On Sat, 15 Oct 2005 00:24:39 GMT, "Dale Parfitt"
wrote:

Just sweeping a filter designed for SSB would be fine I suppose. I recently
had an opportunity to hear the difference between a stock FT-1000 CW filter
and one homebrewed with attention paid to group delay- the difference was
very clear to hear- in favor of the homebrew filter.
\
Dale

My prefered filter has a gausian to 6db shape for less ringing and
group delay. I work for that goal.

However, try the KK7B Phasing rigs for sound. They are direct
conversion SSB (image rejecting) so all the selectivity is in the
audio bandpass. I use a miniR2 and T2 pair on 6m and filter
artifacts like group delay aren't there. Transparentcy is a good
word to describe it.


Allison
KB1GMX