We found this circuit with the 6A6 double triode in a 1938 Radio Handbook. The power source is not provided.
This 1.5 A source for FM transmitters was originally intended for the transmitter described in...
This useful power supply can provide voltages from 0 to 12 V with currents up to 2 A, set in...
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...