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.
In the figure we have the suggestion of coupling an audio oscillator to monitor the CW...
This filter for scratch and rumble noises that occur on turntables was found in the February 1995...
This circuit was found in an American documentation from 1970. We can increase the number of...