Yup. Lower wattage supply uses smaller componets which allows the inclusion of
filter components (presumably due to more room in chassis space and components
budget). It's a hypothetical model, as I've never taken one of these "big
boys" apart, but I've seen going to a lower-power supply fix this kind of
noise problem more than once. Of course, don't go to a PS that puts out less
power than your computer needs. :-)
I saw in another post in this thread that Antec was said to be a power supply
one could count on to be less noisy. I think it has a lot more to do with the
power rating than with the brand. The PS I had that was putting out so much
noise was an Antec, the biggest one they made. I'm still using it, but it is
brute-force choked up the yin-yang.
Bill W5WVO
Alan D. Wilcox wrote:
SOLVED!
Just replaced the 400w supply with a 300w that I had in the junk box.
Both foreign cheap
units, but that's all the local PC shops seem to carry (at least at my
QTH). The replacement
is nicely quiet ... and a lot easier fix than what I was dreading!
Now that I can hear the radio properly, back to doing the remote audio
with HRD.
Thanks for the help!
Alan
------------------------------------------------------------------------
Alan D. Wilcox wrote:
Hello,
I gave away the feeble old PC I had by my radio equipment and
replaced it with a newer one ...
Now I have S9+ noise wiping out 20 and 30 meters.
Using same keyboard, mouse, monitor; just the PC in a new case.
Evidently it has a
noisy switcher supply in it. Tried 110V in-line filter, also
different 110V house circuit,
but still have noise. Grounds don't help. Don't happen to have a box
of toroids for chokes.
I've got an old PC supply or two in the junk box, but hoping
something else might fix.
Any thoughts on an easy fix?
Thanks,
Alan
Alan D. Wilcox, W3DVX
570-321-1516
http://WilcoxEngineering.com
Williamsport, PA 17701
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