Homebrew semi-automatic bug

by OH6DC




Two distant cousins: a Vibroplex Champion and a homebrew bug.




High quality piece of Morse code art & technology. Manufactured in 1967 in the USA. Bought from an internet auction in 2006.




The challenger. Homebrew with low tech tools & cheap materials in 2007.




A hacksaw blade is used for the shaft/pendulum. Ordinary screws act as contacts and adjustments.




Alligator clip's position determines the dot speed.



Which bug is the winner? See & hear the video clips below and judge for yourself.




Update: Yet another challenger to the Vibroplex has been born. See my Lego bug.