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Old 02-24-2018, 02:06 AM
serendipitor serendipitor is offline
Join Date: May 2014
Location: Western Washington
Posts: 41
Originally Posted by Ufopolitics View Post
Hello Ewizard,

I also have a ferrite square core split in two equal parts that I took off a big TV HV Coil...I am gonna test it, even though ferrite is designed for HF, as I believe it does not have good retention properties
You are right in that this type of core is designed not to have remnance. A better toroid material would be to try a tape wound square loop type of core, which were used in small inverters in the 60's and 70's. "Square loop" refers to the B-H curve shape, not the core itself. The remance is almost as high as the Bsat value.