Posted by Karl on
URL: https://www.es-forum.com/where-to-go-any-ideas-tp4034304p4034335.html

Most people here are coping with something similar, and I really appreciate how communicative and constructive you are :)

Also, that's a great link.

I got the steel pipes at Discount Steel in Minneapolis. They also have a store in Texas: discountsteel.com

I don't know where you are, so I'm not sure what to suggest. In the USA and Canada, https://www.metalsupermarkets.com/ might be a good resource. I haven't tried them yet, but they were recommended to me as a supplier that is sometimes willing to special-order electrical steel or grain-oriented electrical steel.

The AC filter board you bought looks similar the Delta AC filters I tested, but it might have bigger inductors. (The ones in the picture are common-mode inductors.)

I haven't disassembled any of the Delta filters yet, but they list similar components in their diagram:



The yellow things on the boards you bought are the bigger capacitors that connect to both current carrying wires (and are usually labeled as "CX" in circuit diagrams) and the blue things are tiny capacitors that connect to the ground wire (usually labeled "CY").

Here is a picture on the inside of a simpler Canny Well filter:



As for the DC filter, I don't know what the 220 on the inductors refers to, but maybe a 220 micro-Henry inductance value. I also don't have a good way to measure AC line noise, so I would really appreciate hearing what you find on the AC side.

The Bourns inductor is paired with a 1 uF film capacitor. You can't see it because it's under electrical tape. Usually I install those modified outlets into a steel electrical box with a power cord to attach it to the wall outlet. You could also install one directly into the wall outlet box if you own the building. (It's very important to have the right fuse.)