We found this Vox in a 1969 Motorola documentation. Transistors support modern equivalents and the SCR can be a TIC106. The reset is done by a push button.
Small time intervals up o some minutes can be achieved with this circuit. Only incandescent lamps...
For reference only, this is the first IF amplifier stage of a common transistor radio from the...
This notch filter was found in National Semiconductor documentation from the 1980s. Operational...