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Contents of journal 32
June 1998
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- CREG Journal
(PDF 8.9MB)
  Individual articles may be available below
- Contents
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- A Charger for Gelled Electrolyte Lead-acid Batteries
- Despite the fact that they've been eclipsed by NiCd, NiMH and Li-ion cells in laptop PCs and cell phones, lead-acid batteries are still used by cave electronics enthusiasts. John Hey considers their advantages and provides a charger design.
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- Surface Radio - Communication for Expeditions (part 2)
- Mike Bedford concludes his two-part series on expedition radio by looking at the characteristics and construction of various antennas and at licensing issues.
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- Cave Radio Notebook
- Edited by David Gibson - 29: The Thirds Rule for Radiolocation. 30: Experiments with Ground Electrodes. 31: ICs for Amplitude Modulation. 32: Fields from a Grounded Wire.
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- Photographers & CREGies Unite
- Mike Bedford, Richard Rushton and others report on the recent field meeting held jointly by CREG and cave photography enthusiasts.
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- LF Through-rock Induction - the Broader Picture
- David Gibson describes some of the commercial uses of ground-penetrating radio, based on a presentation he gave at the Radio Solutions conference in October 1997.
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- A Transformer for Earth Current Communications
- Rob Gill describes the construction of a matching transformer used for earth current experiments.
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- Web Watch
- Peter Ludwig lists some more web sites to visit. David Gibson continues his review of Usenet, and brings us up to date with the Speleonics mailing list.
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- Notes from our French Correspondent
- Jean Jacques Fauchez, the prolific French designer of cave radios, he shares his experiences as a series of notes and diagrams. Topics covered include his new Cournouze radio, earth electrodes, frequency choice, and geology. Translated by Rosy and John Rabson.
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- Wet & Dry
- Drying out wet equipment, rugged laptops, ruggedness of switch covers and a test procedure for caving equipment. Column edited by Richard Rushton.
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- Anatomy of a Student Project
- A number of students worked on cave electronics-related projects during the previous two academic years. Guy Tomlinson, describes his experiences.
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- Underground Radio Tests on the Nene Valley Railway
- Accidents happen in railway tunnels so effective communication is necessary says John Rabson. Tests are described with additional contributions from Rob Gill, Chris Trayner and Roger Goodchild.
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- Roger, Kirk Out
- Chris Trayner tells the story of his first underground operation on the new European LF amateur band at 136kHz.
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- Letters to the Editor
- Feedback, debate, information & news - our readers have their say.
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the British Caving Association,
undertaking charitable activities on behalf of the BCA.
BCRA publishes a range of periodicals and books.
Click here for further information.
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