Posted by casper on
URL: https://www.es-forum.com/where-to-go-any-ideas-tp4034304p4034313.html

Thanks Karl. That's a great video! I didn't know capacitors were that effective. I always thought you needed to build an RC filter, and calculate all the values and all of that hocus pocus. I'm going to try your setup with the DC output on my laptop power brick, which is extremely noisy.

I guess I can just go on eBay and look for any large cap for that purpose?

Here I found 2x 10000uF for under 2 Euros:  
https://www.ebay.com/itm/6-3-450V-10-10000uF-High-Frequency-Low-Impedance-Radial-Electrolytic-Capacitor/202704290759

Or would you recommend some other caps for this?

I agree with the price of the SineTamer is really high. However I think it is not just a bank of caps and inductors, but as I understood it is some sort of active (electronic) filter. Not sure if that qualifies the price either though. Definitely would want to test it before I buy.

The isolation transformers sound like a pretty good idea, but I think I could not handle it in my apartment, as there is too little space to hide the transformers far enough away, and no access to any grounding rods. I've noticed I'm quite sensitive to magnetic fields from such transformers (previous tests with linear DC power supplies have been a fail, because of the transformer fields). But that could work well if you live in a single home house.

Like you, I've also tested those cheap in-line AC EMI filters. They seem to make no difference what so ever.

The CleanSweep filter that was referenced in the PDF doc seems interesting. At least their graphs are impressive. I couldn't find a price on it anywhere on-line. They were all "call for quote", which means it's probably quite expensive too.

This 2 EUR capacitor idea is more in my price range.