ABOUT - "Omni" {Non} Directional Vertical Active Antennas
RHF
ABOUT - "Omni" {Non} Directional Vertical Active Antennas
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/6549
Here is a List of a Few commercial Active Antennas that use
a Short (Small) Vertical Antenna as the Antenna Element.
* Sony AN-1 Active Antenna
- Coverage 150 kHz to 30 MHz
http://www.universal-radio.com/catalog/sw_ant/2206.html
Uses a 59 Inch Vertical Antenna Element but works well
with an 104" CB Whip Antenna.
* DX Engineering ARAV-1P Active Receive Antenna
Vertical Configuration
- Coverage 100 kHz to 30 MHz
DXE-ARAV-1P => http://tinyurl.com/9pcya
SOURCE => http://www.dxengineering.com/
Uses a 102 Inch Vertical Antenna Element
* North County Active Antenna {Kit}
- Coverage 100 kHz to 30 MHz
http://www.northcountryradio.com/Kitpages/actant.htm
Uses a 24 Inch (12"-48") Vertical Antenna Element
* Dressler ARA60S Active Antenna
- Coverage 40 kHz to 30 MHz
http://www.universal-radio.com/catalog/sw_ant/4061.html
Uses a 36 Inch Vertical Antenna Element
* RF Systems DX-10 Professional
- Coverage 35 kHz to 35 MHz
http://www.universal-radio.com/catalog/sw_ant/2868.html
Uses a 52 Inch Vertical Antenna {Helical} Element
* McKay Dymek DA-100E Active Antenna
- Coverage 500 kHz to 30 MHz
http://www.universal-radio.com/catalog/sw_ant/0328.html
Uses a 56 Inch Vertical Antenna Element
* MFJ-1024 Shortwave Active Outdoor Antenna
- Coverage 50 kHz to 30 MHz
http://www.mfjenterprises.com/products.php?prodid=MFJ-1024
http://www.universal-radio.com/catalog/sw_ant/1132.html
Uses a 54 Inch Vertical Antenna Element
* LF Engineering H-800 SkyMatch Active Antenna
- Coverage 10 kHz to 50 MHz
http://www.grove-ent.com/ANT15.html
Uses a 26 Inch Vertical Antenna Element
* RF Systems DX-One Professional MkII Omni-Directional
Active Vertical Receiving Antenna
- Coverage 20 kHz to 60 MHz
http://www.universal-radio.com/catalog/sw_ant/1246.html
Uses a 47 Inch High Multi-Element Antenna
* LF Engineering H-900 Gain Probe Antenna
- Coverage 10 kHz to 60 MHz
http://www.grove-ent.com/h900.html
Uses a 25 Inch Vertical Antenna Element
* Watson AKD-HAA Active Antenna
- Coverage 30 kHz to 30 MHz
http://www.wsplc.com/acatalog/Active_antennas.html
Uses a 16.5 Inch Vertical Antenna Element
* Naval Electronics PR-430
- Coverage 100 kHz to 30 Mhz
http://www.naval.com/430/
Uses a 39 Inch Vertical Antenna Element
Note - Active AM/MF-SW/HF-FM Receiving Antenna VPA 30
http://www.naval.com/vpa.htm
http://www.naval.com/active-antenna.htm
Note - RF Systems MTA is a Non-Amplified Vertical Receiving
Antenna - Coverage 500 kHz to 30 MHz
http://www.universal-radio.com/catalog/sw_ant/3368.html
Uses a 84 Inch (Seven Foot) Vertical Antenna Element uses
'passive' Magnetic Transfer Technology vice an Amplifier.
READ - Vertical Mono-Pole Receiving Antenna for HF
http://entropy.brneurosci.org/antenna.html
Vertical Wire Antenna Element + UnUn + and MFJ-959
Check-Out - AMANDX Presents Pre-Built Antenna
http://www.angelfire.com/mb/amandx/recant.html
Below is a Listing by Company of Commercially Produced Antennas
that make help your listening. There are many types of Antennas
and they may or may not suit your location or listening habits.
Active Receiving Antennas
- Source - Ian Purdie's Electronic and Radio Tutorial Pages
http://my.integritynet.com.au/purdic/activeantenna1.htm
http://www.electronics-tutorials.com/antennas/antennas.htm
Consider now some Theoretical Basics where we might compare
a One Metre Long Whip Antenna with a Standard Quarter Wave
Antenna in the Amateur 40 Metre Band.
READ - Two Remote Active Antennas {Updated)
http://home.comcast.net/~markwa1ion/exaol1/rl1rw1.pdf
RL-1 Remotely-Tuned Loop Antenna and RW-1 Remotely-Tuned Whip Antenna -
by Mark Connelly [WA1ION] 04 JUN 1996
Check-Out - Active Antenna Circuits - Discover Circuits .Com
http://www.discovercircuits.com/A/antenna.htm
Take-A-Look-At - Circuits for the Hobbyist - by VA3AVR
http://www.uoguelph.ca/~antoon/circ/circuits.htm
Active Antenna for AM-FM-SW
http://www.uoguelph.ca/~antoon/circ/activant.html
Active Antenna AA7 for HF-VHF-UHF - by Fred Blechman
http://www.uoguelph.ca/~antoon/circ/activant2.html
http://www.ramseyelectronics.com/downloads/manuals/AA7.pdf
READ - Basic Antennas for Experimenters
http://www.northcountryradio.com/PDFs/column005.pdf
as always more than you wanted to know - iane ~ RHF
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Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Все Радушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio для Aнтенн SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
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= = = = = Translation = = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
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RHF
WCD - You sound like a Happy LFE Customer :o) ~ RHF
ABOUT - LF Engineering - "Omni" {Non} Directional Vertical Active
Antennas
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/6560
+ Long Wave / Longwave (LW) = Low Frequency (LF)
+ Medium Wave (MW) = AM Broadcast Band (BCB)
+ Short Wave / Shortwave (SW) = High Frequency (HF)
LF Engineering Active Vertical Antennas are Made-in-the-USA :o)
LFE => http://www.lfengineering.com/
- LF Engineering Products -
http://www.lfengineering.com/products.htm
http://www.lfengineering.com/pdf/brochure.pdf
* H-800 SkyMatch LF/MF/HF Active Antenna
http://www.lfengineering.com/pdf/H800inst.pdf
* M-601C AM BC Active Antenna
http://www.lfengineering.com/pdf/m601c_is.pdf
http://www.lfengineering.com/pdf/loop_dtl.pdf
http://www.lfengineering.com/pdf/M-601C.pdf
http://www.lfengineering.com/pdf/AC-600.pdf
http://www.lfengineering.com/pdf/Audio%20Magazine%20M-601.pdf
- Grove Enterprises -
* H-900 GainProbe LF/MF/HF Active Antenna
http://www.grove-ent.com/h900.html
http://www.lfengineering.com/pdf/H900inst.pdf
iane ~ RHF
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= = = In Shortwave-...@yahoogroups.com,
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/6554
= = = "W. Curt Deegan" <WWWR@e...> wrote:
Excellent list, thank you.
While you mention two models from LF Engineering, you did not
include the M-601C, possibly because it is an AM BCB only active
vertical. I have it and the H-800 which you did include, and use
them phased together to great advantage on the MW band, for
both the directional characteristics achieved and to reduce ambient
noise, especially during daytime.
There are also the L-400B LF/VLF active vertical, and the L-111
-- which I have -- that combines the L-400B with an up-converter
for tuning in the 4.0-4.5MHz range. LF/MF/HF and LF/VLF marine
versions are also produced by LFE.
Except for the H-900 -- an enhancement to the H-800, both of
which are still in production -- all of these active verticals are
available directly from LF Engineering. Because of some
marketing arrangement, the H-900 while an LFE product, is
only available for order through Grove, as well as the H-800
as you mentioned.
The LF Engineering web site is at:
http://www.lfengineering.com/products.htm
(For the record, I am unaffiliated in any way with LF Engineering.)
Following hurricane Wilma, I picked up the three LFE verticals
from my yard and patio, placed them and the Christmas tree
stands on which they are mounted back on the flat roof from
which they had been unceremoniously removed, and turned
them on, all was back in business without a hitch. I've been
very happy with these LFE active verticals, both for their antenna
performance and their weather resiliency.
Curt
W. Curt Deegan
Boca Raton, (Southeast) Florida
RHF
The Secret to most of these Small Vertical Active Antennas seems
to be Location and Placement of the Active Antenna Element.
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/6561
OUT-AWAY-AND ABOVE :
Out from the House or Building by 15-25 Feet or more away from
the House's RFI/EMF Fields and Man Made Noise.
Away from any exterior sources of RFI/EMF by 15-25 Feet or more.
- Other Buildings, Lighting and Power Lines.
Above the Roof and Up and Away from the House's RFI/EMF Fields
and Man Made Noise by 15-25 Feet or more.
Any combination of : 15 to 25 Feet Out, Away and Above will work.
10 Feet Out and 15 Feet Up is 25 Feet Away
15 Feet Out and 10 Feet Up is 25 Feet Away
One Foot Out and 14 Feet Up is 15 Feet Away
Three Feet Out and 21 Feet Up is 24 Feet Away
30 Feet Out and 5 Feet Up is 35 Feet Away
25 Feet Out and 25 Feet Up is 50 Feet Away
TIP - With the Coax Cable Feed-in-Line Attached.
Use a 50 100 Foot piece of Nylon-Poly Rope and
starting in the 1/3 the Length of the Rope. Tie a
Clove Hitch at the Base; with a Clove Hitch in the
Middle; and a Clove Hitch at the Top of the Active
Antenna Element. Leaving 1/3 of the Rope at the
Bottom and 2/3 of the Rope at the Tope. Rig the
Rope over a Tree Limb so that the Vertical Antenna
is about 3-5 Feet from the Limb and the Rope Falls
directly to the Ground with a Stake in the Ground to
Secure the Bottom Ends of the Rope.
hope this helps - iane ~ RHF
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RHF
With one of the LF Engineering Vertical Active Antennas
sometimes a Slinky Junior (Jr.) can be use with good effect.
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/6563
HOW TO :
Place the Slinky Jr. over the Antenna Element and Secure
the Bottom of the Slinky Jr. to the Bottom of the Antenna.
* Two to Three Plastic Wire Ties will do the job.
* Attach a piece of Fish Line or Mason Line to the Top
of the Slinky Jr. and Rig it to a Higher Object/Structure
above the LF Engineering Vertical Active Antenna.
- OR - Lay the LF Engineering Vertical Active Antenna on it's
Side Horizontal [Flat] and Rig the Slinky Jr. as a Horizontal
[Flat] Antenna (Mini-Random-Wire / Micro-Long-Wire).
Now - Extend the Top of the Slinky Jr. so that it is Stretched-Out
about Four Feet Overall and try your Radio Reception for improvement
with the LF Engineering Vertical Active Antenna.
Next - Extend the Top of the Slinky Jr. so that it is Stretched-Out
about Six Feet Overall and try your Radio Reception for improvement
with the LF Engineering Vertical Active Antenna.
Continue to Stretch-Out the Slinky Jr. Two Feet at a Time until
you notice Signal Overloading and Images with the LF Engineering
Vertical Active Antenna.
= Four Feet ( 4' ) = Minimum
= Six Feet ( 6' )
= Eight Feet ( 8' )
= Ten Feet ( 10' )
= Twelve Feet ( 12' ) = Maximum
NOTE - The Slinky Jr. {Junior} which has about 85 Turns with a
Diameter of 1 7/8 Inches and a Circumference of 5.89 Inches
for a Total Wire Length of "41.7" Feet.
* Optimum "Stretched-Out" Length about 13.3 Feet
Once Again - Sometimes this works in getting that 'little extra out'
of the LF Engineering Vertical Active Antenna; and sometimes it
is a case study in Signal Overload using and Active Antenna.
try it and see - iane ~ RHF
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