This file is not intended to be read by humans. Please go to the formatted index

# format auto-updated on access: Mon 27-Nov-2017 11:29:54 +01:00

CREG Journal
Contents. (This is a bit-map scan).

The South Wales Field Meeting
Stuart France introduces the theme of Journal 17 - the recent field meeting in South Wales.

VHF/UHF Radio in Ogof Ffynnon Ddu
Results of the latest experiments, described by John Rabson.

The Greensites Resistivity Meter
Following his demonstration at the field meeting, Neil Weymouth describes his rig for mapping caves by earth resistance tomography.

Earth Return Telephones - Is a Good Connection Needed?
Steve Laugher and Nigel Lovell describe some experiments carried out at the field meeting and makes some practical suggestions.

GB4CRO - The World's First Underground Amateur Radio Station
Jack Procter describes how a group of radio amateurs set up a station in White Scar Cave.

An Introduction to Earth current Communication
David Gibson provides some theory to back up Steve Clark's article in Journal 16.

An Ergonomic Loop Antenna
Mike Bedford describes the mechanical design for a more user friendly loop, and encourages designers to consider such issues in next generation cave radios.

Ferrite Rods as Transmitting Antennas
Part 2 of David Gibson's series, held over from Journal 16.

Transverter Modifications for UK's CB 27/81 CB Rigs
Ian Drummond describes how to modify his cave radio transverters to work with British CBs.

A Radio Locator for the Trogbox
Chris Trayner describes a simple device to aid the location of monitoring/data-logging equipment which may have been left underground.

Forthcoming Changes to Induction Radio Licence Specifications
David Gibson describes the new ETSI 300 330 specification.

A 200J Flashgun
David Gibson describes his experimental 200J flashgun and discusses the features that could be incorporated into a finished product.