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Old 21st Aug 2018, 7:23 am   #10
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,800
Default Re: Long Wave interference problem solved.

The window over the filter components may seem twee but it is a good thing.

There is an issue with a lot of PC power supplies where their printed circuit board is laid out to take the components for a decent mains filter to stop outgoing muck, but the components aren't loaded. Shunt capacitors are simply missing and wire links are loaded in place of much more expensive chokes.

It's suspected that fully loaded filters are provided in units going for approvals testing, and once they have the paperwork signed, the production units are cheapened-off and dirty.

There seems to be no downstream enforcement of standards.

So, seeing the parts in position is reassuring that you're not being taken for a ta-ta.

David
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