Hi
I was wondering if anybody had tried one of these.
Watson Miller SW Antenna
http://www.radioworld.co.uk/~radio/c...f9ac7ab286fbca

I was thinking of getting one.
thanks
vangellis

In message , vangellis
writes
Hi
I was wondering if anybody had tried one of these.
Watson Miller SW Antenna
http://www.radioworld.co.uk/~radio/c...g-antenna-30mh
z-passive-p-4085.html?osCsid=ba1bff9be9f92c719ff9ac7ab286fbca

I was thinking of getting one.
thanks
vangellis


It looks sort-of like a VHF 'Slim Jim' / 'J-Pole' (but it can't be, can
it?). I suspect that this part of the description is very true -
"Totally passive, there is also no risk of receiver overload".
--
Ian

On Mar 31, 5:55*pm, Ian Jackson
wrote:
In message , vangellis
writesHi
I was wondering if anybody had tried one of these.
Watson Miller SW Antenna
http://www.radioworld.co.uk/~radio/c...g-antenna-30mh
z-passive-p-4085.html?osCsid=ba1bff9be9f92c719ff9ac7ab286fbca

I was thinking of getting one.
thanks
vangellis

It looks sort-of like a VHF 'Slim Jim' / 'J-Pole' (but it can't be, can
it?). I suspect that this part of the description is very true -
"Totally passive, there is also no risk of receiver overload".
--
Ian

I used to switch between a G5RV (a horizontal dipole over 100' long)
and a J-pole for 2 meters (a vertical about 8' long). Under some
conditions the short vertical outperformed the long horizontal - could
be due to the elevation angle or maybe the azimuth of the desired
signal favouring its radiation pattern and vice versa. Also could be
due to one pattern discriminating better against unwanted signals and
noise. The small antenna's diminishing efficiency at lower frequencies
is an advantage as it helps to prevent receiver overload by strong
signals at these frequencies. Getting such an antenna up as high as
possible and as far away as possible from local interference sources
and connecting it to the radio via shielded cable can result in a
pretty decent SW antenna. If you still have a VHF-TV antenna on your
roof, you might be surprised at how well it may work as a SW antenna.
Or take your radio up on the roof and see how much better reception is
with its little telescoping antenna than on the ground floor.

Tom

In article ,
"vangellis" wrote:

Hi
I was wondering if anybody had tried one of these.
Watson Miller SW Antenna
http://www.radioworld.co.uk/~radio/c...nna-30mhz-pass
ive-p-4085.html?osCsid=ba1bff9be9f92c719ff9ac7ab286fbca

I was thinking of getting one.
thanks

Looks like a vertical folded dipole that is too small for SW.

--
Telamon
Ventura, California

Vangellis,

Here is the KISAP {Keep It Simple And Practical} Evaluation
of the Watson-Miller Shortwave {Listener} (SWL) Receiving
{Only} Antenna

Watson-Miller Shortwave {Listener} Receiving {Only Antenna
1.8 - 30MHz (Small Vertical Passive SW Antenna)
WM SWL ANTENNA - http://tinyurl.com/2g2hqx

NOTE - Watson Miller makes several Antennas for Scanners
and VHF and UHF usage
http://www.wsplc.com/acatalog/Watson..._Antennas.html
http://www.wsplc.com/acatalog/Watson..._Antennas.html
http://www.wsplc.com/acatalog/Watson..._Antennas.html
+ Plus Watson does make some HF Wire Antennas
http://www.wsplc.com/acatalog/WATSON..._Antennas.html
Mostly for the Amateur Radio Bands -but-
SWL-DXDL Watson Long Wire + MLB Antenna Kit
SWL-DX1 Watson SWL Long Wire Antenna Kit
WA-103 Broadband T2FD Antenna 7-30 MHz
WDP-30 Watson 1~30 MHz Receiving Dipole including Coax Feeder
Watson-Miller SW Receiving Antenna 1.8 - 30MHz (Passive)

Evaluation of the Watson-Miller Shortwave {Listener} (SWL) Receiving
{Only} Antenna : Visual Examination and Review
of the Written Description.

Start by taking a look at the Photos and Reading the Info
presented : Here is what I 'think' can be reasonably said
about the Watson-Miller Shortwave {Listener} (SWL)
Receiving {Only} Antenna.
WM SWL ANT - http://www.wsplc.com/pages/pdf/miller.pdf

1 - Designed to be Broad-Banded for the Shortwave Bands
Frequency Coverage 1.8 MHz to 30 MHz.

2 - Passive Antenna Element 'appears' to be Made of Bent
Aluminum Tubing. Estimate 3/8 Inch Diameter and
Approximately 12 Feet Long with 3 Inches of separation
between the parallel tubes.

NOTE - Bent to resemble an Off-Center Folded Dipole
{Skinny Loop "Balance"} Antenna -but- IT IS NOT.
-why- Claims to use "End Loading System"
http://www.wsplc.com/pages/pdf/miller.pdf

3 - I believe that the Black Tube part is simply a PVC Pipe
Stiffener to Secure and Hold the Two Ends in Place.

3 - Uses a Balun to 'match' the Bent Antenna Element to an
SO-239 Socket for connection to a 50 Ohm Coax Cable
feed-in-line.

NOTE - Most likely using the word "Balun" cause it sells
when what they have is a Matching Transformer (UnUn).
"with Built-in Magnetic Long Wire Balun"
"the very latest High Quality Magnetic Long Wire Balun"
http://www.wsplc.com/pages/pdf/miller.pdf

4 - Height = Two Metres (2m) ~ 6 Feet 6 3/4 Inches
[ ~ 78.74 Inches ]

DO-THE-MATH : Double the 78.74 Inches to 157.5 Inches
and Subtract 13.5 Inches = 144 Inches = 12 Feet of Aluminum
3/8 Inch Tubing.

5 - Length of the Antenna Element : 12 Feet

WHAT YOU "GET" PRACTICALLY SPEAKING :
[Shortwave Radio Bands 60m ~ 19m : 5 MHz ~ 15 MHz]

1 - Start with a normal size Whip Antenna found on most
'portable' AM/FM Shortwave Radios : The Whip Antenna
is about 36 Inches long {3 Feet} with a 1/4" Base Diameter
and an 1/8" End Diameter having an Average Diameter
of 3/16".

The Watson-Miller Shortwave {Listener} (SWL) Receiving
{Only} Antenna [WM SWL Antenna] is 12 Feet with an
Average Diameter of 3/8"
Result : The Antenna Element is Four Times [12 to 3] as
Long and Twice the Diameter [ 3/8" to 3/16"] with an
RF Signal Area of 170" to 21" which is Eight Times
as large as the Whip Antenna.
Improvement Equals = 4X + 2X + 8X

2 - The Signal Capture Area of the Whip Antenna can
crudely be estimated at 36" x 1" for 36 Square Inches.
WM SWL Antenna's Signal Capture Area can be estimated
at 72" x 3" for 216 Square Inches.
Result : The Signal Capture Area improves by Six Times
[216 to 36].
Improvement Equals = 6X

3 - The Whip Antenna is located on the Radio and inside the House/
Building where the RF Signal is often much weaker
and the Man-Made Environment is saturated with the RFI
and EMF that is there.
WM SWL Antenna is located outside the House/Building
where the RF Signal is often much Stronger and away from
the Man-Made Environment inside the structure; so it is
not saturated with the RFI and EMF.
Result : The Antenna Element receives at lest Two Times
[2 to 1] the RF Signal and Half the RFI and EMF [1 to 2]
giving at least a 4 to 1 Improvement in the relative
Signal-to-Noise Ratio coming into the Radio.
Improvement Equals = 4X

4 - The Radio's Whip Antenna is an e-Probe type of Antenna
Electrically Short and smaller that a Tenth (1/10) of a
Wave-Length for the Shortwave Radio Bands.
* Most Radio's Whip Antennas are 'passive' but some are Active.
* Most Radio's Whip Antennas are 'un-tuned' but some are Tuned {Pre-
Selected}.
WM SWL Antenna is a Passive and Un-Tuned e-Probe also
-but- It is Matched to the Antenna Feed-in-Line with an UnUn
type of Matching Transformer; which also helps to de-couple
the Antenna Element from the Feed-in-Line and the Man-Made Noise from
within the Structure.
Result : The Improved Performance with the WM SWL Antenna.
Improvement Equals = 1X

SUMMARY : Adding Up the "X"s
4X + 2X + +8X 6X + 4X +1X = 25X
Then Divide-by-Ten for a 2.5 S-Unit Improvement in the
relative 'Merit' of the Watson-Miller Shortwave {Listener}
(SWL) Receiving {Only} Antenna over the normal Radio's
Whip Antenna.

COMPARISON TO AN INVERTED "L" ANTENNA :
The previously mentioned Radio's Whip Antenna to a Par
EF-SWL Antenna configured as an Inverted "L" Antenna
located outside with a 15 Foot Vertical-Up-Leg and a
30 Foot Horizontal-Out-Arm.
http://www.parelectronics.com/swl_end.htm
http://www.grove-ent.com/ANT8.html
http://www.universal-radio.com/catalog/sw_ant/2205.html
PAR EFL-SWL Antenna, and Inverted-L Antenna Questions
http://groups.google.com/group/rec.r...11c0ac4f084b87
http://groups.google.com/group/rec.r...2ff595de9fea91

1 - Wire Antenna Element is 45 Feet Long by 1/8" Diameter
with an RF Signal Area of 212" to 21" which is Ten Times
as large as the Whip Antenna.
Improvement Equals = 15X - 1.5X + 10X
2 - The Signal Capture Area of the Wire Antenna Element
can crudely be estimated at 540" x 1" for 540 Square Inches.
Improvement Equals = 15X
3 - Wire Antenna Element is Outside versus Inside
Improvement Equals = 4X
4 - Par EF-SWL Antenna is a Passive and Un-Tuned Random
Wire Antenna Element -but- It is Matched to the Antenna
Feed-in-Line with an UnUn type of Matching Transformer;
which also helps to de-couple the Antenna Element from
the Feed-in-Line and the Man-Made Noise from within
the Structure. Plus It is 'configured as an Inverted "L"
Antenna with a Ground Rod at the Base.
Improvement Equals = 2X

SUMMARY : Adding Up the "X"s
15X -1.5X + 10X +15X + 4X +2X = 44.5X
Then Divide-by-Ten for a 4.45 S-Unit Improvement in the
relative 'Merit' of the Par EF-SWL Antenna over the normal
Radio's Whip Antenna.

COMPARISON : Comparing the Par EF-SWL Antenna
to the Watson-Miller Shortwave {Listener} (SWL)
Receiving {Only} Antenna would show on average of a
Two (2) S-Unit Improvement in the relative 'Merit'.


and that is the way i 'see' and 'read' it - iane ~ RHF {pomkia}

Dahhhh,,,, Boolsheeit.Watson Miller doesn't sound like much to me.I can
stick a wire on one of my naked girlfriend's arses and pick up much
better than that.
cuhulin

On Apr 12, 2:53*pm, wrote:
-
- Dahhhh,,,, Boolsheeit.
- Watson Miller doesn't sound like much to me.
- I can stick a wire on one of my naked girlfriend's
- arses and pick up much better than that.
- cuhulin
-

Cuhulin - She must have a Mighty Wide Ass ! ) ~ RHF
-ps- Maybe you should try a Dyke-Pole Antenna ;-}

Do-It-Yourself -alternative-to-the- Watson-Miller Shortwave
{Listener} (SWL) Receiving {Only} Antenna

# 1 - Start with a 1/4 WL 10 Metre / CB 102" Whip Antenna

# 2 - Use a 9:1 Matching Transformer* {UnUn}
* Grounded directly to the Top-Rail near the top.

# 3 - Connected to a Coax Cable feed-in-line to the
Matching Transformer.

# 4 - Whip Antenna is mounted on a 21 Foot piece of Top-Rail*
* A Single free-standing piece of Metal Pipe with 2~3 Feet
in the ground** using a larger metal pipe sleave or Concrete
Post-Hole Anckor.
** Locate the Base of the Top-Rail at least 25 Feet away
from the House and other structures.

# 5 - Eight Foot (8-Ft.) Ground Rod at the base of the
Top-Rail with short heavy Ground Strap directly to the
Top-Rail. The whole piece of Top Rail is Grounded.

# 6 - Fifty to 100 Feet of Coax Cable feed-in-line connected
from the Matching Transformer to the Radio / Receiver.


about as simple and basic as it gets - iane ~ RHF {pomkia}

I have to watch Mississippi Outdoors on Radio tb now.Turkey Hunting in
Newton County, Bass Fishing in Smith County and Bow Hunting in Hinds
County.Melvin Tingle is the host.
cuhulin

On Apr 12, 12:43 pm, RHF wrote:
-
- Here is the KISAP {Keep It Simple And Practical} Evaluation
- of the Watson-Miller Shortwave {Listener} (SWL) Receiving
- {Only} Antenna
-
- Watson-Miller Shortwave {Listener} Receiving {Only Antenna
- 1.8 - 30MHz (Small Vertical Passive SW Antenna)
- WM SWL ANTENNA -http://tinyurl.com/2g2hqx

Do-It-Yourself "Alternative" # 2 to the Watson-Miller
Shortwave {Listener} (SWL) Receiving {Only} Antenna

Still working on a Home Brewed Sort-of-Look-a-Like Antenna
using Copper Tubing and a PVC Pipe Mast Support; along
with a 9:1 Matching Transformer and Coax Cable feed-in-line.

It's a Work-in-Progress with two false starts {Whoops}

The 1/4" Copper Pipe ~ 15 Feet Long Antenna Element
comes from a Icemaker Water Supply Installation Kit
http://frigidaire.stores.yahoo.net/unicemakinki1.html
http://www.lowes.com/lowes/lkn?actio...=53757-131-813

Ten Foot Piece of PVC Pipe Upper-Mast
[ Antenna Element Shape Support ]

Attempting to get a 6" Radius Top And Bottom

RF Junkie 9:1 SWL-1 Long-Wire Feeder [ Matching
Transformer ] with So-239 to "F" Adapter

RG-6 Quad-Shield Coax Cable feed-in-line 50~100 Feet.

21-Foot piece of Top-Rail for the Bottom Mast
[ Free-Standing with a Ground Anchor ]

The Fold-Up and repeated problem so far has been
'forming' the 1/4" Copper Tubing Antrenna Element
with the Straight Parallel Runs and the Six-Inch
Radius at the Top and Bottom.

A Plastic Chop-Stick is being used to Fill the 3" Gap
between the Two Ends of the the "C" and hold them
in 'fixed' Alignment with the other parallel run.

Still have not figured-out whether to use the Top-End
of the "C" Gap or the Bottom-End as the Feed-Point.

? Any Suggestions as to Which and Why ?

yes - i like play with antenna projects - iane ~ RHF {pomkia}