[UK-CONTEST] RFI-ADSL Modem

[Bob Harrison]

Thanks Lee...... it looks like I may have cured it...... it does seem that 
it is getting in on power cord. (15v DC) I wonder if it will be happy on a 
shack supply at 13.8v

Anyway at the moment  it looks OK, but I have a huge HUGE amount of ferrite 
on the power lead right at the back of the modem.

5 small tube rings and 2 clip ons!

Regards

Bob
----- Original Message ----- 
From: "Les Allwood" <g3vqo at mapleleaf.plus.com>
To: <>
Sent: Tuesday, May 29, 2007 9:51 AM
Subject: Re: [UK-CONTEST] RFI-ADSL Modem


> 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
>>
>> _______________________________________________
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>> UK-Contest at contesting.com
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>>
>
>
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