Thread: AM radio noise
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Old July 23rd 03, 11:22 PM
w_tom
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Filter is not unidirectional. However a filter superior to
that Radio Shack product must be inside the power supply. Too
many computer experts don't even have basic electrical
knowledge. Therefore many clone computers have power supplies
selected only on one specification - price. It is called the
MBA mentality. Inferior power supplies can be dumped into N
America at even greater profit because too many N American
technicians don't even know what a power supply is suppose to
do - never read specifications - don't even have basic
electrical knowledge.

They are called low pass filters. They work in either
direction. Nothing technically advanced about that electronic
knowledge. Would be nice if Radio Shack gave even one
specification other than price. But then this filter, like so
many computer power supplies, is also being recommended
without any technical knowledge - no number or specifications
need be provided.

Buy a power supply for $40 that is missing many essential
functions including that low pass filter. Then spend another
$40 for every other appliance to filter the noise. This is
why cost controller mentalities cause major cost increases.
Until a minimally acceptable power supply is installed, then
all other solutions are wasted money and time.

Minimally acceptable starts at about $80. If noise is not
quashed at the source, then every wire connecting to that
computer becomes a potential transmitting antenna.

Noise filter is not required. The problem first must be
fixed. Solution starts with specifications.

"Vanguard °°°" wrote:
Sounds like you need a line noise filter for your AM/FM radio, like at
Radio Shack (http://tinyurl.com/htqm). However, I don't think you can
use it for your computer as its function is to eliminate line noise from
the input side, not getting introduced from the output side. All other
devices will also be affected by the noise that your computer power
supply is putting on the line, so you might want to plan for a better
power supply.