A Simple Telegraph Key
by Arthur R. Nilson, McGraw-Hill, New York, 1942
A professional looking radio key can be made by the beginner or experimenter at a cost of a few cents for parts. This key is very satisfactory in every respect, as will be seen from Fig. 15. It is made of a short piece of 1-inch-square brass rod and a few other parts easily procurable. Its construction is clearly shown in the mechanical drawings, Fig. 16. As exact dimensions are shown in the drawings, no difficulty should be experienced in making this key.