[RFI] Multi-Stage High Efficiency Air Conditioner Units

[K9MA]

On 2/8/2020 19:58, David Eckhardt wrote:
> If things are designed and executed properly with EMC/RFI in mind, there
> should be no need for these clamp-on ferrite 'beads'.

SOME kinds of home electronics devices have gotten better. 25 years ago, 
my YL bought a fairly expensive electronic piano. Despite several pounds 
of ferrites on the power cord, I still wiped it out. Then, a couple 
years ago, she bought a new one. No external ferrites. I've tried my 
best in many contests, but I can't make the thing flinch. (She often is 
practicing when I'm operating. I'd hear about it.) It's a different 
brand (Kawai now, Yamaha then). I'm a bit puzzled by that, actually: Why 
would an electronics manufacturer go to the trouble of making something 
that RF proof, when so few of their customers have a transmitter that 
close? Not that I'm complaining.

Other home electronics devices seem to have gotten better, too. Now, if 
only they'd do something about those switching supplies!

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us