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Contents of journal 36 June 1999
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- CREG Journal
(PDF 10.9MB) Individual articles may be available below
- Contents
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- Caving Lamps - a New Generation (part two)
- Chris Vernon's LED caving lamp gives 7 hours' light for a battery drain of 2W. All the electronics are contained within the lamp housing, and it includes a built-in fast charger and helmet-mounted battery pack. Circuit diagram, PCB layout and constructional information are included in this article.
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- Ground Penetrating Radar at Poole's Cavern
- Ground penetrating radar shows considerable promise at finding new cave passages. Rod Eddies describes his work at Poole's Cavern and illustrates some exciting new discoveries.
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- Electronica Mexican
- In the first of an occasional series about cave electronics abroad, Stuart France jumps on a mule to discover Duracell's market penetration of the Mexican jungle and explores Tottenham Court Road in downtown Mexico City.
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- A Dual Frequency Loop for the CB LF Transverter
- Virtually all cave radios have been single frequency designs but the CB transverter approach offers a multi-channel capability. Mike Roos describes the design and tuning of a dual frequency loop.
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- Web Watch
- Lighting is the main subject this time in Peter Ludwig's regular review of Web sites.
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- Selected Further Reading
- If you are interested in the topics covered in this issue, then this list of 'further reading' from past CREG journals, compiled by David Gibson, may be of use to you.
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- Rescue Communications Field Meeting
- This March, in a break from our usual pattern of field meetings, CREG held a meeting specifically to demonstrate and discuss cave rescue communications; Steve Laugher reports.
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- Speleonics
- Recent topics included a discussion of Laser Surveying Devices. Review by Jeremy Davis.
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- White LEDs for Emergency Lighting
- Nigel Lovell describes an easy-to-build emergency lamp using four white LEDs. It is field-tested by Steve Laugher.
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- A Mini Cave Radio
- John Hey provides circuit details of his latest cave radio. This improves on the performance of previous designs and is housed in a smaller case.
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- The Role of the Cave Radio and Electronic Group
- Richard Rushton. CREG's new chairman offers his views on the role of the group within the caving community.
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- PIC a Cave Radio - Microcontrollers at LF
- Stuart France explains how cave radios can make use of PIC micro-controllers to generate the transmitted frequency, audio tones and control the user interface.
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- Wet & Dry
- Richard Rushton describes his experiments with adhesive tape seals.
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- Letters to the Editor
- Feedback, debate, information & news - our readers have their say. Letters on Radio-location & dowsing, Portable soldering irons, Loan equipment, PICs, New lighting regulator, Stereo tech-nique for interference reduction, Wet & Dry, and Bryan Ellis.
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