Hi Jeff,
I had a similar experience with my Argosy. Then I discovered that
tweaking the alignment so that the desired signal falls into the center
of the filter passband made a BIG difference. Now the narrowed passband
enhances weak signals. I still touch up my Argosy alignment about every
3 years.
I don't know the Omni6, but a similar minor adjustment may be possible
with it, too.
73, Blair k3yd
-----Original Message-----
From: Jeff Frank <jafrank@nyc.rr.com>
To: TenTec@contesting.com
Sent: Sat, 16 Jun 2007 9:19 am
Subject: [TenTec] WIDER FILTER FOR WEAK CW DXING?
I have an Omni 6 opt 1, which I like very much, but on weak cw signals,
my
experience with the filters seems counter-intuitive. I almost always
have easier
and clearer copy on weak cw signals when I use the 1.8 khz filter vs.
the .5 or
.25 khz filters in my 6.3 mhz IF. I've got nothing in the N1 position.
Is this
the way it's suppposed to be? I always thought narrowing the filter
bandwidth is
supposed to cut down on noise but it seems opposite. Has it got
something to do
with receivers that are optimized for adjacent signal rejection vs.
signal to
noise ratio? I think I read that somewhere. Can anyone explain this to
me?
Thanks.
Jeff Frank
(KX2P)
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
________________________________________________________________________
AOL now offers free email to everyone. Find out more about what's free
from AOL at AOL.com.
|