Okay, perhaps I'm being a bit picky, but here's the scoop:

I find a lot of switchers are audibly noisy. That is, they emit a 'hiss'
noise from their circuitry. Some units are barely audible, others are
distractingly loud. (yes, I know some people can't hear 'em at all, but
my wife and I certainly can, which is why there are a few toggle
switches inserted on the ac lead of a couple of our 'not often used'
appliances.)

I just bought a new PS-125 to go with my IC-756ProII, and the PSU works
well, but wow it hisses like a leaky bicycle tire! (The DC is pure and
clean, I'm referring to the audible hissing emanating from within the case.)

Is there a common offending component, such as a loose coil form or
winding into which I may drizzle a wee bit of krazy glue? Or did I get
unlucky with one particular unit and everyone else here has a nice quiet
PSU that silently sits there (until of course the internal fan fires up,
but that's quite tolerable.)

So, fixable (as in 'they all do that'), or exchange the darn thing (as
in 'most of them are very quiet') ??


If anyone could share some experience here on this one, I'd be most
grateful.

Thanks!
Bob.