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@contesting.com [mailto:rfi-bounces@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
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