As a ham, you've probably wondered how to get a "sky hook" to hold up your antenna.  Lighter-than-air balloons are one solution - for temporary installations in calm conditions.

• A Skyhook for the '90s 
  QST May 1997, pp. 31-33
  A technique for using large advertising balloons to hold up your Field Day antenna.
• Balloon Skyhooks 
  QST August 1997, p. 69
  Technical Correspondence comments on the above article.

ANTENNA SYSTEM WITH SKY-DOC™
Hurricane force winds capable balloon