Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old November 2nd 05, 12:14 PM
RHF
 
Posts: n/a
Default Workman BS-1 Dipole Antenna = Easy Mod to make it a Mini-Windom Antenna !

For One and All,

- - - - Workman BS-1 Dipole Antenna - - - -
Easy Mod to make it a Mini-Windom Antenna !
http://groups.yahoo.com/group/Shortw...a/message/6232

First as many of your know, I am not a big proponent of Dipole
Antennas for Shortwave Listeners (SWLs). Mainly because Dipole
Antennas are generally : Frequency Specific; Bi-Directional;
and Require more Space and a 'relatively' High Mounting Height
to Function properly; as they were design. Often the Shortwave
Listener does not put them up high enough for effective operation
as a Dipole. This is especially true for Dipole Antennas that
are designed for use in the Lower-End of the Shortwave Band :
120 Meters = 195 Feet Tip-to-Tip and Mount at 98 Feet
90 Meters = 142 Feet Tip-to-Tip and Mount at 71 Feet
75 Meters = 119 Feet Tip-to-Tip and Mount at 59 Feet
60 Meters = 95 Feet Tip-to-Tip and Mount at 48 Feet

WORKMAN BS-1 DIPOLE ANTENNA :
Having said that - Here are some Antenna use 'ideas' about
the Workman BS-1 Dipole Antenna that comes complete with :
BS-1 = http://cgi.ebay.com/_W0QQitemZ5818266840
http://www.workmanelectronics.com/htmdocs/bs1.htm
http://www.workmanelectronics.com/htmdocs/bs1ham.htm

* Pair of 16.5 Foot "Arms" made of 12 AWG Insulated Wire
as Dipole Antenna Elements.
http://pix.auctiva.com/pix/03/32/77/__fp/bs1_ham_x.JPG
http://www.workmanelectronics.com/htmdocs/bs1.htm
http://www.workmanelectronics.com/htmdocs/bs1ham.htm

* Center Dipole Connector with Two Terminals and a SO-239 Jack.
http://pix.auctiva.com/pix/03/32/77/...s1_ham_hub.JPG
http://www.workmanelectronics.com/htmdocs/bs1.htm
http://www.workmanelectronics.com/htmdocs/bs1ham.htm

* Coax Cable 12 Foot RG58/U with PL-259 Connectors on both ends.
http://pix.auctiva.com/pix/03/32/77/__fp/bs1inst.gif
http://www.workmanelectronics.com/htmdocs/bs1.htm
http://www.workmanelectronics.com/htmdocs/bs1ham.htm


DIPOLE SIZE AND WAVE LENGTH {FREQUENCY} :
Remember the Workman BS-1 Dipole Antenna is 'only' 32 Feet Long
"Tip-to-Tip" and this would mean that this Dipole is a :
= Full Wave Length (1 WL ) at 29.3 MHz
= Half Wave Length (1/2 WL) at 14.6 MHz
= Quarter Wave Length (1/4 WL) at 7.3 MHz
= Eighth Wave Length (1/8 WL) at 3.7 MHz
As a Dipole it should be mounted at about 16 Feet above ground,
but could be rigged as little as 8 Feet above ground.

WHY USE IT :
For those with limited space or restrictions this may be the
'small' Antenna for your Shortwave Listening (SWL) Needs.
There Reasons - Its 'complete' 'small' and 'low cost'.

HOW TO RIG IT :
Some Ideas on Rigging the Workman BS-1 Dipole Antenna using
the 'short' 12 Foot of Coax Cable. "IF" your Radio Shack has
a Window them Hang the Workman BS-1 Dipole Antenna outside
the Window :

* "UP" Under the Eaves of the House as a [Hidden] Shortwave
Listener's (SWL) Antenna.

* "From" the Eaves to near the Ground as a 'small' "Tilted"
or 'Sloper' Dipole Antenna.

* "From" the Eaves with the Center near the Ground as a
'small' "V" Dipole Antenna.

* "From" the Eaves by the Center with the Ends near the Ground
as a 'small' Inverted "V" Dipole Antenna.

"IF" you do not have a Window in your Radio Shack or can not
have an OutSide Antenna then Drill a Hole through the Ceiling
of the radio Shack and put the Workman BS-1 Dipole Antenna
In-the-Attic. Use any of the above Dipole Antenna Rigging
Schemes that meet your circumstances and individual needs.

TIP - For Multi-Story Apartment Build Dwellers - Hang
the Workman BS-1 Dipole Antenna outside a Window and
along side the building as a Vertical Dipole Antenna.


MAKING THE WORKMAN BS-1 DIPOLE ANTENNA INTO A MIN-WINDOM :
Fold one of the Wire Arms of this Workman BS-1 Dipole Antenna
over so that the "Arm" is Nine Foot (9') Long making the total
length of the Antenna 25 Feet Long and converting it to an
improved WINDOM Antenna.
Note - Don't Cut the Wire simply fold it over and back along
itself; and use a Plastic Wire Tie about every foot to hold
the two wires together -or- Make a 3.75" Diameter Coil with
the Extra Wire about Eight Turns and use Plastic Wire Ties
in 5-6 Places to hold the Coil together. The Coil can just
hang their on the end.

MINI-WINDOM SIZE AND WAVE LENGTH {FREQUENCY} :
If the Workman BS-1 is configured as a "Mini-Windom" Antenna
it would be a :
= Tip-o-Tip (25') Half Wave Length (1/2 WL) at 18.7 MHz
= Tip-o-Tip (25') Quarter Wave Length (1/4 WL) 9.4 MHz
= Tip-o-Tip (25') Eight Wave Length (1/8 WL) 4.7 MHz
= Long Arm (16') Quarter Wave Length (1/4 WL) 14.6 MHz
= Long Arm (16') Eight Wave Length (1/8 WL) 7.3 MHz
= Short Arm (9') Quarter Wave Length (1/4 WL) 26.0 MHz
= Short Arm (9') Eight Wave Length (1/8 WL) 13.0 MHz

TBL :
The Workman BS-1 Dipole Antenna is Complete and Ready to Rig !
When 'small' Is All You Can Do ! Just Do It ! ! !

READ - THE "IK-STIC" (One Kilo Watt Stick)
http://www.hometown.aol.com/realhamradio2/
This is essentially a Multi-Band Vertical Dipole Antenna which
is used in the field for quick set-up and quick band change.
Since operation on each band requires Antennas of different
lengths, I devised a quick method of modifying the Length to
suit the Band you choose to operate. There are NO Coils or Traps.
Each Dipole Band gives 100% Radiation, thereby allowing maximum
signal at maximum height.


SOURCES :
Workman BS-1 Dipole Antenna with or without the Coax Cable
http://www.workmanelectronics.com/htmdocs/bs1.htm
http://www.workmanelectronics.com/htmdocs/bs1ham.htm
http://cgi.ebay.com/_W0QQitemZ5824645233
http://cgi.ebay.com/_W0QQitemZ5825617901
http://cgi.ebay.com/_W0QQitemZ5822924247
http://cgi.ebay.com/_W0QQitemZ5812698023
http://cgi.ebay.com/_W0QQitemZ5818266840
http://www.abc-comm.com/WORKMAN_PRODUCTS.htm
- - - http://www.abc-comm.com/images/Antennas/WORKMAN/BS1.JPG
http://ctrlcom.com/charley3/antenna/antenna.htm
http://tinyurl.com/a5rkj
http://www.maycomcomm.com/catalog/workman.htm

Workman Electronics .Com = http://www.workmanelectronics.com/
POC = http://www.workmanelectronics.com/contact.htm


iane ~ RHF
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Inverted ground plane antenna: compared with normal GP and low dipole. Serge Stroobandt, ON4BAA Antenna 8 February 24th 11 11:22 PM
The "TRICK" to TV 'type' Coax Cable [Shielded] SWL Loop Antennas {RHF} RHF Shortwave 23 November 3rd 04 02:38 PM
Shortwave random-wire antenna question Dave Shortwave 88 April 23rd 04 03:27 PM
Poor quality low + High TV channels? How much dB in Preamp? lbbs Antenna 16 December 13th 03 04:01 PM
QST Article: An Easy to Build, Dual-Band Collinear Antenna Serge Stroobandt, ON4BAA Antenna 12 October 16th 03 07:44 PM


All times are GMT +1. The time now is 06:33 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017