[Elecraft] OT - The HeyPhone

[Mike Furrey]

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 <kevinr at 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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