On 7 Apr 2015 at 12:04, Kenneth G. Gordon wrote: > > with the 6SR7 heater; for a 6V6 this would be 42 ohm. > > I don't understand where this 42 ohms comes from. What do you mean by > that? Oh: 6V6, not 6K6. OK. Got it now. I'm still half asleep... Ken W7EKB