[Elecraft] [K2] : Laptop UPS

[VR2BrettGraham]

G3RXQ asked F4FNT about the Dell OEM UPS (probably
meaning power supply) for his laptop that made noise &
G4ILO then added:

> > By any chance was the UPS manufactured in China ?
>
>That's not a very fair bet; almost every bit of consumer electronics is
>manufactured in China or has most of its components manufactured there.
>
>However, if the suggestion is the responsibility for poor EMC lies in
>China, that's not true.  A lot of the responsibility comes down to the
>purchasers, who want minimum prices and do not care about features that
>only benefit non-purchasers.

An OEM laptop supply originally sold into EU will have
had to conform with EN-something-I-can't-recall-now
(conducted & radiated emissions standard).  Either that
standard is not sufficient for F4FNT's circumstances or
that particular supply conducts and/or radiates more
than it should.

Where a product is assembled generally has nothing
to do with its design.  This particular kind of product will
have little room for assembly to impact EMC
performance, whilst the design will.

G4ILO is spot on - basically you get what you pay for
& if there is a demand for cheaper products, then
somebody is going to supply them.  EMC is an area
where it is easy to cut BOM costs & get away with it,
as for the vast majority of consumers it does not matter
& many countries don't seem to bother to make sure
product delivered actually meets the standards insisted
upon.

73, VR2/KBrett7Graham/p.