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From: "flo" <hellozerohellozero@hotmail.com>
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Date: Thu, 27 Nov 2008 16:44:50 +0800
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Subject: Re: LF: ADSL
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Sounds good Mike - Ive managed to mitigate DSL and other  internal to abode 
SMSPU  noise that was making its way up the coax towards the antennae before 
but that's been in concrete/brick with metal framed building where I could 
dump all the noise from the internal side of the property by connecting the 
coax to the frame of the building. -this isnt possible here given the 
typical frame build thou. - I have thoughts of getting at the frame 
reinforcing but that doesn't extend very far up the house...

Another MOooose visit today trying to get at the bird feed for the 
Chickadees...

Laurence
KL 1 X Wasilla

--------------------------------------------------
From: "Mike-WE0H" <we0h@yahoo.com>
Sent: Thursday, November 27, 2008 3:39 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: ADSL

> I have my DSL modem connected within a couple feet of where the Telco line 
> comes in the house. I run a dedicated Telco line from the outside box to 
> the inside box then to the modem. The house Telco wiring is filtered 
> outside in the Telco box. That stopped all DSL noise here.
>
> Mike
> WE0H
> /16
>
>
> flo wrote:
>> Ive been playing at noise mitigation here at WE2 X PQ Wasilla Alaska and 
>> Im pretty happy Ive got 137kHz down to a finite level where I cant really 
>> mitigate it any further - the noise level is effectively S3 per se and 
>> the contributed by sideband noise from Loran and other on air qrm/n. 
>> Sideband noise from Loran is plainly audible.
>>  500 kHz has been another matter - The meter sits at S5 or so on SSB in 
>> 2.8kHz BW - The noise is proven to be from my ADSL *ITU G.992.3* feed 
>> from my local Telco - My feed is from an underground (UG) feed then a 
>> twisted pair into the house (of wooden frame construction) then into a 
>> distributed UTP star and seried connections to RJ connections around the 
>> house including my ADSL modem.
>>  The noise bandwidth appears around 150kHz up to 1 MHz which would appear 
>> to be the "downlink' towards me power bandwidth.
>>  The fix isnt pretty but its to limit the length of the ADSL feed before 
>> it meets an ADSL filter or filters - in my case this is to site the ADSL 
>> modem close to where it comes out of the ground then place the modem 
>> there and then filter the RF out and only feed the audio to 4kHz round 
>> the house. I put a wireless Linksys at the same location of the ADSL 
>> modem  - filtering the heck out of power as we go - so all office comms 
>> are via wireless.
>>  Ill let you know how it goes but initial indications are by effectively 
>> shortening the ADSL "antennae" - that the my noise level has dropped to 
>> S2 and this isnt ADSL white noise - I cant distinguish any pattern to the 
>> noise so presume its dispersed by coding.
>>  ps Im limited to 512 K down so this is a pretty expensive and slowish 
>> ADSL connection for those who live in the "boonies" -
>>  So if you have a "Whiteish noise" view of 500 kHz or MF and you have 
>> some negative influence from ADSL.
>>  Laurence KL1 X
>>
>
>
>