Technical Digests - A Negative-Grid Triode Oscillator and Amplifier for Ultra-High Frequencies
01 October 1937
HE author describes three negative-grid triodes of unusual design which operate both as oscillators and as amplifiers at ultra-high frequencies. The power output of the smallest tube as an oscillator at 1500 megacycles is 2 watts, and is still capable of an output of 1 watt at 1700 megacycles with an oscillation limit of 1870 megacycles corresponding to a wave-length of 16 centimeters. This tube also offers possibilities as an amplifier at frequencies as high as 1000 megacycles. Such capabilities of the negative-grid triode are notable since this device has appeared to lag behind the magnetron as an oscillator at fre- Fig. 1--Experimental double-lead tubes.