Re: longitudinal waves

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

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

Dave: one form of ground antenna is two probes in the ground spaced to
direct the range of broadcast.There is no air antenna that is equivelent.
   Robert  H 

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Fri, 08 Mar 2002 15:27:36 -0700
> To: tesla-at-pupman-dot-com
> Subject: RE: longitudinal waves
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Fri, 8 Mar 2002 15:28:48 -0700
> 
> 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
> 
> 
>