 73 and tnx in advance de DK3DUA
> Thomas
>
> email: [email protected]
>
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