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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 |
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