[Elecraft] Wall warts, et heat

Stewart stewart at baker.nildram.co.uk
Wed Dec 9 08:46:03 EST 2009


Many of the ones we find in the UK emit copious amounts of RF 
interference. Although they are CE marked, we suspect that this 
only stands for - China Export.

73
Stewart G3RXQ
On Wed, 09 Dec 2009 07:01:05 -0600, Randy Farmer wrote:
> I believe one powerful motivation for the outboard supply 
approach is
> that it exempts the manufacturer from having to put the entire
> assembly through the various safety and regulatory processes 
(UL,
> CSA, CE, etc.). He can instead put the regulatory burden on the
> subcontractor who furnishes the supply. This can save LOTS of 
money
> when bringing a new electronic product to market.
>
> 73...
> Randy, W8FN
>
>>   I continue to clench my teeth when I see "a neat little 
package that
>>works fine, just plug the wall wart into the wall socket and 
enjoy the
>>toy". That's a cheap, and somewhat dangerous way to avoid adding 
a bit
>>of bulk, a far better power supply, a switch, and some 
ventilation to a
>>toy or rig that someone will use for who knows how long.
>
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