RE: OT Electronics guru

[<anthony.kirrane@xxxxxxxxxxxx>]

Thanks for your time David.  I will try that tonight.  I will also try to
purchase one of those transformers you mentioned.

Regards


Anthony


-----Original Message-----
From: Ward, David [mailto:DAvid.Ward@xxxxxxx]
Sent: 01 April 2004 11:47
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] OT Electronics guru


I've just spoken to a friend that had been looking into some X10 signals on
his scope

He found that a PC connected close to his X10 transceiver attenuated the
X10
signals substantially

Basically we think that the filters in the SMPSU that are present to
prevent
conducted noise from the PSU entering the mains circuit are also
attenuating
the X10 signals (which is after all just noise superimposed on the Mains)
Couple of things to try

Plug LCD in via a really long extension lead as far away from the X10
transmitter that you can
This should reduce the effect of the filters in the LCD PSU
A more permanent solution would be to use a 1:1 isolating transformer for
the LCD power, a non toroidal works best.  He was trying to get US 110VAC
X10 equipment running in the UK and found that a standard transformer would
block the X10 signals whereas a toroidal would allow some signal to pass.
He also passed don these couple of links

<http://www.smarthome.com/4836.html>
<http://www.smarthome.com/howto21.html>
<http://www.smarthome.com/solution18.html>
<http://www.smarthomemfg.com/manuals/1626web.pdf>
<http://www.smarthome.com/4836.html>



HTH

Dave

-----Original Message-----
From: anthony.kirrane@xxxxxxx [mailto:anthony.kirrane@xxxxxxx]
Sent: 01 April 2004 11:18
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] OT Electronics guru


It's built in.  It is a Dell badged 17" LCD.  I read another's comment
on this lists archives that Dell monitors are actually Sony if that matters
or
helps in anyway.

-----Original Message-----
From: Ward, David [mailto:DAvid.Ward@xxxxxxx]
Sent: 01 April 2004 10:38
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] OT Electronics guru


Anthony,

Does the screen have a separate PSU or is it built-in?
If separate, any chance you could try a replacement?
It sounds like a dodgy swichmode PSU

Dave



-----Original Message-----
From: Stuart Grimshaw [mailto:stuart@xxxxxxx]
Sent: 01 April 2004 11:30
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] OT Electronics guru


On Thu, Apr 01, 2004 at 10:12:59AM +0100, anthony.kirrane@xxxxxxx
wrote:
> Hi all
>
> As some of you may be aware my LCD screen is stopping all X10
communication
> in my home.  Well I am fairly certain it is the screen.  Everything
worked

> fine for about 12 months then all stopped working and erroneous
commands You could always try wrapping the power cord round a toroidal
magnet, that used to be a good method of removing interference caused by
radio equipment
back in the day...



UK Home Automation Meet 2004 - BOOK NOW!
http://www.ukha2004.com

http://www.automatedhome.co.uk

Member Offers - http://www.freeranger.co.uk/ukha