[AMRadio] LED Magnifying Lamp by Duratool

Robert Nickels ranickel at comcast.net
Tue Sep 22 14:06:45 EDT 2015

On 9/22/2015 12:57 PM, Rob Atkinson wrote:
> And what would it have cost the manufacturer to put in a cap at the plant?
Not much, Rob but many devices get to market without any attempt to 
mitigate RFI.    I found this out after replacing the power supply in a 
PC only to discover all the bands were "dead" - because the noise floor 
had been raised to the point where only the strongest signals could be 
heard.   There was an IEC connector for the cord, but no filter components.

MPJA is a good source of AC line filters at low prices, like this:


Clicking on item pictures enlarges to where the schematic and component 
values can be read,  as well as the mfgr's name and p/n so the datasheet 
can be obtained for more details.    These are great for homebrew 
projects or can be put in a box to add an inline filter.

73, Bob W9RAN

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