[UK-CONTEST] RFI-ADSL Modem

[Les Allwood]

Hi All

I encountered a similar problem with my wireless router, a D-Link DSL-604+. 
It had worked fine for several years, but then developed an aversion to any 
transmitted signal on 80m towards the end of last year.

Like everybody else, I tried ferrite rings, disconnecting other equipment 
(Sky+ box, cordless telephone base, etc) and using different telephone 
sockets, without success.

Then, in a moment of inspiration, I remembered that BT had fitted an 
external extension lead from the main box to an upstairs bedroom way back in 
the 80s. I'm guessing that the exposed cabling had deteriorated over the 
years, as it was extremely noisy when I plugged a phone into it. As it was 
un-used in these days of cordless phones, I ripped out the wiring and, as if 
by magic, the router problem disappeared. I had already disposed of the old 
cable, so was unable to measure it, but I suspect that its length was 
somehow acting as an 80m antenna.

Maybe this will give somebody a clue if their installation has a critical 
length of wire within.

Good luck.

73 de Les, G3VQO

----- Original Message ----- 
From: "Bob Harrison" <g4ujs at qsl.net>
To: <uk-contest at contesting.com>
Sent: Tuesday, May 29, 2007 8:24 AM
Subject: [UK-CONTEST] RFI-ADSL Modem


> Hi All,
>
> I have a problem with an ADSL Modem.... its the LinkSys AM-300 ADSL2+
> Ethernet Modem.
>
> It doesn't like QRO 80m......drops the sync immediately.
>
> I am sure others have had similar probs with RF and ADSL.
>
> I have tried ferrite on telephone line and DC connector.
>
> Suggestions please
>
> Regards
>
> Bob Harrison
>
> Telephone: +44 7876 791215
>
> Website: http://www.qsl.net/g4ujs
>
> _______________________________________________
> UK-Contest mailing list
> UK-Contest at contesting.com
> http://lists.contesting.com/mailman/listinfo/uk-contest
>