The impetus came from amateurs who want to experiment with LF communications through rock into caves. Activity is not limited to cave communications, however, and any Class A licensee will be able to use up to 1 Watt ERP with any suitable mode.
These Web pages were written in the days following this announcement, but are no longer maintained. They are kept here as reference material only.
© 1996, 1997 Richard Lamont, 1998 Brian Carling