This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be applied to modern equivalent transistors.
Using a MAX644 this circuit was found in the April 1989 issue of Radio Electronics magazine. The...
This transmitter for the 2-meter range with a power of 1.5 W was found in a magazine 73 for radio...
Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output...