This 1 MHz oscillator was found in an Electronics World of 1969. The circuit uses a general-purpose FET and the output circuit must be resonant at the generated frequency.
This circuit was found in a 1969 Mullard publication. The transistor may be the modern equivalent...
This circuit uses an operational like to the 741 having been found in a 2001 documentation. The...
Found in English documentation, this timer produces an audio signal at the end of the timing. The...