Found in a 1969 documentation, this circuit for the 20 MHz band does not use a transformer. The circuit is a phase detector that makes use of the transistor of the time.
This control for 1/15 HP motors with 5,000 rpm for 115 V power grid was suggested by a Motorola...
Servo motors operate from the changes in the pulse width in a range between 1 and 2 ms. The...
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...