What radio are you using?
With my Omni VI/Opt1 I use the 9 Mhz 500 Hz RTTY filter for PSK31 and find I
get great results with it. I've written a macro in MixW that centers that
signal in the filter passband and then selects the narrow filter. It's
great when I find a very weak trace on the screen that is being hidden by
stronger signals... the formerly weak signal suddenly becomes very
decodable.
I have tried the other filters, and have found the 6 Mhz 250 Hz filter to be
of use as well, and have another macro set up for it. But, I find that I
can combine passband tuning with the 9 Mhz narrow filter and pretty much get
rid of any interfering signal.
Hope this helps,
- jgc
John Clifford KD7KGX
Heathkit HW-9 WARC/HFT-9/HM-9
Elecraft K2 #1678 /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100
Ten-Tec Omni VI/Opt1
email: kd7kgx@arrl.net
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Clark Savage Turner
> Sent: Wednesday, February 12, 2003 11:30 AM
> To: tentec@contesting.com
> Subject: [TenTec] filters for digital modes and qrp
>
>
> I plan to try out some digital modes and wonder if 500 Hz filters are
> the narrowest reasonable bandwidth to use. Would a 250 Hz filter rule
> out PACTOR? I haven't operated these modes but want to try, thinking
> about filters.
>
> Clark
> WA3JPG
>
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