Stopping RFI from a PC

[W. Watson]

For those interested in a view of the PSU that was defective, see
<http://home.earthlink.net/~mtnviews/misc4.html>. I'm sure the view is quite
a bit like the one that is currently in the PC.


For those wanting me to put a filter on the line, I bought a Radio Shack
filter and tried it. No effect.

As I mentioned in some other part of this thread, note that if I plug the
other computer in the room to the same room outlet as the PC with the new
PSU that causes the noise, it too causes the same noise. Either computer in
the room will cause the same noise when plugged into the same outlet, not
just the one I originally discovered was involved. That is, one might
conclude that it is the outlet that is the source of the noise, and not the
PSU.

That's about as far as I'm going with this problem. It'll have to wait for
another day.

--
Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

"... astronomy is useful because it shows [not only] how small
our bodies are, but how large our minds are." -- Henri Poincare

Web Page: <home.earthlink.net/~mtnviews>

 

[w_tom]

Nothing in Radio Shack attached to that power cord can solve
the RFI problem. Cheap filter on power cord was never
properly recommended because it would accomplish nothing. To
be effective, a 'power cord' filter would cost maybe $100.
Effective filter must be power supply internal. The Radio
Shack filter would not solve a problem created by a missing
internal filter. Power supply internal filter is often
'forgotten' when selling only on 'price and power' numbers.

Meanwhile, a damning fact was from power supply vendor who
said detailed and numerical specifications were not
available. That implies a power supply will be missing
essential functions - as demonstrated by RFI noise. How many
other essential functions are also missing? That supply is
more useful as a doorstop.

The outlet is not a source of such noise. Some outlets are
wired so to be better antennas. Any power supply that
transmits RFI is defective internally. Some outlets simply
will be better antennas for that RFI transmitter - a power
supply designed to be sold only on price to bean counters.

 

[Jamie]

For those interested in a view of the PSU that was defective, see
<http://home.earthlink.net/~mtnviews/misc4.html>. I'm sure the view is
quite a bit like the one that is currently in the PC.


For those wanting me to put a filter on the line, I bought a Radio Shack
filter and tried it. No effect.

As I mentioned in some other part of this thread, note that if I plug
the other computer in the room to the same room outlet as the PC with
the new PSU that causes the noise, it too causes the same noise. Either
computer in the room will cause the same noise when plugged into the
same outlet, not just the one I originally discovered was involved. That
is, one might conclude that it is the outlet that is the source of the
noise, and not the PSU.

That's about as far as I'm going with this problem. It'll have to wait
for another day.

nope, try using a UPS unit on one device like the Computer.