Well, this is not quite a 1.5 volt LED after all. I'm not so sure i want to have an oscillator with a non sinewave output operating inside an HF radio. -Hue > > Have a look at this one. > http://www.instructables.com/id/Joule-Thief-circuit-in-a-Flashlight-Bulb-Yes/ > > It runs on 1.5V with no problem. > > Tom >