Of late, the fans in these systems are speed controlled by PWM. Nice
high power square waves...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 5/27/20 10:08 AM, Phil Hystad wrote:
I didn’t know that an HVAC system would be an RFI generator. What part of HVAC
is the cause of this and is this a recent problem in manufacturing units?
Note — I have never lived in a home with AC — never had a need here in the
northwest (Seattle area). I probably should add that when we go to our condo
on Kauai the first thing my wife does is to turn off the AC unit.
73, phil, K7PEH
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