Homebrew semi-automatic bug
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.