This simple Morse Code oscillator was found in a 1980s American documentation. The power supply should be powered with 5V and the integrated can be the 7400.
Found in an American amateur radio documentation by the name of “antennascope” this circuit is...
In the figure we have the way to use a common multimeter as a field strength meter. RF shock...
Molex is using the FFC / FPC Premo-Flex jumpers for inter-board and inter-plate interconnects...