[Lowfer] [lowfrequency] Cave Communications Using LF Frequencies

[Paul Daulton]

Some years ago I came across a site on cave communicaation using 73 khz, 
there was a 73 khz phasing type ssb tranceiver. I adthink the guys call 
themselves "troglytes" or something similar.
Paul k5wms
----- Original Message ----- 
From: "Mike.WE0H" <we0h at gmx.com>
To: "Lowfer" <lowfer at mailman.qth.net>
Sent: Friday, February 26, 2010 12:38 PM
Subject: [Lowfer] [lowfrequency] Cave Communications Using LF Frequencies


> Bootleg LF operations or what???
>
> Mike
> WE0H
>
>
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>
> -------- Original Message --------
> Subject: [lowfrequency] Cave Communications Using LF Frequencies
> Date: Fri, 26 Feb 2010 18:23:25 -0000
> From: Adam E <gccengineering at yahoo.com>
> Reply-To: lowfrequency at yahoogroups.com
> To: lowfrequency at yahoogroups.com
>
>
>
>
>
>
> I was reading an article while I was looking around for radio projects
> for long wave, and I came across this article about a teenager who was
> said to be an inventor of something that people thought it could not be
> done. He used a huge loop antenna with a 2 way LF radio, probably not
> FCC approved or licensed, not part 15 to transmit a text signal deep in
> the holes of the Earth at 1000 feet. Main thing is that how did he get
> rights to text on LF when he is not licensed by the FCC, is he using the
> 160 kHz to 190 kHz band to send the signals back and forth? Or is he
> using VLF communications? I thought this might interest some long wave
> radio hobbyists and techs, and engineers. There is no project or
> schematic for this, so this maybe something he probably is used a dot
> matrix display to do it. Is there a text data project out there that
> uses a lowfers transmitter? Lets just hope he gets his FCC experimenters
> license and patents applied. Now I feel that there is more to be
> discovered today in digital LW technology.
>
> http://www.npr.org/templates/story/story.php?storyId=123116417
> <http://www.npr.org/templates/story/story.php?storyId=123116417>
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