[1000mp] Filters for 1000mp

[Jay Bromley]

HI Alex,
That is how I did it, a little at a time.  It really depends on what you are 
trying to do.  I don't have the 125 Hz in my rig, because I like RTTY, so I 
stop at 250 Hz of BW.  But if you are really into low band DXing and 
contesting I would sure give the 125's some consideration!

On SSB I like the 2.2 Khz units.  For me the 1.8 Khz are too tight.

The roofing filter is a very good option for what you are trying to do.  I 
have an Inrad 400 hz unit in the sub receiver.

Here is the break down on my Mark V Field.

Dual 2.8 Inrads
Dual 2.2 Inrads
Dual 500 Inrads
Dual 250 Inrads
Roofing filter
400 hz filter in Sub RX

Does all this work??  You betcha!!  Do I cringe when I think of all the 
money spent on filtering?  I don't like to think that much, grin. :-)

73 de jay..



> Hi guys,
>
>
>
> is there any "common sense" filter configuration for the MP ?
>
> I am doing a little bit of contesting here and getting sick already of 
> 500Hz OEM filter the radio come with.
>
> the filter set I have in mind is INRAD 708B 250Hz filter on 8.2M and INRAD 
> 704C 125Hz filter on 455k.
>
> Isn't 125 too narrow? Should I go with 250 @ 455k?
>
> What about SSB mode, 2.1 or 1.8? And what IF?
>
>
>
> I understand that I can spend a grand and fill up all the slots in radio. 
> Can I do it gradually? Something like putting only one 250 Hz filter, 
> trying it out, adding 125 if it feels too wide etc.
>
>
>
> Alex NE7L
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