Riddle me this!
I have strong interferance since installing an air source heat pump. It is
most annoying on 20M. It is also present on 40M and 15M. My 40M antenna is
twice as far from the compressor and the noise on that band is reduced. On
20M is is S3-4. It used to be S1. Here is what I have
Hi, Robby —
The noise is very likely coming from the pulse-width modulation (PWM) circuitry
that runs the blower motor located in the air handler enclosure (often located
in the attic or on the top floor of a residence). In poorly designed and
shielded circuits the noise can escape from that
On 4/30/2012 6:13 AM, W2RU - Bud Hippisley wrote:
The noise is very likely coming from the pulse-width modulation (PWM)
circuitry that runs the blower motor located in the air handler enclosure
(often located in the attic or on the top floor of a residence). In poorly
designed and shielded
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