Thread: true or... ?
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Old September 4th 09, 07:48 PM posted to rec.radio.amateur.antenna
Richard Clark Richard Clark is offline
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Default true or... ?

On Fri, 4 Sep 2009 19:03:02 +0200, "-.-. --.-" wrote:

Thanks for reply, Richard.
Take also into account that, although i don't know much mathematic, i don't
have any doubt that is impossible that this kind of antenna can have a great
or also medium efficiency.


Hi OM,

Efficiency in percent (%) is simple math: 100 * PowerOut/PowerIn

In decibels, I won't show the math, I will give some example:
100% is 0dB
95% is -0.22dB
90% is -0.46dB
80% is -0.97dB
50% is -3dB
10% is -10dB

Look at your S-Meter. If any station added 5% efficiency, going from
95% to 100%, then your S-Meter would shift 0.22dB. The needle of your
S-Meter is probably more than 1dB thick when you look at it. The
needle would then move 1/5th of its thickness when a station adds 5%
efficiency.

Considering your 1/4 wave AM broadcast antenna example, is not an accident
that nor military nor broadcast installations used in the past a type of
antenna like the EH/HZ...
... and military brains have knowledges that we in the "civilian" world can
use maybe after 20-30 years.


I have been in the military - antennas work the same there too. I was
a teacher of RF Systems (LF/MF/HF/VHF/UHF/SHF). There is no magic
knowledge hidden by the government.

And, if this really works, one don't waste time writing PDF. He start
working in radio with this antenna, and if the antenna is *really* what he
claim, he will be in a very short time a rich man.


A very short time needs to be defined. This "antenna" has been around
for a long time and no one has gotten rich (and the buyers have lost
money, time, and signal).

Anyone can write a useless PDF. Anyone can get a useless patent too.
I have observed patent holders who post here that have forgotten their
own patent numbers, their own patent claims, their own URLs, their own
email addresses, and their own theory. Talk about a waste of time,
but it is wasted with the vigor of a seven year old. It would seem
that wasting time, money, and signal power was equivalent to earning a
PhD in Einsteinomics and advanced Gaussology.

73's
Richard Clark, KB7QHC