[UK-CONTEST] RFI-ADSL Modem

[Bob Harrison]

I meant thanks Les of course!

73 Bob

----- Original Message ----- 
From: "Bob Harrison" <g4ujs at qsl.net>
To: <>
Sent: Tuesday, May 29, 2007 10:50 AM
Subject: Re: [UK-CONTEST] RFI-ADSL Modem


> 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
>>>
>>> _______________________________________________
>>> UK-Contest mailing list
>>> UK-Contest at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/uk-contest
>>>
>>
>>
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>