This is a little 80 meter tube transmitter. I used a 3A5 tube .It has a power out of 300 milliwatts . I built it on a piece of wood and used a 35mm film container to wind the tank coil on.I use a 1.5 volt "D" battery for the heater and 5 nine volt batteries in series for the plate.The tank coil is 26 turns of #26 and the antenna link is 4 turns on the cold end of the tank.The tuning capacitor is the 140pf section of a broadcast band tuning capacitor.
Michael Tyler WA8YWO
Richwood, West Virginia