FWIW, I've had two Bryant furnaces over the past 28 years, with no RFI
problems in either direction. Both had variable speed inducer motors and
two speed blowers. The blowers may just be two speed induction motors.
Both had control boards without a lot of obvious filtering or shielding.
I live in the city, with fairly high background noise levels, so
emissions might be noticeable in a quiet location. 1500 W into the shunt
fed tower 50 feet away never affected either. Unlike the water heater.
73,
Scott K9MA
On 1/8/2021 6:11 PM, Jim Brown wrote:
On 1/8/2021 3:27 PM, Kenny Silverman wrote:
he spent the last 2 days signing up to ham radio and hvac groups to
learn about RFI and WhAts the least susceptible to causing RFI. You
don’t get That very often! He’ll be getting my business assuming he’s
in the ball park of others.
Wow! If this works out for you, be sure to post his info.
Another thing for him to look at is my RFI chasing page. There's a
short discussion of variable speed motor controllers on page 14. In
the second link, it starts with slide 183.
http://k9yc.com/KillingReceiveNoise.pdf
http://k9yc.com/KillingRXNoiseVisalia.pdf
73, Jim K9YC
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Scott K9MA
k9ma@sdellington.us
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