Thanks to all for the insights. I was looking to see if someone had
specific experience with this manufacturer and/or model.
As for the advice on recourse in the event of problems: I have requested
their engineer to get a RFI/EMI statement from the factory and whether a
suppression kit exists if required. It is a 2-speed motor (although they
call it a variable 2-speed system), so somewhat less of a risk, but...
Ontario has a 10-day cooling off period on these things, so if I don't get a
satisfactory response and statement that in the event of problems, they will
fix to my satisfaction within that timeframe, it will be cancelled.
The comment on "normal" noise levels is painfully appropriate. I live in
centre city in a row house where typical QRN levels are S7-9 which makes DX
chasing a bit more challenging (4 to go for HR#1) and also mandates barefoot
operation. K9YC chokes in use (thanks Jim for all of your great information
- wish I understood it all...). And have used a portable AM radio to help
one neighbour find out that their furnace motor was about to fail and have
it replaced in the middle of the winter.
73, George VE3YV / K8HI
Message: 5
Date: Sun, 09 Jul 2017 11:38:03 -0400
From: "John K9UWA" <john@johnjeanantiqueradio.com>
To: "rfi@contesting.com" <rfi@contesting.com>
Subject: Re: [RFI] Any RFI issues with Amana AMVC96 Furnace?
Message-ID: <59624DDB.28815.F893821@john.johnjeanantiqueradio.com>
Content-Type: text/plain; charset=US-ASCII
To say that one either Has Noise or doesn't have Noise with a Furnace or any
other device one needs to do a little qualifying along with that statement.
If you have enough "Other Noises" then you wouldn't know if the furnace was
making noise or not making noise. If your just setting there listening to
your radio on your antennas and you don't specifically hear something
different when a device starts up or stops or is running it may well be
creating noises you don't hear. The reason you don't hear it is because all
the other noises your radio is hearing are louder than this furnace or
whatever device your talking about.
You will have a lot more credibility if you stated that you had listened to
your furnace up close with some sort of sense antenna and a receiver capable
of hearing noise across a wide frequency range. The general noise level in
one location to another can vary by in some cases by several S Units.
I like my old Sony Transistor radio model ICF-2001 when looking for noise
sources. Others have mentioned other receivers and SDR's as well. Do a
walkabout your own property and house with one of these receivers and then
go kill your main breaker to the house and see the diffeence in your noise
level. Keep in mind sometimes killing the Main Breaker still doesn't turn
off some devices that have batteries or other methods of maintaining power
to the device for a period of time.
Please go read and study Jim K9YC's documentation on finding and killing
noises. Start here. http://audiosystemsgroup.com/KillingReceiveNoise.pdf
My Furnace and AC guy is an old family friend. When it was time for a new
one in this house I started with I don't want a furnace that maes RFI. His
next statement was. Then you don't want any furnace with a variable speed
air handler motor. Two Speed Motor is OK. Hi Speed for AC and low speed for
Heat cycle. The only thing I hear from it is a Click from the motor starter
in the AC unit. I can live with that much noise.
John k9uwa
John Goller, K9UWA & Jean Goller, N9PXF Antique Radio Restorations
k9uwa@arrl.net Visit our Web Site at:
http://www.JohnJeanAntiqueRadio.com
4836 Ranch Road
Leo, IN 46765
USA
1-260-637-6426
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