On Jan 16, 2008 1:06 AM, Jim McDonald <jim at n7us.net> wrote: > I remember reading, a long time ago, that the Heils used to be 200 ohms but > they were later changed to be lower impedance. It's the other way around. They used to be lower impedance but changed to 200 ohms 5-7 years ago or so. 73, Barry N1EU