Re: X-10 friendly switchmode PS

[nobody@xxxxxxxxxxxx (Dave Houston)]

I'm afraid that knowing the switching frequency is of little use in
determining whether a particular supply will cause problems for X-10 &
Insteon.

While there have been many reports of "noisy" supplies, I doubt that noise
is really the problem. Only a few people have reported measuring noise with
any of the available X-10 signal strength meters.

The more common problem is a 0.1µF capacitor used as a line filter to
prevent noise from reaching the mains. There's no correlation with the
switching frequency.

And there have been many reports here of laptop supplies that caused X-10
problems.

"RoughRider" <Post@xxxxxxxxxxxxxxxxx> wrote:

>It would help if you knew up front what switching frequency they used.  In
>the past, I've gone through 3 computer PS until I found one that didn't
>affect X-10.  The higher the switching frequency, the smaller the internal
>magnetic components (inductors, and transformers).  Due to the small size of
>these wall-warts, I think you might find they are OK below 150 kHz.  I've
>been using many of these types around the house for routers, cell phones,
>etc not to mention the larger laptop supplies and have no problems at all
>with X10 / Insteon.
>
>"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
>news:44074098.1075788421@xxxxxxxxxxxxxxxx
>> The projects I'm working on will all require a +5 regulated supply so I've
>> been looking for one that I know is X-10 friendly to recommend.
>>
>>     http://www.circuitspecialists.com/level.itml/icOid/8615
>>
>> These are slender types that do not block adjacent outlets on a
>> powerstrip.
>> I've only tested the 5V/2.6A model but think it safe to assume the other
>> models use the same design. I cannot see any noise nor any PLC signal
>> attenuation.
>>
>