This circuit uses currently uncommon components, including the 10.7 MHz (FI) filter. This circuit was found in Motorola's 1990 Linear Databook.
This circuit from a 90s Electronics Now, uses a 4010 gate as a signal amplifier. The circuit...
This good timer using only transistors was obtained in a 2003 documentation. The circuit has 6...
This circuit was found in old documentation, but the setting applies to any operational. Resistors...