Found in an Electronic Design from 1968 this circuit generates a linear sawtooth signal modulated by an input signal. The transistors are from the era.
This oscillator produces an audible signal on a piezoelectric transducer. The frequency is...
This circuit, from a 1998 documentation, allows to obtain more power for the radios and amplifiers of...
This medium wave radio must use a high impedance piezoelectric, crystal or magnetic phone and the...