This Vox circuit uses a specific Motorola component. We found the circuit in the 1990 Linear Databook of the same company. The transistor must be in accordance with the switched load.
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...
This circuit produces 1 kHz square signals using the CMOS IC 4070. The frequency is given by the...
Found in a 90s PE Hobbyst Handbook, this circuit mimics the sound of a space gun. The components...