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Mains filters - DIY-Audio-Heaven
https://diyaudioheaven.wordpress.com/tutorials/power-supplies/mains-filters/
Mains filters are also used in electronic equipment to prevent influence from garbage that could be present on mains. This will depend on what the device is for and how it may and may not ‘fail’ under certain circumstances. In this case the filter is there to improve immunity of that device. In other words, garbage on the mains is lowered in amplitude (NOT removed !) …
Mains Filter - DIY, Audio, Guide
https://www.diy-audio-guide.com/mains-filter.html
The right block consists of two 12,000uF electrolytic capacitor and a bridge rectifier to remove the DC from the mains. Green represents ground. Red represents live. Blue represents EMI/RFI filtered neutral. Purple represents DC free neutral. The topology is quite simple. Film capacitors from neutral to ground Live to ground Neutral to live
Mains filtering - diyAudio
https://www.diyaudio.com/archive/blogs/abraxalito/mains-filtering/index.html
Pre-built mains filters are of some use in audio, but they're not really optimised for high-end sound. For audio source components, the draw is normally under 100W and so the current (assuming here 230V supply) is under half an amp. Few if any off the shelf mains filters are designed for such low currents.
DIY: Mains Line/Noise/EMI Filtering | Audio Science …
https://www.audiosciencereview.com/forum/index.php?threads/diy-mains-line-noise-emi-filtering.976/
Seattle Area. Nov 6, 2016. #1. This is probably too technical for most people here but if you are into DIY work this is by far the best video I have seen on basics of line filtering. It explains for example why there are multiple capacitors put in parallel. Why different devices like chokes are used, etc. And he does this in a very intuitive way.
mains RF filter | diyAudio
https://www.diyaudio.com/community/threads/mains-rf-filter.21583/
I'm thinking of making a small filter to plug into a wall socket to remove some RF noise. The sort of thing I'm looking for is a device that I can plug in and out. I plan to use a plastic power supply unit with an earth pin. If I connect a 100nf (X2) capacitor across the …
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