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Contents of journal 18
December 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 6.7MB)
  Individual articles may be available below
- Contents. (This is a bit-map scan).
-
- A Directory of Cave Radio Designs
- Mike Bedford summarises some of the better-known designs of cave radio.
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- Cave Radio - the Next Generation
- David Gibson looks at some factors which may prevent progress on the next generation of cave radio and suggests how a new design may come into being.
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- Speech Communications at 27kHz FM
- Stuart France describes the design philosophy of his experimental FM cave radio, and gives some advice to budding cave radio designers. David Gibson gives some technical background to Stuart's design.
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- An Advanced Method of Speech Clipping
- Bill Purvis introduces some experiments he has been carrying out on a Sun workstation.
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- Licence-free Home-construction of Induction Radio Equipment
- Is it possible to have a design type approved and then allow individuals to home construct units? David Gibson investigates.
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- Type Approval News
- The latest information, reported by David Gibson.
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- Broadening our Horizons
- Mike Bedford and David Gibson suggest some new applications of electronics to caving and urge us all to broaden our horizons.
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- Sites for Testing Cave Radios at Depth
- David Gibson considers which British caves will present the biggest challenge for testing new radios.
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- Designing an SSB Transmitter Module
- David Gibson outlines his thoughts for producing a basic type approved SSB module which could form the basis of new cave radios.
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- Update on Cave Data Logging
- David Gibson reports on the progress of the project outlined in Journal 11.
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- Reviews
- David Gibson reviews some recent articles on earth-current communications and data-logging.
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- Experiments with Earth Current
- Some suggestions for experimental work by Nigel Lovell.
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- Experiments with Audio Bandwidth Reduction
- Rob Gill has been experimenting with some low cost chips to effect a bandwidth reduction for speech.
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- Update
- David Gibson updates recent articles on Earth Current communications, NiCd Charger/Conditioner, Caver Counter.
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undertaking charitable activities on behalf of the BCA.
BCRA publishes a range of periodicals and books.
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