Abstract :
A planar tetrode developed primarily for the amplification of r.f. power in the region of 3 kMc/s, is described. The valve comprises a rugged, thermally stable electrode structure capable of providing 40 watts of c.w. output power at 3 kMc/s with a gain of 7·5 dB. Some unusual design features of the valve and relevant performance data are presented.
