I use DXLabs WinWarbler at this end, and since I posted that
original question I've added both the 500 Hz and 250 Hz CW filters to my
IC-746. It is amazing for PSK and RTTY. Once I get the signal within the
passband - easy enough in WW - I just hit the narrow filter and almost
any QRM is gone. I get a little bit of ringing with the 250 Hz filter,
but the signal decodes perfectly, which is the only end result I was
trying for. Wish I'd thought of trying that sooner!
73
Dave
KB3MOW
Patricia Gibbons wrote:
Yes, I have MIXW, with a tigertronics SignaLinkUSB interface,
connected to a Yaesu FT897D ..
In digital mode, I can select the 500 Hz CW filter, then using the IF
shift, I move the IF passband so that it is centered on the signal
being received .. generally when channel center is between 1000 hz and
1500 Hz...
without the IF shift / passband tuning turned on, I find that the
passband of the CW filter is centered within the SSB channel, i.e.
centered on 1500 hz on the waterfall display .. works fairly well ..
Elaine / WA6UBE ..
--- In [email protected]
<mailto:digitalradio%40yahoogroups.com>, "Dave" <[EMAIL PROTECTED]> wrote:
>
> Has anyone tried using either a 250 Hz or 500 Hz filter for PSK31
> reception? My Icom IC-746 (non-Pro) has no filters installed, and is
> wide as a barn door on USB for PSK31. I wondered if either of these
> filters would help, or would they be too narrow?
>
> The pass-band shift does a fair job of eliminating QRM from one side
> or the other of the selected frequency, but when there are two very
> strong signals within 2 Khz on each side at the same time, they just
> aren't effective on both.
>
> Any input appreciated!
>
> Thanks in advance es 73
> Dave
> KB3MOW
>
------------------------------------------------------------------------
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 269.0.0/751 - Release Date: 4/7/2007 10:57 PM
