1979 June      QST                                     p. 19
               An Accurate, Low-Cost Antenna Elevation 
               System

     September QST                                     p. 24
               A Radio-Compass Antenna-Elevation 
               Indicator

1980 June      QST                                     p. 21
               Computer-Operated Rotator-Control 
               Interface

1983 January   QST                                     p. 17
               Automatic Control for the Alliance      3 pages
               HD-73 Heavy-Duty Rotator

1986 September QST                                     p. 40
               An Automatic Rotator Controller         7 pages

1991 February  QST                                     p. 30
               Rugged Side-Mounting for Rotatable Antennas