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Contents of journal 12
June 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 8.8MB)
  Individual articles may be available below
- Contents. (This is a bit-map scan).
-
- Update
- Updates on recent articles: Flashgun Slave, Laser Rangefinder, Electronic compass & Clinometer.
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- Theoretical Considerations for a Low Noise Pre-amp
- David Gibson considers this, the most critical stage of a cave radio receiver.
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- A New Technique for Speech Signal Enhancement
- David Gibson reports on a new technique which claims a 20dB increase in s/n ratio using a microprocessor.
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- VLF Transverter for CB Radio
- Ian Drummond outlines his design a low cost alternative to a custom built cave radio.
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- An Electronic Cave Surveying Instrument
- Compass, clinometer and rangefinder combined - Mark McLean presents the basic principles.
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- The State of Cave Surveyors
- David Gibson offers an opinion in the latest episode in this ongoing saga.
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- Waterproof Housings & Components
- Housings, connectors, switches and indicators come under the spotlight in this, the first of a new series, by David Gibson.
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- Loop Antenna Construction
- In our cover feature, David Gibson suggests some novel alternatives to loop construction.
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- Circuit Simulation using PSPICE
- Keith Jackson describes how to prototype your circuit without even building it.
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- The Optimal Design of a Cave Radio
- Notes based on David Gibson's talk at last year's BCRA conference.
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- Which is the Best Frequency for Cave Radios?
- Following Mike Bedford's look at the spectrum, David Gibson discusses some theoretical points.
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- An Introduction to Induction Cave Radio
- In the second of our series for newcomers to cave radio we take a look at the principles of inductive communication.
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- A NiCd Charger and Conditioner
- David Gibson discusses a possible practical design.
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- A Solar Powered Battery Charger
- Reprint of a Maxim application note & circuit.
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BCRA is a UK registered charity and is a constituent body of
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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