We found this circuit in a 1967 IEEE documentation. The circuit uses discrete components of the time based on the 1.13 MHz frequency used with oscilloscopes at the time.
This circuit can generate signals in the range from 1 to 20 kHz, depending on the crystal. The...
This circuit was found in the May 1989 issue of Radio Electronics magazine. The components can be...
This interesting circuit found in a European publication from the 1990s eliminates the voice that...