Spirit bottle cap CW key

By OH6DC



Too much alcohol is bad for health and CW skills. Therefore it is maybe advisable to only buy spirit for using the bottle as a telegraph key. (Use the liquid inside for cleaning the contacts of your other CW keys.) Follow these modification instructions:




Attach two strips of aluminium tape to bottle threads. Then connect the keying wires by using a cable tie around the bottle neck.




For improved keying performance, aluminium tape should be added inside the cap (right side) as well as a piece of insulation tape (left side).




Backside view. Not much "cleaning liquid" left.



Bottle cap keying demonstration here:


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