CREG Journal (ISSN 1361-4800)

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Contents of journal 16
June 1994

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CREG Journal Archive:
This issue is available on paper as part of a two-volume archive, covering issues 1 to 25. To purchase it, please visit Lulu.com.

CREG Journal (PDF 7.7MB)        Individual articles may be available below
Contents. (This is a bit-map scan).
 
A Toroidal Loop Antenna
Part 2 of David Gibson's series on driving an untuned loop antenna.
 
The Trogbox
Chris Trayner describes a general purpose housing for use with electronic equipment underground.
 
Water Tracing with VLF Radio
Is it possible to design a VLF radio which can be dropped into a sump and tracked from the surface? David Gibson shows how the theory is applied to this problem.
 
Locating Cavities Using Microgravity Techniques
David Gibson reviews an article in Mine & Quarry.
 
A More Accurate Dipole Field Pattern
David Gibson suggests that previously published field patterns have been misleading and presents the new improved version.
 
AM Radio Reception in Caves
A review of a discussion which appeared in The Texas Caver. Review by David Gibson.
 
Single and 2-wire Phones on the Same Cable
Nigel Lovell responds to a letter on this subject by reference to his own recent design.
 
Questionnaire for Rescue Groups
Mike Bedford reports on requirements for new cave radio equipment.
 
Accuracy of Ultrasonic & Optical Rangefinders
Henry Lyall comments on David Gibson's article in Journal 6.
 
Alkaline Cell Failure
David Gibson reviews and expands on an article in Speleonics 17.
 
Earth Current Signalling in White Scar
Steve Clark shows how this neglected technique can produce some impressive results.
 
The Caves of Thunder Radios
Gavin Newman shows how CB radios were taken apart and rebuilt inside helmets to give hands-free communication on an expedition to Irian Jaya.
 
Wet & Dry
In our regular column on making equipment cave-proof, David Gibson explains some of the thoughts behind his choice of components for his 2-way earth return telephone.
 
A High Performance Flashgun Slave
An update on David Gibson's design.
 

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