This 80's documentation circuit includes an amplifier of the era. Used integrated circuits are uncommon today but can be used equivalents.
This circuit was found in a 1964 Electronic Design. The circuit delays the firing of a load for a...
XTAL from 4 to 20 MHz can be used in this oscillator. The XRF choke can range from 10 to 100 µH...
This 5 W power circuit with just two transistors was published in Radio Electronics magazine in...