Hello,
I thought it was useful add here some words from Ted:
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THE FOLLOWING IS A SUMMARY: The test report shows there were 15 measurements
at various distances out to 10 miles from the antenna on each of 6 radials.
Then the data is plotted to show that there is some directivity due to local
interference (power lines). Finally, a RMS value of all data points presents
a value of 0.4 dB less than the standard AM Broadcast antenna. That value is
then used in the News Release and plotted on a curve to show that even
though the center of the EH antenna is at 0.1 wavelengths, the radiation is
only 0.4 dB less than a standard 1/4 wavelength tower with 120 radials. The
curve also shows that if the center of the EH Antenna is raised to 1/4
wavelength, the radiation from it would exceed that from the standard tower
by more than 2 dB.

For the AM Broadcaster, the primary benefit is that he can have an antenna
that does not require any ground. He can even locate the antenna on top a
building. We are currently developing a free standing antenna that will only
require enough ground for a base. The end user (the Broadcaster) has no
interest in the latest technology, he only wants to make money. For those
that have a station, in most cases he can sell the land his antenna is now
on, install an EH Antenna on a small plot, then sell the existing land and
put money in his pocket. For those that want to build a new station, the
land cost has been prohibitive - until now.

Ted
"stefano" ha scritto nel messaggio
...
Hello,

After sometime ,I am here again to inform all the Om community interested
about the last news on the EH antenna.
The antenna was tested, following the FCC rules ,by Stu Graham a important
broadcasting engineer.
For any news and to read any data on it (including the complete report
from
the consultant) please go he
http://www.eh-antenna.com/AM_Broadcast.htm

Please read all the docs related.

Three years ago I put on this forum a special announce about this
important
discovery.
Now we can publish all the evidences we were right.
There is no doubt, the so called "EH mode " is real and alive.
During the test the antenna was installed at about 1/10 of a wavelenght .
On this position alomst equalled (only -0.4 db) a perfect 1/4 standard
tower
with 120 radials.
The real important feature is we can trade height for gain.
When the antenna is installed at 1/4 wav. it shows a 2.5 db of gain ( yes
,
GAIN for a ground wave over a standard tower)

very high efficiency
very large bandwidth
very compact size

For the ham applications a new era is approaching. Antennas on 40, 80 or
160
metres are very small on size, showing the same or better efficiency over
a
standard full size vertical dipole.

I wanted just share this great news with all interested people.
My best 73's
Stefano IK5IIR