[Lowfer] VLF towers

[Andy - KU4XR]

Joe:

Most all commercial towers have a radial system either the same
length as the tower is high, or just slightly longer. If you 
will notice in the tower on the left, a shadow is cast by the
sunlight. The shadow extends almost to the edge of the radials.
The shadow on the tower to the right is harder to see, but it
also extends almost to the edge of the radials. Both of these
are typical tower installations. Here's some interesting info;

24.8 kHz ( NLK ) 250 KW A U.S. Navy communication station located 
at Jim Creek, Washington. It uses a Continental Electronics Corp. transmitter and a horizontal wire transmitting antenna strung 
between two mountain tops. 

73 and have a good day :::


Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 185.29866 KHz ( QRSS-60 )
Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
http://www.myspace.com/beaconxr
http://webpages.charter.net/ku4xr/


--- On Tue, 12/8/09, Idle-Tyme <nss at mwt.net> wrote:

> From: Idle-Tyme <nss at mwt.net>
> Subject: Re: [Lowfer] On 14.9 KHz lots of TV crud
> To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
> Date: Tuesday, December 8, 2009, 9:03 AM
> Neat Picture,  except the radial
> system seems far too short.  Yeah  I 
> know they don't "HAVE" to be 1/4 wave when ground
> mounted.  but 
> shouldn't they even be close to that long,  and that's
> obviously far 
> from a few miles long that they would need to be.
> 
> Joe WB9SBD
> 
> *The Original Rolling Ball Clock
> http://www.idle-tyme.com*
> 
> 
> 
> Johan H. Bodin wrote:
> > Joe,
> >
> > they use vertical antennas and, while they are short
> in terms of
> > wavelength, they are quite efficient since those guys
> can afford
> > next-to-perfect ground screens. Example from Iceland:
> >
> > http://maps.google.com/maps?t=h&hl=sv&ie=UTF8&ll=63.849957,-22.456441&spn=0.014734,0.055747&z=15
> >
> > 73
> > Johan SM6LKM
> >
> > Idle-Tyme wrote:
> >   
> >> What do stations like these use for antennas?
> >>
> >> I can't even imagine what a 1/2 wave diploe would
> be lengthwise.
> >>
> >> And any vertical would be horrid in efficient
> because no matter how tall 
> >> it is, it's gotta be incredibly short for the
> freq.
> >>
> >> Joe WB9SBD
> >>     
> >
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