[RFI] Cell Phone Charger Duracell made in China

[Dale Svetanoff]

Chas,

If ther unit is that "dirty", I have to wonder if this is one of those
instances in which parts (used for EMI control) are being omitted from the
production version of the item.  The only way to know for sure is to open
it up and inspect the board.  On the other hand, FCC Part 15 radiated
emission limits do not apply below 26 MHz, and they don't consider
conducted emissions.  You might try powering the device via a high quality
power line filter, BUT you would need to get one with serious attentuation
down to 2 MHz.  Those are not real common.  The usual lower cost line
filters are not effective that low in frequency.

73, Dale
WA9ENA 


> [Original Message]
> From: Chuck Shinn <chuck.shinn at verizon.net>
> To: <rfi at contesting.com>
> Date: 1/2/2011 5:38:24
> Subject: [RFI] Cell Phone Charger Duracell made in China
>
> Wall Charger (Universal Replacement) made by Duracell model # DU 5206 
> intended for charging Blackberry, HTC Eris Droid type cell phones is so 
> dirty it is a sin. This one radiates from both in's and out's. Clamped 
> up some ferrites on the DC line but it still has the house wiring 
> singing loudly on 2.7 (peak) and 30 Meters is wiped out. 14 and 7 both 
> okay. Best, Chas
>
>
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