Home |
Search |
Today's Posts |
#1
![]() |
|||
|
|||
![]()
Nomen Nescio,
. Ready-Made Dipole Antenna Options and a few others too . . . http://groups.yahoo.com/group/Shortw.../message/14436 . Placing a Dipole Antenna next to or on the ground has problems. Actually placing any Antenna Wire next to or on the ground has problems -if- the Wire is Bare Copper {Metal} and Uninsulated. . 1 - These four Shortwave Listener (SWL) Antennas are Dipoles : . -BUT- They have Bare Copper Wire Antenna Elements. . * Alpha Delta DX-ULTRA Shortwave Listener (SWL) Antenna http://www.universal-radio.com/catalog/sw_ant/3377.html -obtw- it is 80 Feet long . * Eavesdropper-C Trapped Dipole SWL Antenna http://www.universal-radio.com/catalog/sw_ant/0680.html -obtw- it is 43 Feet long . * B&W ASW-60 Multi-Band Trap SWL Antenna http://www.bwantennas.com/ama/specials.ama.htm#asw60 -obtw- it is 35 Feet long . * Grove "Skywire" Dipole SWL Antenna http://www.grove-ent.com/ANT2.html -obtw- it is 66 Feet long . 2 - Here are three smaller Shortwave Listener (SWL) Antennas that use Insulated Wire Antenna Elements : . * RF Systems EMF Electro-Magnetic Field Passive Wire Antenna http://www.universal-radio.com/catalog/sw_ant/0743.html -obtw- it is 16 Feet long and 16 Feet of Coax feed-in-line . * RF Systems Mini-Windom http://www.universal-radio.com/catalog/sw_ant/3575.html -obtw- it is 16 Feet long and 16 Feet of Coax feed-in-line . * Par Electronics EF-SWL End-Fed Shortwave Antenna http://www.universal-radio.com/catalog/sw_ant/2205.html -obtw- it is 45 Feet long Set-Up the EF-SWL as an Off-Center "T" Wire Antenna with the Short-Arm 17 Feet and the Long-Arm 28 Feet. http://www.grove-ent.com/ANT8.html . 3 - Here are three Out-Side Active Antennas to put on top of a 21 Foot Long piece of Top-Rail and mount it Vertically along side the House. Place a Ground Rod at the Base of the Top-Rail and Ground the Top-Rail. . * MFJ-1024 Outdoor Active Antenna http://www.universal-radio.com/catalog/sw_ant/1132.html . * McKay Dymek DA-100E Active Shortwave Antenna http://www.universal-radio.com/catalog/sw_ant/0328.html . * LF Engineering H-800 Skymatch Active Antenna http://www.grove-ent.com/ANT15.html . 5 - Now there is a Dipole Antenna that comes with Coax Cable and uses Insulated Wire for the Antenna Elements. It is the Workman HF / 40 Meter Antenna [WORKBS1HAM] http://www.k1cra.com/catalog/product...productID=1334 2 x 33' (66') 12 gauge Stranded Copper Wire w/Black Plastic Jacket 12' of RG-58AU Coax with PL-259 Connectors 1 Center Insulator / Strain Relief with SO-239 Connector Trim one Arm to 19.7 Feet and the other Arm to 31.8 Feet http://www.k1cra.com/images/products/original/626.jpg - - - BUT IT IS OUT OF STOCK - - - . Also on eBay there is the Workman BS-1 HAM Dipole http://cgi.ebay.com/_W0QQitemZ160150713260 Antenna is only 16.5 Feet per side = 33 Feet Tip-to-Tip Comes with 12 Feet of RG58/U with PL-259 Plugs - - - See three Photo-Images for more info. . TIP - If you have a Wooden Fence in you Yard mount the Wire Antenna Element on it about 4-5 Feet above the Ground. Keeps the Wire Antenna Elements Off-the-Ground and puts the Wire Antenna Elements away from the House and the man-made-noise within it. . BUILD YOUR OWN DIPOLE ANTENNA : Build a One-Piece Dipole Antenna for Shortwave Listening (SWL) from common Speaker Wire. - Buy 50 Feet of Stranded Speaker Wire. - Fold it in Half to find the Center-Point of the Wire. Mark the Center-Point by Wrapping several Wraps of Black Electrical Tape around the Wires; and put a Black Plastic Cable Tie around the Tape to hold the Tape in-place. - Take one end and Strip the Ends and Tin the Wires if your Radio has a pair of Terminals for the External Shortwave Antenna. Or if your Radio only has a SO-239 Jack for the External Shortwave Antenna attach a PL-259 Plug to this Wires. This is now the {Near} Radio-End of the Antenna. - At the other {Far} Antenna-End of the Antenna Split the two Speaker Wires apart all the way to the Black Tape at the Center. - Tie an Overhand Loop Knot in each of the two Antenna-Ends for Rigging. http://members.aol.com/goodheavens/overhand.html - Coil-up each of the Antenna-Ends and secure the Coils. - Secure the Radio-End to a Fixed Object. - At the Black Tape at the Center begin Twisting the Pair of Speaker Wires from the Center to the Radio-End until you have from 4-6 Turns in the Wire Pair per Foot from the Center to the Radio-End. -Note- You have now created a Twisted-Pair feed-in-line for your Antenna. -TBL- You now have a 50 Foot Tip-to-Tip Dipole Antenna with a 25 Foot feed-in-line. - Run it from the Radio out the Window and Rig it Outside as you like. - Rig with Mason Nylon Line -Windom-Ize-It- Trim 10 Feet off one of the Dipole's Arms so that you have a Short-Arm of 15 Feet and a Long-Arm of 25 Feet for a Tip-to-Tip length of 40 Feet. -OR- Simply Fold over one of the Arms on itself so that it is Halfed to 12.5 Feet. -Variation- Fold the 50 Foot of Speaker Wire in Thirds and Wrap the Black Electrical Tape at one of the 1/3 Points. repeat the about remaining steps. This results in a Dipole Antenna that is 33 Foot Tip-to-Tip with a 33 Foot feed-in-line. * * * This is a very low cost Dipole Antenna for Campling etc. . . hope this helps - iane ~ RHF {pomkia} . Shortwave Listener (SWL) Antennas Group = http://tinyurl.com/ogvcf GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ The SWL Antenna Discussion Group = http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna HELP = http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna NEWS = http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna INFO = http://tinyurl.com/ogvcf * * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers' plus plain old "Mister-Know-It-Alls"; and even those Newbees with "I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ " . The Shortwave Listener's Blessing : SWL BLESSING = http://tinyurl.com/s2bjm May You Never Tire of Listening to the Radio and Always have Strong Signals and Noise Free Reception ~ RHF {ibid} http://groups.yahoo.com/group/Shortw...a/message/9233 . 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/ . ¡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/ . = = = = Plain Old American-English Translation = = = = All are Welcome - - - To Join the Shortwave Listeners (SWL) Antenna Group on YAHOO ! http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ . | | | / \ ........!....... = = = On Aug 24, 3:00 pm, Nomen Nescio = = = wrote: I used to be a big fan of swling, back when I lived on a farm and had lots of room and not much local radio noise. I'd throw up a long-wire antenna and do pretty well with it. Nowadays I live on a small lot in a city, and have several computers spewing out noise. I can hear almost nothing with a wire antenna, and I was thinking that if I could find a dipole that came ready-made, with a coax lead-in, I might drop it from the third-floor window and run the dipole along the foundation of the house. I know that the low elevation of the antenna isn't a help, but it would be away from the computers on the second floor, and away from most of the house wiring, so I figure it is a good compromise. The thing is, I have gotten to the point where I do not want to do any work, and am looking for a ready-made antenna. I had one years ago, which would be ideal. The wire was attached to the coax and sealed, so there was nothing to get loose. If something like that is still around, it would be perfect. Thanks for any recommendations. . . .. . |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Building a Ready-Made "GreerTech" Coax Cable [Shielded] Loop Antenna with Multi-Heads | Shortwave | |||
dipole made of two cb whips? | Antenna | |||
What About the G5RV 'type' Dipole Antenna made of Slinkys ? | Shortwave | |||
FM Tx antenna options | Homebrew | |||
a dipole made of two great sheets of metal? | Antenna |