, and the
problem goes away. Use PBT,even and put W1AW off the filter skirts.
Cortland
KA5S
[Original Message]
From: Rik van Riel r...@surriel.com
To: linux...@yahoogroups.com; digitalradio@yahoogroups.com
Date: 9/22/2009 12:08:22 AM
Subject: [digitalradio] An open letter: W1AW and 80m psk31
? - Stop by at
HamRadioNet.Org !
http://www.hamradionet.org
- Original Message -
From: Rik van Riel
To: linux...@yahoogroups.com ; digitalradio@yahoogroups.com
Sent: Monday, September 21, 2009 11:07 PM
Subject: [digitalradio] An open letter: W1AW and 80m psk31 interference
Cortland Richmond wrote:
Sound card users' preference for bandwidth wide enough to receive fifty or
more signals is what makes us vulnerable. W1AW does NOT wipe out the 80m
psk31 sub-band; its CW signal occupies perhaps 50-100 Hz. Use a narrow
filter, and a front-end able to handle nearby
Charles Brabham wrote:
There are no Considerate Operators associated with the ARRL, at least
not at ARRL HQ. - They apparently do not read and understand their own
publications.
W1AW has QSY'd before. For example, their 160m frequency
was changed from 1817.5 to 1802.5 kHz earlier this
Rik van Riel wrote:
Due to an unfortunate coincidence, W1AW's CW broadcasts pretty
much wipe out the 80m psk31 sub-band for a significant fraction
of the time.
I have received a reply from W1AW, which I have posted
on my web page:
http://surriel.com/radio/w1aw-psk-interference#comment-240
Hi, Rik.
Then use a 250 or 500 Hz BW pass band filter. Engage the notch filter. Get
an MFJ 1026 and null him out. Use a separately rotatable loop antenna for
receive. There are a number of things which will work, either by
themselves, or together.
We have or can get filters and other tools.
Due to an unfortunate coincidence, W1AW's CW broadcasts pretty
much wipe out the 80m psk31 sub-band for a significant fraction
of the time. To try and address this, I have sent the following
open letter to W1AW at the ARRL, and also published it on my web
site:
