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Old April 22nd 08, 05:04 AM posted to rec.radio.shortwave
Telamon Telamon is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 4,494
Default Multi-Element Inverted "L" Antenna Using an ICE-180 Matching Transformer

In article
,
RHF wrote:

On Apr 20, 6:41*pm, "Dale Parfitt" wrote:
"RHF" wrote in message


SNIP

NOTE : For the sake of this discussion all Four of the
Inverted "L" Antenna Elements are co-aligned in the
same Vertical Plane.


Why? You going to build this? Well, it can't be built.

The ICE 180 Matching Transformer 'acts' as the Collection
Point for each of the Signals coming from the Four 'individual'
Wire Antenna Elements.


Do you understand that these signals are vectors with magnitude and
phase not just magnitude? That is a rhetorical question don't answer it.

In this instance the Four Taps on the Antenna Side of the
ICE 180 Matching Transformer 'act' as a Summing Network.
The Output of which is fed {transferred} to the Coax Cable
Side of the ICE 180 Matching Transformer.

Each of the Wire Antenna Elements is 'separated' in Space.
15.1 Feet & 19.7 Feet & 24.5 Feet & 38.5 Feet
Deltas : 4.6 Feet & 4.8 Feet & 14 Feet = 23.4 Feet

Each of the Wire Antenna Elements is a 'different' Length
-wrt- Wave Length; and therefore 'unique' to itself.
39.6 Feet & 51.5 Feet & 63 Feet & 97.7 Feet

Collectively All of the Wire Antenna Elements add-up-to
More Wire In-the-Air and a Greater Signal Capture Area.


Not necessarily.

More Wire In-the-Air :
39.6 Feet + 51.5 Feet + 63 Feet + 97.7 Feet = 251.8 Feet Long

Greater Signal Capture Area :
300 Tap "L" by itself : 15.1 x 24.5 / 2 = 185 Sq. Ft.
450 Tap "L" by itself : 19.7 x 31.8 / 2 = 313 Sq. Ft.
600 Tap "L" by itself : 24.5 x 38.5 / 2 = 472 Sq. Ft.
800 Tap "L" by itself : 38.5 x 59.2 / 2 = 1140 Sq. Ft.
Collective Areas : 2110 Sq. Ft. filled with Four Wire Antenna
Elements versus anyone of the single Elements.


Where did this idea come from? It makes no sense.

The wire impedance is determined by its diameter and height above
ground. This aspect of a single wire is independent of the frequency of
operation but nearly any other aspect is dependent on frequency.

Summary :
All of this is not 'scientific' but simply a practical approach
to puting : More Wire In-the-Air by using a specific feature
of the ICE 180 Matching Transfromer : The Taps.


It doesn't work that way. You could add a wire to another and have less
signal or more signal.

yes - i know that 'in-theory' i am wrong
-but- practically speaking i am . . .
sort-of kind-of right - iane ~ RHF
.


No you are just wrong.

--
Telamon
Ventura, California