BM [K5QWG] - Those were Three Good Antenna Suggestions.

IF - The Low-Z (50 Ohm) SO-239 Connector on the Receiver is being
used for some sort of LongWire {Random Wire} Antenna that is using
a Matching Transformer and a Coax Cable Feed-in-Line.

NOTE - My Favorite is the Inverted "L" Antenna with with the
Vertical-Up-Leg at the Far-End and a Remotely Located
Ground Rod at base of the Far-End of the Antenna; also
using a Matching Transformer (UnUn) between the Wire
Antenna Element and the Coax Cable Feed-in-Line and
having the Coax Cable run directly under the Horizontal
Arm of the Antenna.

READ - ABOUT - The "Low Noise" Antenna design concepts
that were popularized by John Doty :
http://groups.google.com/group/rec.r...86383afa7727a9

http://groups.google.com/group/rec.r...38b087b5e89fee

http://groups.yahoo.com/group/Shortw...a/message/5178
http://groups.google.com/group/rec.r...463ad863e5b075

http://groups.google.com/group/rec.r...4620d18b66eeba

http://groups.google.com/group/rec.r...3fe02cad4e5650

http://groups.google.com/group/rec.r...d35eeaa8425c14
http://groups.google.com/group/rec.r...7711375bb4d0bb



THEN CONSIDER A SECOND SHORTWAVE ANTENNA
- - - THINK WINDOM ANTENNA ! ! !
As you observe the High-Z Terminals (500 Ohm) are not being used.
So the High-Z Terminals (500 Ohm) are available to connect a
Second (2nd) "Alternate" {Back-Up} Antenna to the Receiver.

QUESTION : What Will . . .
My Second Shortwave Listener (SWL) Antenna Be ?
{Making Use of the High-Z (500 Ohm) Terminals}
! Think Windom Antenna with 300 Ohm Feed-in-Line !

My Choice for this Second "Alternate" {Back-Up} Antenna
is a Windom Antenna using 300 Ohm TV type Twin Lead
as the Feed-in-Line and simple 20 AWG Hook-Up Wire
as the Wire Antenna Elements.

The Two 'un-equal' Horizontal-Arms of the Windom Antenna
can be Cut for your Target Shortwave Bands or simply
Cut-to-Fit the Available Space allowed by your Lot (Land).

TIP - The Off-Center {Center} Connector for your Windom
* Ten-Tec 3003 Acro-Bat (Dipole Antenna Hanger)
http://www.universal-radio.com/catalog/antsup/3720.html

Windom Antenna = Available Space Tip-to-Tip (T2T) Length
* Short Horizontal-Arm 33% ~ 38% of T2T Length
* Long Horizontal-Arm 62% ~ 67% of T2T Length
* How High ? Rigged the Windom at 25% of T2T Length

Windom Antenna = Cut-to-Shortwave-Band

Large Size - Windom Antenna {~ 100 Feet}
Cut for : 60 Meters = 75 Meters + 49 Meters
T2T = 97.7 Ft = 59.2 Ft + 38.5 Ft and Rigged at 24.5 Ft High

Medium Size - Windom Antenna {~ 65 Feet}
Cut for : 41 Meters = 49 Meters + 31 Meters
T2T = 63.0 Ft = 38.5 Ft + 24.5 and Rigged at 17.1 Ft High

Small Size - Windom Antenna {~ 50 Feet}
Cut for : 31 Meters = 41 Meters + 25 Meters
T2T = 51.5 Ft = 31.8 Ft + 19.7 Ft and Rigged at 15.1 Ft High

Mini Size - Windom Antenna {~ 40 Feet}
Cut for : 25 Meters = 31 Meters + 19 Meters
T2T = 39.6 Ft = 24.5 Ft + 15.1 Ft and Rigged at 10.8 Ft High

RIGGING - Ideally the 300 Ohm Twin Lead Vertical-Up-Leg
of the Windom Antenna should run Straight-Up (Vertically)
from the Ground to the Off-Center Mounting Point of the
Antenna and the Rule-of-Thumb for this simple type of
Windom Antenna is to have the Antenna's Horizontal Arms
Rigged [Flat] at about 25% of the Tip-to-Tip (T2T) Length
of the Antenna. Note - The remainder of the Twin Lead
Feed-in-Line can run along the Ground and then to the
Receiver.

READ - Windom -vice- Dipole which is the better SWL Antenna ? ? ?
http://groups.google.com/group/rec.r...c69758fb501718

http://groups.yahoo.com/group/SWL-AM...nna/message/80
http://groups.yahoo.com/group/Shortw...a/message/1677
http://groups.yahoo.com/group/Shortw...a/message/1596
http://groups.yahoo.com/group/Shortw...a/message/1582

READ - History of the Windom Antenna from the Scottish Ham Portal
http://www.scotham.net
.
.
hope this helps - iane ~ RHF
.
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/
.
Ð’Ñ�е Ð*адушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio дл� 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/
.
= = = = = Translation = = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
.
.. .