CREG Journal (ISSN 1361-4800)

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Contents of journal 23
March 1996

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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 7.9MB)        Individual articles may be available below
Contents. (This is a bit-map scan).
 
Update - Type Approval of Modules
David Gibson reports on the latest from the Radiocommunications Agency.
 
Literature Received
The Design of Broadband VLF Receivers, an Italian article on bat detectors and a French article about an electronic clinometer with laser pointer.
 
The Autumn Field Meeting
A report by Guy Tomlinson.
 
Review - Underground Photographer
Mike Bedford reviews our publication on cave photography.
 
Electronic Aids for Photographers
David Gibson reports on a discussion held at the Autumn 95 CREG field meeting.
 
An Improved Circuit for Firing Flashbulbs
David Gibson's design allows slaves to be used more reliably with flashbulbs, and provides an indication that the flashbulb is correctly seated.
 
The Mogannwg Lamp
Practical design for a low-cost lamp by Kevin Munn.
 
Cave Radio Design - 27kHz FM
Constructional details of a 27kHz FM cave radio by Stuart France.
 
Radio in a Box
Kym ap Rhys describes experiments with professional VHF hand-helds underground.
 
A Slave for RALF: part 2
Some further notes on construction, by David Gibson.
 
Optimal Charging of NiCd Cells
Mike Bedford investigates fast charging of NiCds and outlines the concept of optimal charging.
 
Earth Current / Induction Field Experiments part 4
Rob Gill describes work with circular polarisation.
 
Cheap LED Emergency Flashlight
Brian Pease describes how high-brightness LEDs can be used for illumination. Mike Bedford lists some UK sources.
 
Design Considerations for Caver Pagers
Chris Trayner describes the concept of caver pagers.
 
Progress on Caver Pagers
Chris Trayner introduces four projects on caver pagers. The students then outline their progress to date.
 
The G3TDZ Loop
Following construction details of the transceiver in the last Journal, John Hey gives loop details.
 
3496Hz Beacon Transmitter & Loop
Brian Pease provides constructional details of a 3496kHz beacon for radio location.
 
Electronics in Cave Surveying
David Gibson reviews the uses of electronic instrumentation for surveying and navigation in caves.
 
Review: Electronic Compass Modules
David Gibson lists a range of components and modules useful for the design of electronic compass / clinometers.
 

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