I've had a network running for a couple of years using these HomePlug 
devices as well has Cat5 and wireless. Recently the computer in the Garage 
was unable to connect to the network. I swopped devices about but have been 
unable to get this computer to connect. This week the computer in one of the 
bedrooms has shown the same fault. After some more testing it seems that 
computers on the same mains ring as the device connect to the router can 
connect to the network, but devices on any other ring can't. There has been 
no work done on the electrics recently.
Any ideas as to what's going on and how to fix it?

TIA

Iain

Are you running some version of Windows, maybe some update has altered 
some settings somewhere.

I've not used homeplugs but to the best of my knowledge the computer 
sees it as an ethernet cable connection.

How many have you got, I'm assuming you have tried substituting devices.

Geoff Lane


Swarfmaker wrote:
> I've had a network running for a couple of years using these HomePlug 
> devices as well has Cat5 and wireless. Recently the computer in the Garage 
> was unable to connect to the network. I swopped devices about but have been 
> unable to get this computer to connect. This week the computer in one of the 
> bedrooms has shown the same fault. After some more testing it seems that 
> computers on the same mains ring as the device connect to the router can 
> connect to the network, but devices on any other ring can't. There has been 
> no work done on the electrics recently.
> Any ideas as to what's going on and how to fix it?
> 
> TIA
> 
> Iain 
> 
>

In article <hca6r5$gqh$1@news.eternal-september.org>, Swarfmaker says...
> 
> I've had a network running for a couple of years using these HomePlug 
> devices as well has Cat5 and wireless. Recently the computer in the Garage 
> was unable to connect to the network. I swopped devices about but have been 
> unable to get this computer to connect. This week the computer in one of the 
> bedrooms has shown the same fault. After some more testing it seems that 
> computers on the same mains ring as the device connect to the router can 
> connect to the network, but devices on any other ring can't. There has been 
> no work done on the electrics recently.
> Any ideas as to what's going on and how to fix it?
> 
Hopefully some pissed off Radio Ham is pointing a beam at your house and 
blasting 400 watts of SSB at it.


-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

That's what I would also do. I'd check the homeplugs somehow. Is there
any chance to borrow a spare from a friend and check it out?

--

NetPros Community
http://netpros.freeforums.org

On 29 Ïêô, 00:02, Geoff Lane  wrote:
> Are you running some version of Windows, maybe some update has altered
> some settings somewhere.
>
> I've not used homeplugs but to the best of my knowledge the computer
> sees it as an ethernet cable connection.
>
> How many have you got, I'm assuming you have tried substituting devices.
>
> Geoff Lane
>
>
>
> Swarfmaker wrote:
> > I've had a network running for a couple of years using these HomePlug
> > devices as well has Cat5 and wireless. Recently the computer in the Garage
> > was unable to connect to the network. I swopped devices about but have been
> > unable to get this computer to connect. This week the computer in one of the
> > bedrooms has shown the same fault. After some more testing it seems that
> > computers on the same mains ring as the device connect to the router can
> > connect to the network, but devices on any other ring can't. There has been
> > no work done on the electrics recently.
> > Any ideas as to what's going on and how to fix it?
>
> > TIA
>
> > Iain- Áðüêñõøç êåéìÝíïõ óå ðáñÜèåóç -
>
> - ÅìöÜíéóç êåéìÝíïõ óå ðáñÜèåóç -

Swarfmaker wrote:
> I've had a network running for a couple of years using these HomePlug 
> devices as well has Cat5 and wireless. Recently the computer in the Garage 
> was unable to connect to the network. I swopped devices about but have been 
> unable to get this computer to connect. This week the computer in one of the 
> bedrooms has shown the same fault. After some more testing it seems that 
> computers on the same mains ring as the device connect to the router can 
> connect to the network, but devices on any other ring can't. There has been 
> no work done on the electrics recently.
> Any ideas as to what's going on and how to fix it?
> 
> TIA
> 
> Iain 
> 
> 
If you have the network ID set at default, ie HomePlug, then someone may 
be using one somewhere else near you and your networks are conflicting.

Set your network ID to something unique with the config app that 
normally comes with them.  That will clear it.

Rob.

Conor wrote:

> Hopefully some pissed off Radio Ham is pointing a beam at your house and 
> blasting 400 watts of SSB at it.

Conor,

I've seen you have a rant about these devices before so out of curiosity 
how far away from a ring main can it effect Ham's transmissions.

Geoff Lane

Geoff Lane wrote:
> Are you running some version of Windows, maybe some update has altered
> some settings somewhere.
>
> I've not used homeplugs but to the best of my knowledge the computer
> sees it as an ethernet cable connection.
>
> How many have you got, I'm assuming you have tried substituting
> devices.
> Geoff Lane
I've tried substituting devices. All of the devices will work quite happily 
when on the same circuit. i.e. the downstairs mains ring.
The problem only occurs when I have devices on seperate rings. i.e. upstairs 
and downstairs or garage

geoar75@gmail.com wrote:
> That's what I would also do. I'd check the homeplugs somehow. Is there
> any chance to borrow a spare from a friend and check it out?
>
Any mixture of devices will work whilst on the one ring. Problem only when 
some devices on another ring

Conor wrote:
> In article <hca6r5$gqh$1@news.eternal-september.org>, Swarfmaker
> says...
>>
>> I've had a network running for a couple of years using these HomePlug
>> devices as well has Cat5 and wireless. Recently the computer in the
>> Garage was unable to connect to the network. I swopped devices about
>> but have been unable to get this computer to connect. This week the
>> computer in one of the bedrooms has shown the same fault. After some
>> more testing it seems that computers on the same mains ring as the
>> device connect to the router can connect to the network, but devices
>> on any other ring can't. There has been no work done on the
>> electrics recently.
>> Any ideas as to what's going on and how to fix it?
>>
> Hopefully some pissed off Radio Ham is pointing a beam at your house
> and blasting 400 watts of SSB at it.

Thank you for your insightful response Conor. As the saying goes, your 
advice is worth exactly what I paid for it.
If you can't say anything useful then JSTFU

In article <hccjkh$s4r$1@news.datemas.de>, Geoff Lane says...

> I've seen you have a rant about these devices before so out of curiosity 
> how far away from a ring main can it effect Ham's transmissions.
> 
I live 150 metres with a row of houses between me and the one that 
affected me. Quite a strong signal - enough to blank out anyone who was 
more than a couple of miles away.

Got another one about the same distance in the other direction but it 
seems to be quite low level so although its there, I can live with it.

Reports have shown up to 500 feet AFAIR (could be metres but they're all 
old gits so its probably in english).


-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

In article <hccju5$gur$1@news.eternal-september.org>, Swarfmaker says...

> Thank you for your insightful response Conor. As the saying goes, your 
> advice is worth exactly what I paid for it.
> If you can't say anything useful then JSTFU 

Homeplug networks turn your ring mains into an aerial that broadcasts 
the signal several hundred feet or didn't you know that?


-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

On Thu, 29 Oct 2009 17:45:10 -0000, Conor  wrote:

>In article <hccju5$gur$1@news.eternal-september.org>, Swarfmaker says...
>
>> Thank you for your insightful response Conor. As the saying goes, your 
>> advice is worth exactly what I paid for it.
>> If you can't say anything useful then JSTFU 
>
>Homeplug networks turn your ring mains into an aerial that broadcasts 
>the signal several hundred feet or didn't you know that?

If you say so.

I got mine from http://www.solwise.co.uk/ who still seem to be selling
them and I can't see any disclaimers there.

So I'll carry on using mine.

-- 
vic

Conor wrote:
> In article <hccju5$gur$1@news.eternal-september.org>, Swarfmaker
> says...
>
>> Thank you for your insightful response Conor. As the saying goes,
>> your advice is worth exactly what I paid for it.
>> If you can't say anything useful then JSTFU
>
> Homeplug networks turn your ring mains into an aerial that broadcasts
> the signal several hundred feet or didn't you know that?

Conor, can you point to something in my initial post that suggests that I 
needed information about the radiation characteristics of these devices? NO! 
I don't believe you can.
Now, if you can answer my query, I'm all ears. If you can't answer my query 
then I'm not realy interested in anything you have to say. As far as I am 
aware these devices have passed all the relevant tests and are suitably CE 
marked.

Iain

In article , Victor Meldrew 
says...

> I got mine from http://www.solwise.co.uk/ who still seem to be selling
> them and I can't see any disclaimers there.
> 
They're hardly likely to broadcast the fact they're causing illegal 
interference.

> So I'll carry on using mine.

Please carry on. I'm quite sure there'll be someone in your area happy 
to listen in.


-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

On Thu, 29 Oct 2009 19:53:59 -0000, Conor  wrote:

>In article , Victor Meldrew 
>says...
>
>> I got mine from http://www.solwise.co.uk/ who still seem to be selling
>> them and I can't see any disclaimers there.
>> 
>They're hardly likely to broadcast the fact they're causing illegal 
>interference.

If it was illegal solwise would no be selling them.

-- 
vic

On Thu, 29 Oct 2009 19:53:59 -0000, Conor  wrote:

>In article , Victor Meldrew 
>says...
>
>> I got mine from http://www.solwise.co.uk/ who still seem to be selling
>> them and I can't see any disclaimers there.
>> 
>They're hardly likely to broadcast the fact they're causing illegal 
>interference.
>
>> So I'll carry on using mine.
>
>Please carry on. I'm quite sure there'll be someone in your area happy 
>to listen in.

I nearly missed this piece of stupid paranoia.

Black Hats are all around us are they ?

-- 
vic

In article , Victor Meldrew 
says...

> If it was illegal solwise would no be selling them.

BWAHAHA. How naive you are.

-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

Swarfmaker wrote:
> Conor wrote:
>> In article <hccju5$gur$1@news.eternal-september.org>, Swarfmaker
>> says...
>>
>>> Thank you for your insightful response Conor. As the saying goes,
>>> your advice is worth exactly what I paid for it.
>>> If you can't say anything useful then JSTFU
>> Homeplug networks turn your ring mains into an aerial that broadcasts
>> the signal several hundred feet or didn't you know that?
> 
> Conor, can you point to something in my initial post that suggests that I 
> needed information about the radiation characteristics of these devices? NO! 
> I don't believe you can.
> Now, if you can answer my query, I'm all ears. If you can't answer my query 
> then I'm not realy interested in anything you have to say. As far as I am 
> aware these devices have passed all the relevant tests and are suitably CE 
> marked.
> 

 From what I've read (mainly coming from the stuff Conor has posted 
before) the whole CE marking may not necessarily be indicative of the 
actual product you have in your hands, depending on whose viewpoint you 
look at it from. I know it doesn't give the answer to your issue but 
some of it certainly makes interesting reading, for example:

http://www.theregister.co.uk/2009/10/01/rsgb_ofcom

Feel free to be ignorant by all means, if you don't care I'm not going 
to argue.

-- 
[ste]

Swarfmaker wrote:

>  As far as I am 
> aware these devices have passed all the relevant tests and are suitably CE 
> marked.

Trouble is Radio Hams are probably in a minority so the effect may not 
have been immediately obvious.

The motor industry is a typical example of denial of a problem and then 
when forced a recall is issued.

It might be a problem but I am sure if it IS illegal then eventually 
something will happen.

Geoff Lane

In article <hchfm5$qjb$1@news.datemas.de>, Geoff Lane says...

> It might be a problem but I am sure if it IS illegal then eventually 
> something will happen.
> 
Sweden have already banned them this week.


-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

Conor wrote:
> In article <hchfm5$qjb$1@news.datemas.de>, Geoff Lane says...
> 
>> It might be a problem but I am sure if it IS illegal then eventually 
>> something will happen.
>>
> Sweden have already banned them this week.

When you say 'banned' is that further sales of existing devices may not 
now be used.

Geoff Lane

On Sun, 01 Nov 2009 22:26:32 +0000
Geoff Lane  wrote:

> Conor wrote:
> > In article <hchfm5$qjb$1@news.datemas.de>, Geoff Lane says...
> > 
> >> It might be a problem but I am sure if it IS illegal then
> >> eventually something will happen.
> >>
> > Sweden have already banned them this week.
> 
> When you say 'banned' is that further sales of existing devices may
> not now be used.
> 
"Withdrawn from the market"

"Rob Morley"  wrote in message 
news:20091102033605.61317e85@bluemoon...
> On Sun, 01 Nov 2009 22:26:32 +0000
> Geoff Lane  wrote:
>
>> Conor wrote:
>> > In article <hchfm5$qjb$1@news.datemas.de>, Geoff Lane says...
>> >
>> >> It might be a problem but I am sure if it IS illegal then
>> >> eventually something will happen.
>> >>
>> > Sweden have already banned them this week.
>>
>> When you say 'banned' is that further sales of existing devices may
>> not now be used.
>>
> "Withdrawn from the market"
>

those Swede's always do pull out early...

Swarfmaker wrote:
> I've had a network running for a couple of years using these HomePlug 
> devices as well has Cat5 and wireless. Recently the computer in the Garage 
> was unable to connect to the network. I swopped devices about but have been 
> unable to get this computer to connect. This week the computer in one of the 
> bedrooms has shown the same fault. After some more testing it seems that 
> computers on the same mains ring as the device connect to the router can 
> connect to the network, but devices on any other ring can't. There has been 
> no work done on the electrics recently.
> Any ideas as to what's going on and how to fix it?
> 
> TIA
> 
> Iain 
> 
> 

I note you said there had been no work done on the electrics supply, but have 
you by chance added any sort of multi-way adapter for 13 A sockets, which 
includes a filter?


I do not know much about these HomePlug devices, but if they use the mains 
wiring, their efficiency might be reduced if there is a lot of capacitance 
across the wiring. A filter would add some capacitance. The adapter could cause 
you issues, even if there are no devices at all plugged into it.

I've never used these things myself. The place where I want to get ethernet is 
in my garage, and that is on another phase, of the 3-phase supply to my house. I 
doubt these things work on 3-phase supplies, where the two computers are on 
different phases, though I do not know if that is true.

Dave

On Wed, 04 Nov 2009 22:16:03 +0000, Dave wrote:

[...]

> I've never used these things myself. The place where I want to get
> ethernet is in my garage, and that is on another phase, of the 3-phase
> supply to my house. I doubt these things work on 3-phase supplies, where
> the two computers are on different phases, though I do not know if that
> is true.
> 
> Dave

They don't work if connected to different phases. They also don't work if 
the signal has to pass through a meter, so sharing a connection with a 
neighbour is not possible.

There is a fair bit of degradation when the signal passes through a 
consumer unit to a different ring main on the same phase, although the 
degree of signal loss seems variable.

Chris

-- 
Remove prejudice to reply.

"Chris Whelan"  wrote in message 
news:DfwIm.4930$uf7.2920@newsfe12.ams2...
> On Wed, 04 Nov 2009 22:16:03 +0000, Dave wrote:
>
> [...]
>
>> I've never used these things myself. The place where I want to get
>> ethernet is in my garage, and that is on another phase, of the 3-phase
>> supply to my house. I doubt these things work on 3-phase supplies, where
>> the two computers are on different phases, though I do not know if that
>> is true.
>>
>> Dave
>
> They don't work if connected to different phases. They also don't work if
> the signal has to pass through a meter, so sharing a connection with a
> neighbour is not possible.
>
> There is a fair bit of degradation when the signal passes through a
> consumer unit to a different ring main on the same phase, although the
> degree of signal loss seems variable.

When you say "consumer unit" do you mean "fuse box or circuit breaker box"?

I can vouch for them not working on different phases. Where I used to work, 
different benches in the lab were on different mains phases (not sure why!) 
and when we were testing homeplug devices to get experience of them before 
fitting them at customer sites, we found that we could sometimes get 
excellent communication and sometimes we got nothing. Then someone noticed 
that it depended which benches the devices were plugged into... ;-)

The different mains phases on different benches was a pain in the arse 
because we weren't allowed to connect equipment from different benches (eg 
by Ethernet, or monitor on one bench to PC on adjacent bench) unless we used 
an isolator. If they *had* to use different phases to spread the load, it 
would have been better if they had at least used the same phases for all the 
benches at one end of the lab so at least some benches were "compatible", 
rather than having every single bench on a different phase to its two 
neighbours. Someone didn't think that one through at all. Unfortunately by 
the time we moved back in after the refurbishment of the floor, it was a 
done deal and couldn't be changed :-(

On Thu, 05 Nov 2009 09:13:45 +0000, Martin wrote:

> "Chris Whelan"  wrote in message
> news:DfwIm.4930$uf7.2920@newsfe12.ams2...
>> On Wed, 04 Nov 2009 22:16:03 +0000, Dave wrote:
>>
>> [...]
>>
>>> I've never used these things myself. The place where I want to get
>>> ethernet is in my garage, and that is on another phase, of the 3-phase
>>> supply to my house. I doubt these things work on 3-phase supplies,
>>> where the two computers are on different phases, though I do not know
>>> if that is true.
>>>
>>> Dave
>>
>> They don't work if connected to different phases. They also don't work
>> if the signal has to pass through a meter, so sharing a connection with
>> a neighbour is not possible.
>>
>> There is a fair bit of degradation when the signal passes through a
>> consumer unit to a different ring main on the same phase, although the
>> degree of signal loss seems variable.
> 
> When you say "consumer unit" do you mean "fuse box or circuit breaker
> box"?

No, I mean a consumer unit:

http://en.wikipedia.org/wiki/Consumer_unit

This may well contain elements of the devices you mention, as well as 
others.

> I can vouch for them not working on different phases. Where I used to
> work, different benches in the lab were on different mains phases (not
> sure why!) and when we were testing homeplug devices to get experience
> of them before fitting them at customer sites, we found that we could
> sometimes get excellent communication and sometimes we got nothing. Then
> someone noticed that it depended which benches the devices were plugged
> into... ;-)
> 
> The different mains phases on different benches was a pain in the arse
> because we weren't allowed to connect equipment from different benches
> (eg by Ethernet, or monitor on one bench to PC on adjacent bench) unless
> we used an isolator. If they *had* to use different phases to spread the
> load, it would have been better if they had at least used the same
> phases for all the benches at one end of the lab so at least some
> benches were "compatible", rather than having every single bench on a
> different phase to its two neighbours. Someone didn't think that one
> through at all. Unfortunately by the time we moved back in after the
> refurbishment of the floor, it was a done deal and couldn't be changed
> :-(

It is unlikely that the installation would have met the requirements of 
IEE regs or BS7671.

Chris

-- 
Remove prejudice to reply.

"Chris Whelan"  wrote in message 
news:i1xIm.43846$1i2.7209@newsfe07.ams2...
> On Thu, 05 Nov 2009 09:13:45 +0000, Martin wrote:
>
>> "Chris Whelan"  wrote in message
>> news:DfwIm.4930$uf7.2920@newsfe12.ams2...
>>> On Wed, 04 Nov 2009 22:16:03 +0000, Dave wrote:
>>>
>>> [...]
>>>
>>>> I've never used these things myself. The place where I want to get
>>>> ethernet is in my garage, and that is on another phase, of the 3-phase
>>>> supply to my house. I doubt these things work on 3-phase supplies,
>>>> where the two computers are on different phases, though I do not know
>>>> if that is true.
>>>>
>>>> Dave
>>>
>>> They don't work if connected to different phases. They also don't work
>>> if the signal has to pass through a meter, so sharing a connection with
>>> a neighbour is not possible.
>>>
>>> There is a fair bit of degradation when the signal passes through a
>>> consumer unit to a different ring main on the same phase, although the
>>> degree of signal loss seems variable.
>>
>> When you say "consumer unit" do you mean "fuse box or circuit breaker
>> box"?
>
> No, I mean a consumer unit:
>
> http://en.wikipedia.org/wiki/Consumer_unit
>
> This may well contain elements of the devices you mention, as well as
> others.

Ah. I've not heard the term before. So is it the RCDs, with their sensing of 
out-of-balance currents, which tend to attenuate Homeplug signals? Is an 
old-fashioned fuse box less likely to do this?

>> The different mains phases on different benches was a pain in the arse
>> because we weren't allowed to connect equipment from different benches
>> (eg by Ethernet, or monitor on one bench to PC on adjacent bench) unless
>> we used an isolator. If they *had* to use different phases to spread the
>> load, it would have been better if they had at least used the same
>> phases for all the benches at one end of the lab so at least some
>> benches were "compatible", rather than having every single bench on a
>> different phase to its two neighbours. Someone didn't think that one
>> through at all. Unfortunately by the time we moved back in after the
>> refurbishment of the floor, it was a done deal and couldn't be changed
>> :-(
>
> It is unlikely that the installation would have met the requirements of
> IEE regs or BS7671.

What in particular do the regs prohibit about this? Is it the fact that the 
proximity of sockets on different phases allows equipment from different 
phases to be sited closely enough together to be connected?

I thought it seemed a very odd way of wiring up the benches. After all, it 
was only a few computers (PCs and servers) - maybe 10 or 20 per bench. I'd 
have thought that one 30 A ring main could have powered each bench, with the 
whole room on one phase from separate ring mains. Makes you wonder where 
else the problem existed - could adjacent desks in the office area have been 
on different phases, with the possibility that equipment from two phases may 
have been connected together temporarily during testing/development work?

On Thu, 05 Nov 2009 12:26:43 +0000, Martin wrote:

[...]

> Ah. I've not heard the term before. So is it the RCDs, with their
> sensing of out-of-balance currents, which tend to attenuate Homeplug
> signals?

No idea, but I've certainly had reductions in data rate when connecting 
Homeplugs on different rings from the same CU. There were no RCD's 
involved in that particular situation.

> Is an old-fashioned fuse box less likely to do this?

<pedant>

I'm an old-fashioned (retired) electrical technician; the term "fuse box" 
is not used in the industry.

In a domestic or small commercial property, the thing you are wanting to 
call a fuse box has always been a consumer unit. In larger commercial, 
and industrial premises a distribution bard would be used.

</>

>>> The different mains phases on different benches was a pain in the arse
>>> because we weren't allowed to connect equipment from different benches
>>> (eg by Ethernet, or monitor on one bench to PC on adjacent bench)
>>> unless we used an isolator. If they *had* to use different phases to
>>> spread the load, it would have been better if they had at least used
>>> the same phases for all the benches at one end of the lab so at least
>>> some benches were "compatible", rather than having every single bench
>>> on a different phase to its two neighbours. Someone didn't think that
>>> one through at all. Unfortunately by the time we moved back in after
>>> the refurbishment of the floor, it was a done deal and couldn't be
>>> changed :-(
>>
>> It is unlikely that the installation would have met the requirements of
>> IEE regs or BS7671.
> 
> What in particular do the regs prohibit about this? Is it the fact that
> the proximity of sockets on different phases allows equipment from
> different phases to be sited closely enough together to be connected?

Yes.

Chris

-- 
Remove prejudice to reply.

"Chris Whelan"  wrote in message 
news:7cBIm.84883$zt3.20505@newsfe03.ams2...
> On Thu, 05 Nov 2009 12:26:43 +0000, Martin wrote:
>
> [...]
>
>> Ah. I've not heard the term before. So is it the RCDs, with their
>> sensing of out-of-balance currents, which tend to attenuate Homeplug
>> signals?
>
> No idea, but I've certainly had reductions in data rate when connecting
> Homeplugs on different rings from the same CU. There were no RCD's
> involved in that particular situation.
>
>> Is an old-fashioned fuse box less likely to do this?
>
> <pedant>
>
> I'm an old-fashioned (retired) electrical technician; the term "fuse box"
> is not used in the industry.
>
> In a domestic or small commercial property, the thing you are wanting to
> call a fuse box has always been a consumer unit. In larger commercial,
> and industrial premises a distribution bard would be used.
>
> </>

Sorry. I was using the term that the layman uses for it. Plenty of people 
talk about "turning off the electricity at the fuse box" (even when the 
"fuses" are MCBs!) but I've never heard anyone call it a consumer unit. 
Maybe it's a term that's only used in the electrician industry and not by 
the layman - like light bulbs are referred to as lamps. Anyway, I'll try to 
use the term consumer unit from now on - and hope that people know what I'm 
referring to!

>>> It is unlikely that the installation would have met the requirements of
>>> IEE regs or BS7671.
>>
>> What in particular do the regs prohibit about this? Is it the fact that
>> the proximity of sockets on different phases allows equipment from
>> different phases to be sited closely enough together to be connected?
>
>Yes.

I wish I'd known about this at the time (1997). It could have been used as 
ammunition to get the site facilities people (or their contractors) to 
rewire the benches so they were not each on a separate phase. As it is, we 
had to live with the restrictions, which were displayed on big signs "do not 
connect equipment from adjacent benches".

The irony is that six months after we were all turfed out into a portacabin 
while the lab and desk space were given an expensive refurbishment, they 
went and made the lot of us redundant ;-)

http://www.ispreview.co.uk/news/EkFkpkyAZEyeTlmeFJ.html



"Swarfmaker"  wrote in message 
news:hca6r5$gqh$1@news.eternal-september.org...
> I've had a network running for a couple of years using these HomePlug 
> devices as well has Cat5 and wireless. Recently the computer in the Garage 
> was unable to connect to the network. I swopped devices about but have 
> been unable to get this computer to connect. This week the computer in one 
> of the bedrooms has shown the same fault. After some more testing it seems 
> that computers on the same mains ring as the device connect to the router 
> can connect to the network, but devices on any other ring can't. There has 
> been no work done on the electrics recently.
> Any ideas as to what's going on and how to fix it?
>
> TIA
>
> Iain
>

"Conor"  wrote in message 
news:MPG.2552dea19736c1d9898b6@news.eternal-september.org...
> In article <hca6r5$gqh$1@news.eternal-september.org>, Swarfmaker says...
>>
>> I've had a network running for a couple of years using these HomePlug
>> devices as well has Cat5 and wireless. Recently the computer in the 
>> Garage
>> was unable to connect to the network. I swopped devices about but have 
>> been
>> unable to get this computer to connect. This week the computer in one of 
>> the
>> bedrooms has shown the same fault. After some more testing it seems that
>> computers on the same mains ring as the device connect to the router can
>> connect to the network, but devices on any other ring can't. There has 
>> been
>> no work done on the electrics recently.
>> Any ideas as to what's going on and how to fix it?
>>
> Hopefully some pissed off Radio Ham is pointing a beam at your house and
> blasting 400 watts of SSB at it.
>
>
Go away you foul mouthed silly little man.
Your input to a number of groups is not welcome.  Neither is your foul 
language
in some groups.
Good job you will never get a licence, no one would speak to you.
You never did say what your registered company number or vat number is.
Companies House has no trace of you, so I passed on the info to a friend
working at HMRC!

"Geoff Lane"  wrote in message 
news:hccjkh$s4r$1@news.datemas.de...
> Conor wrote:
>
>> Hopefully some pissed off Radio Ham is pointing a beam at your house and 
>> blasting 400 watts of SSB at it.
>
> Conor,
>
> I've seen you have a rant about these devices before so out of curiosity 
> how far away from a ring main can it effect Ham's transmissions.
>
> Geoff Lane
>

He doesn't have a valid UK amateur licence, what he repeats is what he heard
others say.  That is why he can't give you any technical explanation!
PLT as it is known uses a number of frequencies to transmit data over mains
wiring.  This also radiates for a few hundred feet and can travel some 
distance
along a street.  OFCOM should say they are illegal as they can cause 
problems
with MW radio.  You can imagine if you put a MW/SW radio on, it would
cause a data type noise on various frequencies and harmonics.  People think
incorrectly that the interference in HF radios is via the mains cable.  The 
testing
I did showed that the transformer stopped the interference, it was coming in
via the aerials.  Using a magnetic loop eliminated the interference.
It shouldn't be down to us licensed amateurs to stop incoming interference,
OFCOM should appy the Law to retailers, similar to how they prosecute
people building pirate equipment for example.  PLT devices are illegal to
sell and operate under UK Law, OFCOM refuses to act, I wonder why!
Fortunately a decent matching device on the aerial works wonders when
combined with DSP.  So PLT doesn't affect me too much despite the
neighbours using the devices.
I often find computers in unshielded cases cause more problems on HF
than PLT devices!  people often confuse PLT noise with computer noise and
once they use a computer by their own radios they soon have problems if
they have no knowledge of EMC.  Knowledge of EMC has now been lost
with the downgrading of the requirement for giveaway licences such as
the novice scheme.  Nothing like it used to be with two C&G exams and
a morse test at 12 words per minute to operate on HF.
It is clear that standards have dropped from some of the posts about.
Lots of people who class themselves as "technical" but haven't a clue
when they are asked to explain what they look at on Google or see others
posting and just copy it.
Fortunately some of us are Class A amateurs and have a working
knowledge of radio engineering through years of work and designing
products for manufacturers such as Kenwood!  Also designing computer
related products that radio amateurs now use every day.

In article <hd9ris$8pe$1@news.albasani.net>, Roger says...
> 

> He doesn't have a valid UK amateur licence,

Err, I posted a scan of it on uk.r.a

> Fortunately some of us are Class A amateurs 

That "some" doesn't include you, Tiscali idiot.

-- 
Conor
www.notebooks-r-us.co.uk

I'm not prejudiced. I hate everybody equally.

"Roger"  wrote in message 
news:hd9ris$8pe$1@news.albasani.net...
> I did showed that the transformer stopped the interference, it was coming 
> in
> via the aerials.  Using a magnetic loop eliminated the interference.
> It shouldn't be down to us licensed amateurs to stop incoming 
> interference,
> OFCOM should appy the Law to retailers, similar to how they prosecute
> people building pirate equipment for example.  PLT devices are illegal to
> sell and operate under UK Law, OFCOM refuses to act, I wonder why!

I can understand the confusion: PLT devices have CE markings so there is a 
not unreasonable assumption that they are legal to use and that they "must" 
be OK to use without causing interference (otherwise why would they have 
been granted CE approval).

But from what Conor has said, it seems that some PLT devices do not conform 
because the instance of the device which is CE-tested is not the same as the 
modified one which is sold. I'm surprised that this isn't grounds for 
non-conforming devices to be banned from sale, with only conforming ones 
being allowed to be sold.

I hadn't realised that they caused MF interference (ie to domestic 
broadcasts received by civilians) as well as to HF (confined to radio 
amateurs and to specialised users and very long-distance broadcasts).

It's a bugger because there's no doubt that PLT devices are an excellent way 
to carry Ethernet across distances which wi-fi will not reach and where Cat 
5 cable is not practical or permitted (eg listed building).

It's a shame that there isn't an equivalent of PLT that doesn't cause RF 
interference.

On Mon, 9 Nov 2009 20:37:38 -0000
"Martin"  wrote:

> "Roger"  wrote in message 
> news:hd9ris$8pe$1@news.albasani.net...

<snip inaccurate grandiose bollocks>
> 
> I can understand the confusion:

Yes, Roger does his best to act like a human being, but he is actually
pond scum and should be treated as such.