Peter:
I would say that it depends upon the individual preference of the
operator. I run an Omni V on CW with 500 / 1.8Nar. The frequency
response of that combination is what my old ears prefer. In unusual /
contest conditions, I switch to 250 / 1.8Nar. That really narrows it
down, in combination with the PBT / Fade / BP controls. In extreme
cases, I kick in the NIR-12.
See you in the pileups --
Mitch
KG9DB
> -----Original Message-----
> From: Peter A. Klein [SMTP:pklein@seattleu.edu]
> Sent: Wednesday, February 25, 1998 2:08 PM
> To: tentec@contesting.com
> Subject: [TenTec] Dual 250 Hz filters--worth it?
>
>
> Here's a question for you "ultimate selectivity" Omni V and VI people.
>
>
> How much better is having a 250 Hz filter in both the 6.3 and 9 mHz
> (NAR)
> IFs? Do you often use them in combination, or is it only when the
> going
> gets *really* rough in a contest or pileup?
>
> I currently have a 250 Hz in the 6.3 IF and a 500 Hz filter in the 9
> mHz
> IF. I've never owned a 250 Hz filter before, and I'm really happy I
> got
> one for my Omni. The reduction in *noise* is in some respects nicer
> than the reduction in QRM, when compared to cascaded 500 Hz filters.
>
> So, how much of a jump in performance is cascaded 250 Hz filters from
> a
> 250 and a 500? I understand that I would have better "skirts" and
> possibly
> a little less noise. But does it really matter much in *practice*, or
> is
> it beyond the point of diminishing returns for most of us?
>
> 73,
> Peter - KD7MW
> ---
> * My opinions do not necessarily represent those of Seattle
> University.
> * Newsreaders may have an incorrect return address. Use
> pklein@seattleu.edu
>
> Peter A. Klein (pklein@seattleu.edu) : -----==3== ---
> ---
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