In using the Omni VI+ I have a 500 Hz CW filter in the N-1 position
(9MHz IF) and a 250 Hz CW filter in the 250 position in the 6.3 IF. If
and as necessary I use a Timewave DSP-9+ which has a 100 Hz position for
CW. Works for me on the station as I use it for 2 meter CW for EME
operation.
I agree that a 100 Hz filter in the 9 MHz IF would be a bit lossey, and
very critical with regard to usage and offer no PBT function.
73
Bob K4TAX
Clark Savage Turner wrote:
>
> On Thu, 6 Jul 2000, Jan Ditzian wrote:
>
> > Are there any really narrow filters available for either the 6 or 9 mHz.
> > IF stages of an Omni VI. By narrow, I mean 100 Hz. or narrower?
> > Especially for the first IF, which I think is 9 mHz., the one where the
> > Omni VI uses the "Narrow" button.
>
> Hi Jan -
>
> Don't know of any. The Ten Tec 250 Hz filter with the low center
> frequency (is it 500 Hz?) is a winner for me, just quiet and very little
> ringing.
>
> Now, that said, you seem to be looking for something narrower. I can only
> suggest that if you have several folks willing to pay money for such a
> filter you might talk George at INRAD into designing and building one for
> you. I have done this, George is very helpful. I suspect the losses for
> a filter at that bandwidth would be significant and the center frequency
> would be critical and require some thought. (Remember that the 9 MHz IF
> of the OMNI is fixed with regard to the PBT, and the filter center
> frequency in that IF is fixed. Makes it had to accomodate different
> tastes in CW offset.)
>
> At any rate, good luck, the fall 160 meter season will come soon.
>
> Clark
> WA3JPG
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