Found in an old English publication, this circuit applies to the 240 V network, but can be changed to lower voltages. Transistors are mostly general-purpose, admitting modern equivalents.
This traditional oscillator circuit that can be found elsewhere in this section uses general...
With NAB equalization we found this circuit in an English documentation from 1967. The transistors used...
This circuit was found in Radio Electronics magazine from June 1963. The range is small and the...