Found in American documentation from 1968, this circuit has an acute cut-off of the frequency to which it is tuned and which depends on RC. Transistors may be modern equivalents of general use.
The values of the components in this experimental circuit are those of the previous circuit. The...
The experimental musical instrument with the LM3909 is suggested by National Semiconductor in...
With the values of the components indicated, the circuit generates a 1 kHz signal. The power...