> A redesign in 2007 changed PCB layout. and it is now K091A > http://oatleyelectronics.com/files/K091Anotes.pdf Thanks I notice that chargers Silicon Chip have done, two of which I made and use, do not have high-value inductors. Just a few turns on a 35mm toroid Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7998 / Virus Database: 4756/13874 - Release Date: 01/31/17 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .