[RFI] NEW REFRIGERATOR/FREEZER from KITCHENAID

[K9MA]

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 at sdellington.us