[RndTbl] Networking over home power lines

ve4drk@gmail.com catchall at keizer.ca
Tue Feb 14 12:43:44 CST 2012

I was in the middle of typing a reply that says basically the same thing --
I guess I'm not as fast at typing these days :-)

Basically, the same thing -- The biggest hing you need to look at is to
find out if the two end-points exist on the same side of the mains.  Is
this commercial or residential?  If it's down the road, then it may be on a
separate transformer as well.

Even from a residential perspective, you can have issues since you have two
lines coming into the house - you
may have one circuit on one side and another circuit on the other side --
the transmission may not go through/cross-over the remote transformers.
Similar issues arise from X10 usage as well ... different frequencies, but
similar issues.

Naturally, injecting the type of frequencies these use into the circuitry
of your house can also cause that same injection to show up unwanted on
devices that receive on those frequencies ... ie: radios and the like.
 Interference may show up.

I'm not an advocate of Ethernet-over-power, (I'm a ham radio operator and
these ethernet over power technologies spew RF everywhere) but would
certainly look more to a wireless scenario.


On 14 February 2012 12:34, Robert Keizer <robert at keizer.ca> wrote:

> My understanding is that a transformer will block that frequency. I
> had looked into it for a while and I read some people making block
> wide networks, but the at least in their situation the transformer at
> the end of the block was filtering.
> Keep the list updated, this is interesting stuff. :)
> Rob
> On Tue, Feb 14, 2012 at 11:48 AM, John Lange <john at johnlange.ca> wrote:
> > From the bit of reading I've done, it appears that a standard for
> > networking over power lines was ratified in September 2010.
> >
> > Linksys has a device (plek400) for about $100. What I can't seem to
> > find out is what the maximum theoretical distance the signal can
> > travel?
> >
> > I have a situation where I'd like to get a network drop into a
> > building that is 400m away. I've toyed with the idea of a home-brew
> > Wifi point-to-point system but it's still relatively expensive to buy
> > two Buffalo radios plus external antennas etc. and even then it would
> > be on the outside of the range for that type of solution.
> >
> > The building is defiantly on the same power "system" so can the
> > network-over-power devices reach 400m ?
> >
> > John
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