Bill,
Money does tend to drive things, however the ARRL has made great
progress, in getting some items corrected, despite the lobbying that I
am sure goes on with regards to this sort of thing.
It is a slow, careful, fight, but one worth entering, so bravo to the
ARRL for what they are doing on the RFI front. It would be nice if the
FCC did more, but they too have limited funds, like the ARRL.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 2/2/23 06:25, bill steffey ny9h wrote:
I imagine that the "appliance" lobby has many congressmen on their
payroll, compared to our washington efforts. Too bad it will be too late
when the FCC changes that "exemption" due to complaints from someone
more influential than us. IE public service, aircraft,,
On 2/2/2023 9:07 AM, Dave (NK7Z) wrote:
Morning Ed,
Why not create an item, appliance, device reporting web page on the
ARRL site. Force the user to fill it out completely in order to
submit a report. Let the users know up front that you won't be able
to get to all the items, and you will contact them if you need more
info. Then you could cherry pick the items you choose to deal with.
That wound also help in standardizing your input from the masses.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 2/2/23 05:49, Hare, Ed, W1RFI wrote:
We are seeing a greater and greater trend to efficiency in all
products, so pulse-width-controlled motors, switching supplies and
inverters are becoming more prolific.
This could be especially problematic in the US, because under FCC
Part 15 rules, what FCC designates as "appliances" are categorically
exempt from specific emissions limits. The manufacturer is only
vaguely required to use "good engineering practice" in its design.
Unfortunately, there are thousands of appliances, to ARRL can't go
out and buy one of each to test. We rely on reports, but even when
there is interference, few of the reports we receive contain enough
specifics to identify products -- appliance or other -- that are
specific problems.
And, of course, amateurs don't contact us to tell us that they are
not receiving interference from their neighbor's home appliances, so
we have no idea about the good guys.
Ed, W1RFI
ARRL Lab
________________________________
From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> on behalf of
Wes Stewart via RFI <rfi@contesting.com>
Sent: Thursday, February 2, 2023 8:27 AM
To: rfi@contesting.com <rfi@contesting.com>; James Gordon Beattie Jr
<w2ttt@att.net>
Subject: Re: [RFI] LG 12,000 BTU Model Advice
As I suspected. From the LG website: "*Inverter Technology is a key
attribute of LG’s new room air conditioners. It is used in
conjunction with a variable-speed compressor and adjusts the
compressor motor speed to regulate temperature. "
If you are okay with the current model, I would put in another one.
The efficiency difference in percentage sounds like a lot, but from a
power consumption standpoint at this size is immaterial.
I went through this agony a couple of months ago when shopping to a
whole house, roof-mounted, packaged heat pump. The latest trend is
to use a Bosch which has an inverter driven variable-speed compressor
and variable-speed condenser fan, plus an ECM blower. The option was
another Trane/American Standard with a two-speed compressor, single
speed condenser fan and an ECM blower.
I did not have objectionable noise from the ECM, but my antennas are
>100 feet from the house. I could not get an answer about the rfi
potential of the Bosch from any source, including here, so took the
safe route.
Wes N7WS
On Wednesday, February 1, 2023 at 10:28:40 PM MST, James Gordon
Beattie Jr <w2ttt@att.net> wrote:
Hi Folks!
I have an LG LW1222ERSM 12,000 BTU air conditioner that sadly needs
to be replaced.
The dimensions are 15x24 going through a framed hole in the wall
ofbthec10x16 foot ham shack. This somewhat constrains replacement
choices.
I noted that I could buy the same model or an LG LW1222IVSM which is
a "dual inverter" model. I'm not sure of the benefits in buying this
inverter model, but I am a bit concerned over the noise potential of
the inverters.
Does anyone have experience with this model or another LG inverter
model?
Up to now, I've had no noise issues with the standard model, but
since this in the ham shack, I figured it might be good to ask. Also,
the outdoor meter panel is 20 feet away and the indoor ham shack
subpanel is 10 feet away. Power from the utility transformer is
aerial and 160 feet away. The air conditioner is on a dedicated 20 A
115 VAC breaker from the ham shack subpanel
Thoughts anyone?
73,
J. Gordon "Gordie" Beattie, Jr., W2TTT
201.314.6964
W2TTT@ATT.NET
Gordon.BeattieJr@VIAVISolutions.com
Get On The Air!
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