Mac, I'd be a little embarrassed to write an article on something so
simple, but that's QST and ARRL these days.
However, I certainly will take your suggestion under consideration. I've
been licensed for 60+ years and have a hard time with the lack of technical
knowledge of the average newbie. Degree is in physics (from the Ordivician
times from Michigan State.....) and always worked in high tech, mostly as
an EMC/RFI engineer with some RF design thrown in for good measure. But,
it's up to us old fossils who cut our teeth with vacuum tubes like 813's
and 6146's to pass along some of the knowledge. I was reading QST when
Eimac came out with the 3-500 bottle of which I have two in my AL-82 amp.
I loved the 3CX1200A amp from Ameritron, but that amp is gone in a major
forest fire here in N. Colorado in 2012. Again, I will seriously consider
your suggestion.
*Ed Hare:* Having written that, do you believe an over designed AC power
application of a CM choke might be good for QST? Of course, it would also
cover the operation of the CM choke and applications even at RF to reject
CM noise on feedlines (I use open wire on my HF wires).
Dave - WØLEV
On Fri, Oct 2, 2020 at 9:45 PM D C _Mac_ Macdonald <k2gkk@hotmail.com>
wrote:
> If it is that good, Dave, why not send it and
> how to build it to ARRL to include in QST for
> the benefit of ALL of us?
>
> 73 - Mac, K2GKK/5
> Since 30 Nov 1953
> Oklahoma City, OK
> USAF (Retired) 61-81
> FAA (Retired) 94-10
>
> ------------------------------
> *From:* RFI <rfi-bounces+k2gkk=hotmail.com@contesting.com> on behalf of
> David Eckhardt <davearea51a@gmail.com>
> *Sent:* Friday, October 2, 2020 16:31
> *To:* Hare, Ed W1RFI <w1rfi@arrl.org>
> *Cc:* rfi <rfi@contesting.com>
> *Subject:* Re: [RFI] NEW REFRIGERATOR/FREEZER from KITCHENAID
>
> Ed, I'm well aware of the FCC exemptions for home appliances. That's why I
> took it on myself to solve the problem with the well over-designed CM
> choke. Just wish we could post pictures on this site.
>
> Dave - WØLEV
>
> On Fri, Oct 2, 2020 at 8:48 PM Hare, Ed W1RFI <w1rfi@arrl.org> wrote:
>
> > 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
> > >
> > > _______________________________________________
> > > RFI mailing list
> > > RFI@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/rfi
> > >
> >
> >
> > --
> > *Dave - WØLEV*
> > *Just Let Darwin Work*
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> >
>
>
> --
> *Dave - WØLEV*
> *Just Let Darwin Work*
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - WØLEV*
*Just Let Darwin Work*
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