[RFI] Fwd: RFI Digest, Vol 241, Issue 20

[Steve Dyer W1SRD]

Steve,
I guess you don't believe and want some evidence.
I have the Bryant Evolution Extreme (equivalent system to the Carrier 
Infinity Greenspeed) and it is RF quiet. It was one of the conditions of 
purchase I made with the installer. Both the air handler and compressor 
are VS.
This is a 2013 vintage system so I have a few thousand hours in front of 
the radio with the system on and off.
I live in a rural location so it's not masked by local noise. The beams 
are within 100'.
I can stand right next to the outdoor unit with a SW radio and barely 
hear anything.
I am extremely pleased with the systems lack of RFI, efficiency and home 
comfort.
Variable speed systems can be engineered well for EMC.
73,
Steve
W1SRD

On 2/14/2023 11:17 AM, Steve London wrote:
> Better yet, show us spectrum displays of about 100 kHz width, on the band
> with the closest antenna, when the band is dead, with the fan running, and
> with the fan off.
>
> 73,
> Steve, N2IC
>
> On Tue, Feb 14, 2023 at 12:05 PM James Jordan <k4qpl2 at gmail.com> wrote:
>
>> I have a Carrier "Infinity" system with fully VS drives on both the
>> compressor and air handler fan. It's their top of the line most efficient
>> system. Never heard a peep of RFI from it. I'll walk closer to the units
>> with an AM radio to see if I'm missing something and if I hear anything
>> I'll post again.
>> 73,
>> Jim K4QPL
>>
>> On Tue, Feb 14, 2023 at 12:57 PM Dennis Monticelli <
>> dennis.monticelli at gmail.com> wrote:
>>
>>> The variable speed fan motors are bad news.  Fixed speed or multiple
>> fixed
>>> speed (selected by winding) are fine.  However the fan motor isn't the
>> only
>>> motor in the system.  Look into the compressor too.  There is also a
>> lesser
>>> chance that the controller board generates noise you can pick up.  If
>>> accessible during installation, some ferrite sleeves on the digital
>> board's
>>> wires are a good idea.
>>>
>>> Both of my Daikin HVAC units are completely quiet but those models were
>>> chosen with no PWM drive motors and I did put ferrites on the controller
>>> board for extra insurance.
>>>
>>> Dennis AE6C
>>>
>>> ---------- Forwarded message ---------
>>> From: <rfi-request at contesting.com>
>>> Date: Tue, Feb 14, 2023 at 9:00 AM
>>> Subject: RFI Digest, Vol 241, Issue 20
>>> To: <rfi at contesting.com>
>>>
>>>
>>> Send RFI mailing list submissions to
>>>          rfi at contesting.com
>>>
>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>          http://lists.contesting.com/mailman/listinfo/rfi
>>> or, via email, send a message with subject or body 'help' to
>>>          rfi-request at contesting.com
>>>
>>> You can reach the person managing the list at
>>>          rfi-owner at contesting.com
>>>
>>> When replying, please edit your Subject line so it is more specific
>>> than "Re: Contents of RFI digest..."
>>>
>>>
>>> Today's Topics:
>>>
>>>     1. RFI from Carrier Heat Pump? (RVZ)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Tue, 14 Feb 2023 04:54:07 +0000 (UTC)
>>> From: RVZ <rlvz at aol.com>
>>> To: rfi at contesting.com
>>> Subject: [RFI] RFI from Carrier Heat Pump?
>>> Message-ID: <735693955.1361834.1676350447226 at mail.yahoo.com>
>>> Content-Type: text/plain; charset=UTF-8
>>>
>>> Hi Guys,
>>> ?I've seen posts where some Air Conditioners and Furnace units with
>>> variable speed motors create RFI on the Ham Bands.? I'm thinking of
>>> purchasing a new Carrier 3.5 ton Heat Pump, Model 25SCA542, with a "fixed
>>> speed" blower and am wondering if anyone has had RFI issues with
>>> these??Thank You in advance for your thoughts.?73, Dick- K9OM? (
>>> RLVZ at aol.com
>>> )
>>>
>>> ------------------------------
>>>
>>> Subject: Digest Footer
>>>
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
>>>
>>> ------------------------------
>>>
>>> End of RFI Digest, Vol 241, Issue 20
>>> ************************************
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
>> _______________________________________________
>> RFI mailing list
>> RFI at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi