>I thought tungsten had a very positive temperature coefficient, so that >the resistance went up when the filament got hot. If you retune for the >larger overall loading capacitance, do you still tune for maximum >voltage output at the new setting or for something else?? > >-- Bert -- > Bert, About 10:1 hot:cold resistance change. I just measured a 100W light bulb: 10 1/2 ohms cold. jim