Tnx
73, Dan
On Mon, Nov 11, 2024, 12:42 PM Dave (NK7Z) <dave@nk7z.net> wrote:
> Think of a variable speed fan controller as an automatically controlled,
> dirty 500 watt square wave generator, connected to a long non twisted
> wire, running a motor... They are quite noisy...
>
> I have a neighbor that has one, (probably 70 feet from my antenna), and
> he used to run it 7 minutes on, 7 minutes off to clean his home air. I
> asked him if he could change that to as needed, and I now have 17, 15,
> 12, and 10 back, when it is not running, which is most of the time...
> He has two Carrier units, and they make zero noise.
>
> His Mitsubishi unit is the culprit in the RFI generation. The model
> number is:
>
> SUZ-KA12NA
>
> The installer has no idea of what RFI is...
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
>
> On 11/11/24 08:40, Dan K2YWE wrote:
> > Thanks Jack.
> > Do your units have variable speed or multi-speed fan control?
> >
> > 73, Dan
> >
> >
> > On Mon, Nov 11, 2024 at 11:10 AM Jack Ference <jackference@gmail.com>
> wrote:
> >
> >> Hi Dan,
> >>
> >> Both Frank W3LPL I have had good luck with Carrier. He replaced one unit
> >> as nd replaced two a few years apart.
> >>
> >> I bonded the cabinet door to the sides, installed a powerline choke on
> the
> >> power to the blower motor and installed a coil of wire choke around the
> >> thermostat wires.
> >>
> >> I opted for one step down from the highest efficiency units so the
> >> compressor had switched settings rather than variable settings
> controlled
> >> by electronic circuitry.
> >>
> >> Carrier was aware of my concerns and supplied the documentation for the
> >> fixes. They happened to be the same fixes I did on my first unit
> replaced.
> >>
> >> Jack W3KX
> >> Sent from my iPhone
> >>
> >>> On Nov 11, 2024, at 10:56 AM, Dan K2YWE <dan.k2ywe@gmail.com> wrote:
> >>>
> >>> I'm need to replace my 25 year old HVAC with a new oil furnace and AC
> >>> system.
> >>> EMIis a great concern. It's a small house and efficiency is of little
> >>> importance.
> >>> What are the recommended brands and/or models?
> >>>
> >>> 73, Dan
> >>> _______________________________________________
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