As an avid caver (ham radio got me into caving 50 years ago ... another story)
here are a couple of links to what hams have done underground. The big
drawbacks are cost and hauling the gear. Currently a group is investigating
using the family radios for digipeating. http://aprs.org/cave-link.html
... and in Arizona http://ke7hr.com/caveradio/80meterhfunderground.pdf
73, Mike WA5POK
On Friday, July 13, 2018 7:43 PM, kevinr <kev...@coho.net> wrote:
Thanks Bill,
Most of my caving was done in the Black Hills. Pringle Cave was
great fun. Twenty foot soda straws, boxwork, popcorn, and a variety of
helictites. Some caving in Wisconsin too.
73,
Kevin. KD5ONS
On 07/13/2018 04:32 PM, Bill Frantz wrote:
> For those that might be interested in further information about
> underground radio communications, the National Speleological Society's
> Communication and Electronics section has placed back issues of its
> publication online for free down load at:
>
> <http://caves.org/section/commelect/drupal/speleonics>
>
> Some of the European radios have had problems in the US because they
> are sensitive to the harmonics of our 60 Hz power.
>
> 73 Bill AE6JV
>
> -----------------------------------------------------------------------
> Bill Frantz | When an old person dies, a | Periwinkle
> (408)356-8506 | library burns. - Joe McGawon | 16345 Englewood Ave
> www.pwpconsult.com | Irish Ethnographer | Los Gatos, CA 95032
>
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