Following the thread on this discussion reminds me of a problem that I
had when I first graduated.
I worked in a TV studio equipment R&D lab where dc power was wired around the
building. At one point I experienced considerable noise problems at
the output of a video amplifier function that I w
Don, and the group,
This is not so complex. As you surmise, parts of the house wiring are
being switched in and out by devices on it, and the broadcast RF present on
the wiring is being modulated by that switching.
While probing around the house with an untuned RF detector, I've found
power and
> If the problem were emissions, the interference would be
> very audible with the radio station off the air.
Just a rambling thought pattern ...
I'm not sure I necessarily agree with this. If the radio carrier
drops off, the front end stage and intermediate stages aren't
carrying an rf sign
I read in !emc-pstc that Ken Javor wrote
(in <0h5h004i9i0...@mtaout06.icomcast.net>) about 'A Different Kind of
EMC Problem' on Tue, 12 Nov 2002:
>I am going to guess that the three devices you list as culprits did not have
>any requirement to meet a conducted emissi
I read in !emc-pstc that don_borow...@selinc.com wrote (in ) about 'A Different Kind of EMC
Problem' on Tue, 12 Nov 2002:
>
>I have three devices in my house that cause problems with AM radio band
>reception, but not due to emissions,
>
>In each case, the device add
ge amounts of fluorescents and
other dirty loads, totally uncontrolled by any standards - often made AM
reception impossible.
--
>From: don_borow...@selinc.com
>To: emc-p...@majordomo.ieee.org
>Subject: A Different Kind of EMC Problem
>Date: Tue, Nov 12, 2002, 2:29 PM
>
>
I have three devices in my house that cause problems with AM radio band
reception, but not due to emissions,
In each case, the device adds modulation to strong AM signals, synchronous
with the power line.
The three devices are: 1. A stereo adaptor for a Beta VCR, 2. A dishwasher
with electronic
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