[aprssig] APRS in caves! (mammoth map) & HF test result

[Steve Noskowicz]

Dave,

  I'll scan trhose links, but...
  Bob has been in contact with an experienced "Radio Caver", Paul R. Jorgenson KE7HR.  You can get some idea about his knowledge in the newsletters, such as this one:
   http://www.caves.org/section/commelect/splncs/splncs27.pdf

Located here:
  http://www.caves.org/section/commelect/drupal/speleonics 

73, Steve, K9DCI  

--- Dave B wrote:
> Bob..
> No need to re-invent the wheel...
> 
> Google "Cave Radio".  It's all been done to death many time, and with 
> great success.  Mostly voice, but some digital too.
> 
> http://bcra.org.uk/creg/#radio
> http://www.scavalon.be/avalonuk/technical/radio1.htm
> http://caves.org.uk/radio/
> http://radiolocation.tripod.com/
> 
> and there are more of course.
> 
> You guys have too many restrictions on what you can do over there, re 
> modulation scheems etc I think.
> 
> Plus the way HF is open these days, you'll probalby suffer mutual QRM 
> with oher HF users above ground, even if you use QRP.
> 
> 73.. Dave G0WBX.