[RFI] Single stage HVAC with ECM

[K9MA]

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
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi


-- 
Scott  K9MA

k9ma at sdellington.us