Found in a 1969s American documentation, this circuit uses transistors from that time. The configuration can be adapted to use modern equivalent components.
We found this transmitter in 1980s documentation. Coil data is found next to the diagram and...
The 4528 is a dual-retriggerable monostable that needs only the timing network formed by R and C...
This circuit for analog TV was found in a 90s EDN. The integrated circuits used are from that time...