[RFI] A note from Sangean about switching power supplies

David Robbins k1ttt at verizon.net
Sat Jan 7 09:18:59 EST 2017

It is interesting that they warn you about that... but a company making a radio should at least try to choose a wart that is quiet.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Howard Lester
Sent: Saturday, January 07, 2017 14:03
To: rfi at contesting.com
Subject: [RFI] A note from Sangean about switching power supplies

I’m looking through the online operating manual for a Sangean AM/FM radio I’m interested in buying, and I came across this little note in the Cautions section. I didn’t know about the “background” cited, and I do find Sangean very responsible to print this.

Howard N7SO


Sangean suggests that you keep your AC Adapter at least 12 inches away from the radio while listening to the AM Band.
Your Sangean Radio is powered by an AC adapter which is a “switching” or “switch-mode” type. The DOE (Department Of Energy) has a Federal mandate requiring all manufacturers to use this type of power supply. This newer power saving technology has the unfortunate side effect of causing interference to the AM radio band. 
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