[RFI] Refrigerator RFI

[Michael Carter]

Hi Jim (W6YA),

Others may chime in with specific model recommendations,
but I'll note that modern refrigerator/freezer units that attain a
good Energy Star rating invariably use PWM control of air
circulation fan motors and Variable Frequency AC drive
to the permanent magnet synchronous compressor motor.

My very old GE Arctica unit has the PWM fan motor control
but not the more modern VFD compressor control.  I don't
hear any RFI from it in the HF bands, but at VHF it radiates
a bunch of stuff via the house AC wiring.  I haven't worried
about choking the line cord as K9YC recommended, but
I might if I get serious about weak signal VHF/UHF operations.

73,
Mike, K8CN
________________________________
From: RFI <rfi-bounces+mike.carter=unh.edu at contesting.com> on behalf of Jim McCook <w6ya at cox.net>
Sent: Thursday, September 7, 2023 8:04 PM
To: RFI List <rfi at contesting.com>
Subject: [RFI] Refrigerator RFI

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Help!  We suddenly need a new refrigerator, so am looking to find out
which ones are RFI generators and which ones are established as clean.
Any input?   73, Jim W6YA
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