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Contents of journal 14
December 1993
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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 5.9MB)
  Individual articles may be available below
- Contents. (This is a bit-map scan).
-
- Update
- Flashgun slave, VLF licensing.
-
- Practical Earth Return Telephone Design
- In part 2, Nigel Lovell presents constructional details of the unit introduced in the last issue.
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- Inductaphones and Conductaphones
- Steve Clark summarises the three systems of cave communication he has experimented with.
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- Theoretical Considerations for a Low Noise Pre-amp
- Comment on David Gibson's article by Derek Potter.
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- Earth Current Communications
- Comment on Nigel Lovell's article by Derek Potter.
-
- Designing a Low-noise Receiver Pre-amp
- David Gibson summarises the signal/noise and reception range equations and gives some worked examples.
-
- Flashgun Slaves for Flashbulbs
- David Gibson gives a circuit for adapting slave units to work with bulbs, and Steve Clark gives a design for a slave unit.
-
- Introduction to Radio Location
- In the final instalment of our series for those new to cave communication, Mike Bedford brings radio location under the spotlight.
-
- FX2s and PVC Drain Pipe
- Nigel Lovell describes the construction of a low cost FX2 style lamp.
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- Penetration of Magnetic Fields Underground
- In this, the third part of our 'optimum frequency' series, David Gibson derives graphs of s/n ratio against frequency for various rock conductivities.
-
- Expected Values of Atmospheric Radio Noise
- John Rabson presents the figures, and David Gibson gives some guidance on how to use them.
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undertaking charitable activities on behalf of the BCA.
BCRA publishes a range of periodicals and books.
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