Re: Antenna Theory

On Wed, 13 Sep 2006 11:57:28 +0000, Felix
<Felix.2e2x5y@xxxxxxxxxxxxxxxxxxxx> wrote:

Dan, N3OX, please no flames. That is not the correct style here ...

You are criticising by error, or by ignorance.

Hi Felix,

Given your statements that follow, it appears that Dan IS criticizing
about error and about ignorance:

I did the measuring of the efficiency by feeding the RoomCap antenna
with 1 KW HF,
havinga VSWR below 1,1

Your claims are based on very thin technical knowledge - and your lack
of experience shows. VSWR is not an indication of efficiency - far
from it. I seriously doubt you know how to measure the V of VSWR.
Your meter measures power, not V. Your understanding of the SWR
versus efficiency relationship also reveals a lack of basic
understanding. For small antennas, low SWR can be solid proof of high
inefficiency. The simple fact of the matter is that no small antenna
presents a load that is remotely close to any standard transmitter's
output Z, nor any commercial transmission line.

I fully expect you will attempt to claim matching solves this. When
you do attempt that, we will clear up your lack of experience there
too.

and the result: Less than 70 W heat is produced
by the
antenna, and, as energy can not be destroyed, 930 W was radiated by the
antenna.

In fact, you do not prove you measured 10W heat, nor 20W heat, nor 40W
heat, nor "less than 70W heat." You cannot even prove you radiated
930W watts. There are methods to "prove" these claims, and you don't
show any knowledge of those basic principles. Relying on one
definition (poorly extracted from a text) is not sufficient. It may
qualify for sales, but this is not a sales group and you are not going
to find customers here with your poor quality of discussion.

This leaves us with one question: "What do you expect to achieve
here?"

73's
Richard Clark, KB7QHC
.

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