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Message-ID: <002801c7b16f$c0cf5d50$e043383e@Tom>
From: "Tom Boucher" <tom@telemetry.demon.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <002101c7b124$7d195660$0300a8c0@lark> <467629A5.11691.1814DB@dave.davesergeant.com>
Date: Mon, 18 Jun 2007 07:13:12 +0100
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Subject: Re: LF: Mike's  "ADSL problem"
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Dave

I have had ADSL filters and modems fail. Even a passive device will fail 
given a high enough level of static build-up on the lines - I guess it's a 
capacitor breaking down. After my third modem failure, I built my own 
phone-line protector box with some chunky transient suppressor VDRs.

73
Tom G3OLB

----- Original Message ----- 
From: "Dave Sergeant" <dave@davesergeant.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, June 18, 2007 6:43 AM
Subject: Re: LF: Mike's "ADSL problem"


> Alan, those sorts of problems are certainly due to dodgey switch mode
> psus in equipment and fairly common. You and Mike should be looking
> in that direction and not blaming ADSL. I would not expect problems
> from ADSL as it is a balanced system and should not radiate very far
> at all. You would only get any radiation if there is a dodgey
> telephone connection somewhere, say in the overhead lines, where the
> twin pairs have been accidentally split between two separate pairs so
> the two lines do not run parallel - very rare but has been known to
> happen. It most certainly will not be a dodgey ADSL filter as the
> broadband signal is not filtered at all in those, only the telephone
> side is filtered (and I doubt whether they ever fail despite all the
> suggestions to change them when you have a fault, as passive devices
> there is nothing inside them to fail...).
>
> So look very seriously at those smpsu's, wallwarts etc.
>
> 73 Dave G3YMC
>
> http://www.davesergeant.com
>
>