Λυχνία 813
Ισχύς εξόδου σε τάξη c : 275w
Used in Amatuer, Military and Commercial Transmitters.
The 813 / is a five-electrode beam-power transmitting tube of high sensitivity, designed for use as a modulator, amplifier, and oscillator. The cathode is a thoriated-tungsten filament. Maximum ratings apply up to a frequency of 30 megacycles. Cooling is obtained by radiation. With adequately shielded circuits neutralization is unnecessary.