Charles,
This might sound odd, but it seems to me that you could have a cable in
your modem system that just happens to be resonant on 10 meters. Multiple
beads might help; however, one way to find out is to either lengthen or
shorten one (or all) of the cables going to/from the modem. Coiling the
cables into a tight bundle might have a similar effect, as could winding
the cables around a large ferrite toroid or rod.
One question: what about operation on higher bands? Have you tried 6m or
2m at 100 watts, or more?
Best luck.
73, Dale
WA9ENA
"Charles Johnston" <ctj92@cableone.net>@contesting.com on 11/27/2001
01:58:34 PM
Sent by: rfi-admin@contesting.com
To: "RFI - SUBMIT" <rfi@contesting.com>
cc:
Subject: [RFI] USB cable modem and 10M
Hello list members,
My DCM-200 (D-Link) usb cable modem will stop working and go into a
resync cycle if I am on 10m phone with as little as 60w out pep. None of
the other HF bands affect the modem at all even with 800w pep output. I
had added a pair of clip on ferrites to the modem incoming coax (no
help) and also to the usb cable (no help). My station has a good earth
electrical ground with a common tie point which is also tied to the
service ac ground. As I mentioned this is only on 10m....
I have searched the RFI list archives but did not see anything
directly related to my situation. Any and all replies are very welcomed
at this time....
73 / DX
Charles T Johnston
Prescott, Arizona - U.S.A.
charles@ab7sl.com
AB7SL - Ham Radio Pages
Official W9INN Antennas Page
www.ab7sl.com
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