Various aspects of home brew inverters

Author	Message
Tinker Guru Joined: 07/11/2007 Location: Australia Posts: 1904	Posted: 12:04am 07 Nov 2017         poida said   These E core chokes are the way to go. The one I used is RS part no. 6479389 E70/33/32 N87. It has no gap so I ground down about 0.5mm on the belt sander. Cost was $14 I used an E65 core, sourced from ebay/ Romania as had oztules and many others. Grinding it down to make a gap seems to me to be doing it the hard way. Why not just insert a suitable thickness material at all three of the mating surfaces? These cores are noisy with no gap, no matter how hard they are clamped together. My gap is made by gluing heat resistant tape (klapton?) on each pole face and trimming it with a scalpel. So, when assembled, a double thickness of that tape makes the air gap. The E core is now very quiet. Klaus