Building an eBay power filter kit (with schematic).

This is a very common kit on eBay intended for use with audio amplifiers to filter out mains borne noise. It looks as though it's been copied from another design, but with the usual flaws introduced during the interpretation. Particularly with regard to separation, current carrying path, pad sizing for mechanical strength and a possible swap of MOVs for class Y filter caps.

It's quite easy to build with basic tools but will need mounted in a suitable enclosure (often the amplifier itself) with insulated pillars due to a slight design issue with live to ground clearance.

This module might find applications inside other equipment sensitive to mains borne transients and noise. Keep in mind you can buy fully compliant inline filter modules for equipment from local electronic suppliers for professional applications.

I may have described the common mode choke completely back to front. Let me know your thoughts on that.

Here's a search link for the kits:-
https://www.ebay.com/sch/i.html?_from...

If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.