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@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@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@contesting.com>
> > Date: Tue, Feb 14, 2023 at 9:00 AM
> > Subject: RFI Digest, Vol 241, Issue 20
> > To: <rfi@contesting.com>
> >
> >
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> > 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@aol.com>
> > To: rfi@contesting.com
> > Subject: [RFI] RFI from Carrier Heat Pump?
> > Message-ID: <735693955.1361834.1676350447226@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@aol.com
> > )
> >
> > ------------------------------
> >
> > Subject: Digest Footer
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> > ------------------------------
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> > End of RFI Digest, Vol 241, Issue 20
> > ************************************
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