Homebrew Bugs by WB9LPU

      This set of pages shows the different designs of semi-automatic keys that have been designed and built over the years.  It is semi-historical and tries to show the progression of the designs over time.  [The  (*) articles linked below describe some of the development.]


Early Designs of Semi-Automatic Bugs  (*)

Further Development of Semi-Automatic Bugs - The PaddleBugConcept   (*)

Development of Fully-Automatic Bugs - Dual Pendulum  (*)

Development of the RotoBug Concept - PDF #1  (*)

Development of the RotoBug Concept - PDF #2  (*)

Development of Fully-Automatic Bugs - Single Pendlum 

 

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The Early Bugs 

     These initial attempts were made to investigate the feasibility of using permanent magnets to carry out some of the operations previously done mechanically.

 

The PaddleBugs

   This series refined the basic mechanisms and led to a key that could be either a semi-automatic bug or an iambic paddle.


The DoubleBugs

    These are essentially two complete bugs on one frame.  The over-and-under arrangement is unlike that in other fully-auto bugs.



The RotoBugs

     This is a new concept in bug design.  It incorporates features worked out while making the PaddleBugs, and its design has contributed to changes in the PaddleBugs