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Re: [RFI] NEW REFRIGERATOR/FREEZER from KITCHENAID

To: rfi@contesting.com
Subject: Re: [RFI] NEW REFRIGERATOR/FREEZER from KITCHENAID
From: K9MA <k9ma@sdellington.us>
Date: Thu, 1 Oct 2020 12:43:48 -0500
List-post: <mailto:rfi@contesting.com>
Many years ago, I worked for a small, well-known US electronics manufacturer. I was in R&D, and the standing joke was that once a design went to manufacturing, they pulled out parts one at a time until it stopped working, then put one back.

73,
Scott K9MA



On 10/1/2020 9:27 AM, KD7JYK DM09 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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--
Scott  K9MA

k9ma@sdellington.us

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