XTAL oscillator with fine tuning (CB22403E)

We found this circuit in an old English documentation. The integrated circuit is of a specific type of the time.

16 W Audio Amplifier Using the TDA1520 (CB444)
Powering from a 36 V supply this circuit has a power output of 16 W in 4 ohm loads. With 40 V and...
Operational and Transistors Symmetric Power Supply (CB14885E)
With this circuit it is possible to have a symmetrical source from a simple source with voltages from...
Temperature Controller (CB6017E)
This circuit is from a factory documentation (National Semiconductor) of the 80's. The power...