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The UK-based Cave Radio & Electronics Group (CREG) is probably the world's leading organisation of its kind. Its aims are "to encourage the development and use of radio communication and other electronic and computer equipment in caving and related activities". It was established in 1987 and, in 2011 celebrated its 25th year and its 75th published journal. Its followers includes cavers, radio amateurs, electronic engineers and professional & industrial organisations.
To achieve its aims, the Cave Radio Group aims to publish a regular Journal (ISSN 1361-4800) which provides a forum for people to discuss ideas and to exchange information. It occasionally produces other publications, and organises field meetings. CREG's main role is one of information gathering and dissemination, but it also has some items of equipment for hire.
|Cave Radio & Electronics Group|
| Information about the
Follow this link for further information about the Group: CREG journal, field meetings, the CREG award, equipment hire. Following a re-organisation at its 2007 AGM, CREG is longer an organisation with "members". CREG is merely the name given to the loose affiliation of BCRA members who have an interest in its activities. Its journal continues to be available on subscription to anyone who is interested, whether or not they are a BCRA member.
| The CREG
The Cave Radio Group publishes a quarterly Journal (ISSN 1361-4800) which provides a forum for people to discuss ideas and to exchange information. A list of contents of CREG journals is available on this site and, from 1 January 2013, online access is available. A searchable index is now available as part of BCRA's Science Index. Our Bibliography of Underground Communications and CREG Journal Digest are now out of print and out-of-date and there are currently no plans for new editions.
| Cave Technology
BCRA's Special Interest Groups organise an annual Cave Technology Symposium. All areas of cave technology including surveying, data logging, communication, digging, cave detection, photography, lighting and explosives are covered, and there are often field trips and workshop sessions as part of the weekend event. For details of the latest event, please see the CREG News Forum. Proceedings of previous events can be found here.
| The CREG News
Its often very quiet, but the forum at bcra.org.uk/cregf is available for disucssion on CREG topics or to read online articles posted by members. Also see the CREG-Announce e-list at list.bcra.org.uk.
Additional contact points are listed in our journal but, for general enquiries, please use one of the above addresses. Contact details for other BCRA SIGs are listed on the BCRA contacts page.
|Subscriptions & Back-issues caves.org.uk/payments/creg/|
| HeyPhone heyphone.org.uk (local copy)
The HeyPhone was designed by John Hey with the support of the CREG. Technically, it is a standard design of single-sideband radio, usually operating at 87kHz USB. Although it can be used with tuned induction loop antennas, it is usually operated with earthed electrodes separated by 25m to 100m. This technique of current-injection into the earth re-creates the trench communications of the First World War, but the transmission range is enhanced by the use of the 87kHz carrier in the LF band.
| Speleonics caves.org/section/commelect/
Speleonics is the publication of the Communications & Electronics Section of the USA-based National Speleological Society (NSS). The web site has past issues of the magazine, and a list of links to other cave electronics sites, but the main activity of the Section is to operate an Internet discussion group via a mailing list. The Speleonics mailing list is not (currently) mentioned on the above web page; subscription requests should be made to lists.altadena.net/mailman/listinfo/speleonics.
|Web Pages of CREG Members|
|David Gibson (Cave
(Flashgun Slave Unit) caves.org.uk/flash
Dr David Gibson has a degree in mathematics and engineering from Cambridge University, and a PhD in "Cave Radio" from the University of Leeds. He currently works in the research and consultancy department of the UK's Mines Rescue Service. David has been involved with CREG since its inception, and is the technical editor of its journal. His Cave Radio page contains information about books he has published on cave radio and radiolocation, and links to other cave radio sites. In addition, his Slave Unit page describes the construction of a flashgun slave unit for cave photography, which is compatible with digital cameras.
Luc is the developer of the Auriga Palm OS cave survey freeware designed for in-cave use as a smart and faithful survey notebook. With the Palm enclosed in a write-through protective pouch, data input is quick and easy; and a serial or Bluetooth link is available to connect existing electronic data acquisition devices. As the survey goes, Auriga displays the line plot in graphical form, reports statistics, helps spot and fix survey errors and assists in sketching to scale.This flexible field tool can also be used on the surface to display cave networks and to correlate its data with a GPS, connected or not. With monthly releases, Auriga evolves rapidly, and keeps gaining adepts in expeditions worldwide.
Martin's cave-electronics projects include the Radon and Scurion LED headlights and the Auriga electronic cave surveying project. The web site describes these and includes many other articles on cave electronics. There is also a link to Peter Ludwig's Web Watch, which appears in the CREG journal. The Radon caving headlight is housed in a rugged waterproof aluminium case and utilises a 3W Luxeon LED. It has five brightness settings, is microprocessor controlled, does not drain the batteries when switched off and can be powered from a wide range of voltages. See below for further LED lamp resources.
Dr Graham Naylor is the designer of the Système Nicola cave radio that operates on 87kHz USB with earth-current electrodes. Graham's web site described the construction of the radio, which is compatible with the Heyphone, but has been designed to be easier to manufacture. The site include a link to a commercial company that is able to manufacture the radio to order. The web site also gives updates on a new digital communication system for through-rock transmissions, which Graham is working on. Update: the above web page may no longer exist. Further information on Système Nicola is at nicola.sssi.fr.
Brian Pease has designed a radiolocation beacon that uses a phase-locked loop to achieve a narrow bandwidth and greater range. His web site describes this and many associated experiments with radiolcoation equipment. Also see Brian's LED lamp.
|Cave Radio Resources|
|For through-rock radio systems suitable for cavers, try the
|LED Lamp Resources|
|For further information about LED lamps, try the following links|
British Cave Research Association (UK
registered charity 267828). Registered Office: The Old Methodist Chapel, Great
Hucklow, BUXTON, SK17 8RG
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This page, http://bcra.org.uk/creg/index.html was last modified on Thu, 05 Dec 2013 11:29:58 +0000