[RFI] New switching wallwarts - RFI potential?

[Tim Duffy K3LR]

Hi Pete!

Here is a great paper on wallwarts.

http://www.kongsfjord.no/dl/Antennas/Low%20Noise%20Active%20Antennas%20AC-DC
%20Power%20Supplies%20II.pdf


73,
Tim K3LR

-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
Behalf Of Pete Smith N4ZR
Sent: Tuesday, January 12, 2010 9:36 AM
To: RFI List
Subject: [RFI] New switching wallwarts - RFI potential?

Recently, I have begun receiving a new type of wall-wart with various 
pieces of consumer equipment and, most recently, with my QS1R SDR.  Ones 
I've seen have generally been for 5 volts at 1 amp, are much lighter 
than the old ones, and I even got one that said Switching Adapter on the 
side.

It also claimed, of course, to be FCC approved and UL listed, but no CE.

These adapters are very attractive - in addition to the high current 
rating they are narrow, so that 6 of them would fit on a 6-hole surge 
suppressor, even without wall-wart-spaced outlets.  but I'm a little 
concerned - I don't think I'm hearing mine, but my shack is a long way 
from my antennas.

Has anyone had occasion to test these critters?

-- 
73, Pete N4ZR
Visit the Contesting Compendium at http://wiki.contesting.com
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net

_______________________________________________
RFI mailing list
RFI at contesting.com
http://lists.contesting.com/mailman/listinfo/rfi