RE: longitudinal waves

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>

Hi Dave,

> One Assumes such waves ought to exist (....) at all freqs, and other freqs
and sources are easier to work with...

They do exist at all frequencies.  Every EM wave is associated with a
longitudinal and a rotational wave.  I can't imagine how it could happen any
other way.

> >       There is a whole class of nearground and underground antennas,
>>        for specialized applications in electromagnetic and radio
>>        work.

I know there are underground antennas.  As you mentioned, they are ELF
related.  But I'm not aware of any antenna structures designed to work
directly off the ground.

Today I did the calculation for the longitudinal experiment I proposed.  The
long wires need only be about 4.25 inches apart to pick up the target I have
set at 1390KHz.  I've surveyed my yard.  I should be able to lay two 100
foot wires 8.5" apart on the ground and oriented in the direction of the
broadcast antenna to receive the waves.  The weather is looking good so I
may be able to do this within the next week or so.

Dave