Search found 3 matches

by speleoluc
Sat 11 Jul 2015 12:03
Forum: Cave Radio & Electronics
Topic: Surface-cave communication while moving underground
Replies: 4
Views: 8125

Re: Surface-cave communication while moving underground

What kind of earth return do SWT need? I guess hand-body-rubber boots don't make a proper contact. Is a trailing wire enough, or must a spike be used? The passage I'm thinking about is water-washed bare rock. Yes, Michael Lake's e-mail address is welcome. -- Luc Le Blanc http://www.speleo.qc.ca/Auriga
by speleoluc
Fri 26 Jun 2015 19:05
Forum: Cave Radio & Electronics
Topic: Surface-cave communication while moving underground
Replies: 4
Views: 8125

Surface-cave communication while moving underground

Following negotiations between local authorities and a private hydroelectric powerhouse operator, at mid-August, throughput will be augmented in order to lower the water level in the artificial reservoir that happens to feed a glacio-tectonic cave that runs under city houses. The drying out of this ...