When it comes to appliances, there may be nothing to enforce. Appliances are
categorically exempt from any specific emissions limits under Part 15. A
refrigerator with removed filtering components may be perfectly legal, subject
only to the manufacturer's requirement to use "good engineering practice,"
whatever that means and a requirement for the operator of the device to use it
in a way that does not cause harmful interference to licensed radio services.
-----Original Message-----
From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> On Behalf Of David
Eckhardt
Sent: Thursday, October 1, 2020 11:19 AM
To: KD7JYK DM09 <kd7jyk@earthlink.net>
Cc: rfi <rfi@contesting.com>
Subject: Re: [RFI] NEW REFRIGERATOR/FREEZER from KITCHENAID
Removal of the components that allow SMPS's to pass FCC, if they are tested at
all from China, has become a common practice. It's a juicy given for the
contract manufacturers! This practice has been common for nearly 15 to
20 years. You guessed it: "With Love, from China". Most are not even tested
for EMI/RFI these days. And China has taught others to follow in their
footsteps. Again........, where is the FCC???
Dave - WØLEV
On Thu, Oct 1, 2020 at 2:27 PM KD7JYK DM09 <kd7jyk@earthlink.net> wrote:
> "I wouldn't be surprised if the noisy circuit has mounting holes on
> the pc board for RF suppression components that they added to pass a
> compliance test, then left off in production."
>
> No surprise there, if so. 20 years ago, I worked for a company
> designing much of what we use to communicate online now. Prototype
> power supplies were designed, and tested, exceeding specs. They were
> reviewed state-side, found good, and put into production. Somewhere
> around 10,000 - 15,000 units were ordered to be distributed with the
> product as there was a considerable price drop at those numbers, far
> less than the FCC/CE/UL certified units from Digikey, at under $3 a pop.
> Later, it was found out why. ALL suppression, and filtering
> components were removed. It was easier to send out the bad units,
> they worked, than find a legitimate supplier in Asia. Eventually, the
> company went under, and all assets auctioned off. God only knows
> where the garbage SMPSUs were later used.
>
> Kurt
>
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>
--
*Dave - WØLEV*
*Just Let Darwin Work*
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