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Old February 6th 11, 06:25 PM posted to rec.radio.shortwave
dave dave is offline
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First recorded activity by RadioBanter: Jan 2009
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Default 60 Foot Random Wire Shortwave [SWL] Antenna ?

On 02/06/2011 09:08 AM, bpnjensen wrote:
On Feb 6, 2:14 am, wrote:
On Feb 5, 2:32 pm, wrote:









On Feb 5, 12:55 pm, wrote:


On Feb 4, 10:05 pm, wrote:


2-5-2011, GUATEMALA, R. Verdad (tent), 4052.5 AM, very weak SS,
apparent conversation, SINPO 15231. Not sure what they are using for
a TX now, but fair signal.


- Bruce Jensen, CA, USA


"CA" is a big place north to south
"SF Bay Area, CA, USA" would be nicer )
.
- R75& 60 foot random wire


BpnJ is this "60 foot random wire" your
newly built Shortwave [SWL] Antenna ?
-or- an older existing Shortwave Antenna ?


? I thought it was an Inverted "L" Antenna !
-not-just-a- Straight Horizontal 'Flat' Wire Antenna ?


*IF* the newly built SWL Antenna is
an Inverted "L" Antenna ?


How many Feet in the Up-Vertical-Leg ?
-and- How many Feet in the Out-Horizontal-Arm ?
=Total= Combined Feet of the Antenna Wire
+Plus+ The general 'Lay' {Direction} of the Horizontal
Antenna Wire from the the Up-Vertical-Leg out to the
Far-End of the Out-Horizontal-Arm : N& NE& E& SE
& S& SW& W& NW& N


iwtk ~ RHF
.
.


- It's the new one. Well, yes, that's right, an inverted L. The
- vertical is about 30 feet, the horizontal about 60. Oriented nearly
- north-south (not checked with a compass), far end is south.
Guatemala
- is off the forward left side if you looking the direction the
antenna
- is aimed.

BpnJ,

'The Antenna's Size' is "The Antenna's Size" : A Fixed Point
-how-ever- as the Frequency Varies for 500 kHs to 1 MHz
to 2 MHz to 4 MHz to 8 MHz to 16 MHz to 32 MHz
the Propagation Characteristics of the Antenna ~change~
So having the Vertical-Up-Leg as your Starting Reference
Point and your Far-End as your End-Point should/would
allow you to have an Idea {Hunch} about the Receiving
Properties of your Fixed Size Antenna on any given
High {Shortwave} Frequency [HF].
.
.
- How much does the 30 vertical do for you, other than
- collect vertically polarized QRM?

How better to get to your 60 Foot Out-Horizontal-Arm
1/3rd Omni-Direction Vertical Antenna
+plus+
2/3rds Off-the-Sides Horizontal Antenna*
-and- 45 Degree Out-from-the-Sides Horizontal Antenna*
-and- Off-the-End Horizontal Antenna*
* Depending on the Frequency
.
- The only reason, really, I built it this way was to
- allow the 9:1 antenna unun to be mounted near
- ground (the ground is not in place yet, but will be
- soon). Otherwise, I would have put the whole thing
- up high, or possibly sloped with the unun end down.

Close to the Ground is 'good'.
.
- This morning (1800z onward), the VOA relays from
- MDG and BOT (Africa) on 16 and 19 meters were
- coming in almost like locals.
-
- Bruce

Strong Signals and less noise is good too ) ~ RHF
.
.


Actually, isn't the directionality of a wire along it's axis? That's
how the PAR end-fed SWL antenna is, according to Dale...


That is a very complicated subject. Usually a wire close to the ground
has a pattern between a kaleidoscope and a butterfly on acid. Seriously,
like a butterfly more often than not, with various lobes and nulls
depending on the frequency.