HeyPhone
Cave Rescue
Communication
System
In 2001, 50 HeyPhone sets were issued to the UK's cave rescue groups.
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January 2007: The HeyPhone documentation on this site derives, for the most part, from material produced during the period 2002-2004. Although still largely correct, documentation may go out-of-date with respect to corrections, obsolete components, updated techniques and peripheral apparatus. Please note: the HeyPhone project is not actively supported by CREG. CREG has no brochures, no circuit boards, no components and no built units for sale. The HeyPhone is entirely a "build-it-yourself" project. The only support available is the documentation on this web site, and any "public" help you may receive in response to posting a message to the CREG discussion forum. Update: May 2018: It is now 17 years since the original HeyPhone was produced; designed and constructed for the UK Cave Rescue Groups by John Hey, who died in 2016. The HeyPhone was a pioneering development in Cave Radio, but it can no longer be recommended for construction. The information is archived here, on this web site, for posterity (or, at least, for a while) but you are advised to seek a more modern design. Several significant products have been developed, (e.g. Système Nicola, Cave-Link) but these are semi-commercial products, and not available for home construction. One strong contender for a 'homer' to replace the original HeyPhone has to be Ian Cooper's Micro HeyPhone, which was described in the CREG Journal in 2017. To view a list of CREG Journal search results for Micro Heyphone, click on the link below... |
