---------- From: Shaun [SMTP:shaunobrien-at-geocities-dot-com] Sent: Tuesday, April 07, 1998 12:05 AM To: Tesla List Subject: Medhurts K formula Does anyone happen to know how to calculate the K of a secondary. I need to find out this for a program I'm working on. Thanks for your help. Shaun O'Brien Member of The Oklahoma Tesla Coil Builders http://www.geocities-dot-com/SouthBeach/Pier/2756/index.htm