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Build an All Band HF Air Core 1:1 Choke Balun THE UGLY BALUN

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Build an All Band HF Air Core 1:1 Choke Balun THE UGLY BALUN

Build an All Band HF Air Core 1:1 Choke Balun THE "UGLY BALUN" A balun's purpose is to allow connecting a BALanced load (e.g., a dipole or driven element) to an UNbalanced line

http://www.146970.com/PDFs/Ugly%20Choke%20Balun.pdf

Date added: October 5, 2012 - Views: 29

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Build an All Band HF Air Core 1:1 Choke Balun THE UGLY BALUN

\Build an All Band HF Air Core 1:1 Choke Balun THE "UGLY BALUN" A balun's purpose is to allow connecting a balanced, (e.g., a dipole or driven element) to an unbalanced line such as coax which is not

http://www.ad4c.us/Other%20assorted%20manuals/Conferencias%20en%20la%20rueda%20de%20la%20amistad/Build%20an%20All%20Band%20HF%20Air%20Core.pdf

Date added: April 6, 2012 - Views: 57

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The design of Ruthroff broadband voltage transformers – M ...

I started investigating balun construction as a result of various observations I made whilst building HF antennas. ... 1 Ruthroff coiled on air core Yellow trace - length of twin 8 connected as 4:1 Ruthroff coiled around ferrite cores

http://g8jnj.webs.com/Balun%20construction.pdf

Date added: November 25, 2011 - Views: 20

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In Search of the Perfect Stealth Antenna - Western Placer ...

local got on the air, I had to shutdown down due to front end ... I have found on PSK31 using a well matched UnUn 9:1 Balun fed antenna or a PAR antenna ... #18 wire - Solid Copper Enamel on a type 52 Iron core toroid - 66 FT wire 1.8 Mhz - 1.25:1 3.8 Mhz - 1.3:1 High RF feedback high power (10w ...

http://www.wparc.us/presentations/Antenna-UnUn-Article-2.pdf

Date added: September 30, 2012 - Views: 33

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A 4:1 Air-wound Balun - ARI Fidenza

This air-core balun is wound using the following components : • 40mm diameter grey PVC pipe with a length of 9.5cm • 2 endcaps 40mm PVC • Simple zip cord (multi-stranded core insulated wire) • 8 turns bifilar wound • 2 banana type chassis connectors

http://www.arifidenza.it/Public/data/iw0bim/2009228173047_BALUN%204-1%20SU%20PVC.pdf

Date added: June 15, 2013 - Views: 23

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The Antenna Balun

In the case of a 1:1 ratio current balun, core flux density or "magnetizing stress" on the balun core is ... The magnetic material may be "air", but it is a transmission line transformer. Homemade 1:1 balun using a toroidal core and coaxial cable.

http://laarrl.org/pdfs/upthecoax3.pdf

Date added: March 20, 2014 - Views: 2

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SO239 Connector - ARKANSAS ARES RACES

RSARS AIR CORED 1 Balun for 3.5 PARTS REQUIRED 6mm Dia Copper 30.0 MHz Top from MARLEY Plumbing inc PLŽ59 Glue to Comfort top p IHing whdmgs

http://arkansas-aresraces.org/Antennas/HFAntennas/Air%20Cored%201-1%20HF%20BALUN%20-%20G8ODE%20iss%201.1.pdf

Date added: May 15, 2013 - Views: 6

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Constructing a 6:1 RF transformer - MARTIN - G8JNJ

1.9 112 131 172 150 3.6 207 119 239 200 7.1 325 0 325 260 10.1 326 88 338 280 14.1 220 167 ... making on-air measurements. ... 6_1 Balun.pdf Created Date: 11/2/2009 3:47:58 PM ...

http://www.g8jnj.webs.com/6_1%20Balun.pdf

Date added: February 9, 2012 - Views: 38

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Baluns: Good, Bad & Ugly - Tri Cities Amateur Radio Club

internet said an air-wound Balun would work good …. l Next search said “clamp on” Choke around coax. Tri-Cities Amateur Radio Club 11/8/2011 5 Baluns: The Good, Bad & Ugly l Installing G5RV ... – Must be low loss ferrite core or HEAT will destroy

http://www.w7az.org/sites/default/files/Baluns.pdf

Date added: June 9, 2012 - Views: 22

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Choosing the Correct Balun - G4NVH

... air-dielectric feedline is led away from the antenna at right ... antenna tuner baluns than standard bead or air-core baluns. Conventional or True Windom Antennas ... The best balun for the Windom or Off-Center Fed Dipole is a 9:1 ratio current balun.

http://g4nvh.net/sitebuildercontent/sitebuilderfiles/choosingthecorrectbalun.pdf

Date added: February 3, 2012 - Views: 40

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Balun Information - WADSWORTH SALES

Also, the air-core of the coax-balun can't saturate like the ferrite-core and, unlike ferrite-core wire-wound baluns, single-layer wound coax-baluns almost never have an insulation breakdown ... balun 6:1 e 9:1 GO TO HOME PAGE BALUN A LINEA DI TRASMISSIONE 6:1 E 9:1 Back balun 6,25:1

http://www.wadsworthsales.com/Documents/B2%20balun-compilation.pdf

Date added: January 24, 2013 - Views: 15

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COIL / BALUN WINDING HELP SPREADSHEETS By Ed Lawrence, WA5SWD ...

1 COIL / BALUN WINDING HELP SPREADSHEETS By Ed Lawrence, WA5SWD INTRODUCTION ecently, I have been winding and testing air core baluns. The testing is fairly easy since I have

http://www.antennex.com/shack/Oct05/coil_help.pdf

Date added: November 26, 2011 - Views: 24

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Magnetic Longwire Balun : The Original - dépot d'information ...

... Longwire Balun is a compact, weather -proof matching unit. In contrast to cheap copies, the MLB is not just a simple 1: 9 transmission ... and air pollution resistant poly -urethane. If the antenna ... operations. Do NOT use the special wire with a core mentionedfor gas -free welding ...

http://www.devill.net/Documentation/ACCESSOIRES/RF%20Systems/MLB.pdf

Date added: February 3, 2012 - Views: 25

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Build an All Band HF Air Core - Antena DX

Build an All Band HF Air Core 1:1 Choke Balun THE "UGLY BALUN" Introduction.... A balun's purpose is to allow connecting a balanced, (e.g., a dipole or driven element) to

http://www.antenadx.com.br/?wpdmact=process&did=NDEwLmhvdGxpbms=

Date added: March 10, 2014 - Views: 1

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Construction Notes - ARKANSAS ARES RACES

Solder the 1.6mm enamelled copper wires to the SO239 connector to secure the transformer core , but keep these short. ... AIR CORED 1 Balun for 3.5 PARTS REQUIRED 6mm Dia Copper 30.0 MHz Top from MARLEY Plumbing inc PLŽ59 Glue to Comfort top p IHing

http://arkansas-aresraces.org/Antennas/HFAntennas/balun.pdf

Date added: June 15, 2013 - Views: 5

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Low Power Balun

8 W1CG Low Power Balun Kit W1CG Low Power Balun Kit 9 See Picture 4. Continue winding six more, equally spaced turns and adding a 1/8” of heat shrink tubing on the outside of the core

http://u.jimdo.com/www20/o/s9a40520c8a545975/download/mff10cc0ece6cb6d9/1287010806/Balun%2520Manual%2520-%2520final.pdf?px-hash=bc597e92784d1a599b67b620d99a6f452c0ad926&px-time=1403415031

Date added: July 6, 2014 - Views: 1

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Radio FUNdamentals

It is interesting and easy to build an air-core balun, and here are some coax types with which you can experiment and draw your own conclusions as to their utility. The 1-to-1 Coax Balun The first I read of a wideband coax balun

http://www.nonstopsystems.com/radio/pdf-ant/balun-orr.pdf

Date added: March 17, 2014 - Views: 1

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W9GF Balun Testing with AIM4170

April 7, 2008 [W9GF BALUN TESTING WITH AIM4170] W9GF Page 20 Home Brew Balun (3” PVC Pipe air core) I have two of these also – built from an article I saw somewhere on the internet.

https://sites.google.com/a/nienhiser.com/david/d/W9GF.BalunTestingwithAIM4170.07Apr2008b.pdf?attredirects=2

Date added: June 29, 2014 - Views: 1

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oparc.net

Make Your Own Balun Orange Park Amateur Radio Club — November 2007 — Dick Bennett K2LJZ 1:1 Air Core - 50 ohm type 1) Use 3/4" PVC Pipe (1.04" actual dia.), #14 wire, 9 turns Trifllar (Voltage type???)

http://oparc.net/attachmates/antennas/baluns3_071116.pdf

Date added: February 13, 2014 - Views: 1

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The Impedance-Transformation Properties of Common 4:1 Balun ...

... 1 balun between the network and the connections for a parallel transmission line. ... wires around the core. In the past, many voltage baluns used air cores, ... updated for ferrite core use. The Guanella balun usually requires two transformers and

http://w4rnl.net46.net/download/41balun-1.pdf

Date added: March 15, 2013 - Views: 6

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Homebrew and Experimenters Group - ARNSW

Small cable ties or electrical tape to secure the coax to the balun core. Instructions 1. Check that you have all the components 2. ... your balun when it is hung up in the air. 9. Place the wound balun core back into the box and orient it so that the

http://www.arnsw.org.au/brew_text/Kit_1_to_1_HF_Balun_2007-02-28.pdf

Date added: July 6, 2012 - Views: 15

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Fixed Frequency Cable and Wide-Band Magnetic Baluns

... 1 balun is the Ruthroff balun displayed below ... calculate the length of the quarter wave outer shield based on the wave propagation in air because ... http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=16726 “A Single-Core 4:1 Current Transformer With Improved Performance”. Chris ...

http://www.engr.sjsu.edu/rkwok/projects/balun%20report%20beukers%201359.pdf

Date added: April 9, 2012 - Views: 3

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Choosing the Correct Balun - LDS Radio

... air-dielectric feedline is led away from the antenna at ... effective antenna tuner baluns than standard bead or air-core baluns. Conventional or True Windom Antennas ... The best balun for the Windom or Off-Center Fed Dipole is a 9:1 ratio current balun.

http://ldsradio.ca/pdf/choosing-the-correct-balun.pdf

Date added: May 26, 2013 - Views: 2

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Feeding Dipole Antennas - IEARC Home

Fig 3—A coaxial-cable choke balun with an air core is effective and light enough to hang from the feed point of a well- supported dipole antenna.

http://w6ier.org/images/9107022%5BFeeding%20%20Dipole%5D.pdf

Date added: March 7, 2014 - Views: 1

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High Power Multi-band Antenna Optimized for the 75 meter band

• 29 MicroHenry air core inductor. • Ai6rw balun. Three ferrite cores ... 29 MicroHenry air core inductor ... 3.925 1.9 7.200 1.9 14.250 1.5 3.990 1.9 7.175 2.1 14.225 1.6 3.875 1.8 7.150 ...

http://www.wheeler.com/ai6rw/ai6rw_hp_balun_design/End_Fed_OCF_HP_Design.pdf

Date added: May 13, 2013 - Views: 8

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Open Wire Feed Line— A Second Look - N3UJJ

... a 100 foot long dipole, 40 feet in the air, was analyzed using EZNEC (to find its input impedance) and TLA ... 7.1 413.41 + j1155.7 650 0.154 0.107 9.15 10.1 2551.4 – j2804.4 750 0.259 0.202 9.15 ... the balun core will get hot. This

http://n3ujj.com/manuals/Open%20Wire%20A%20Second%20Look.pdf

Date added: September 18, 2012 - Views: 3

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Long Wire special balun end fed Antenna

Characteristics of air&wire wires: weight colour k 'km black, gray, red ,white, note standard wire diameter Cu core diameter wires n x mm 24}021

http://www.sidlo.com/ok1ufc/katalog_listy/ART07.pdf

Date added: March 17, 2014 - Views: 3

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Matching a 60 W GaN HEMT over 100 1000 MHz Bandwidth

ferrite loaded broadband 1:1 Balun at input and output. • Baluns are constructed using 50W coax with 0.2dB/m loss, ... • A high-Q 300nH air core bias feed inductor is used at drain for broadband operation. • 115W ferrite (at 100 MHz) ...

http://www.rfmd.com/cs/documents/COM_KKrishnamurthyPASym12.pdf

Date added: January 2, 2013 - Views: 2

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G5RV Antennas BALUNs & Isolation Transformers Hyper Hanger TM by

B11a 1:1 Voltage Air Core Trifi $19.95 B11i 1:1 Isolation Transformer $29.95 B14va 1:4 Voltage Air ... with ISO BALUN $75 Made with RadioWavz Ultra Durable Easy Flex Stranded Copper Clad Steel, Ham band with little change to ...

http://radiowavz.us/Catalog.pdf

Date added: March 20, 2012 - Views: 24

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40m through 10m Antenna - WIMA

The best balun for this antenna is an air-core choke balun. Avoid using other types of baluns, such as ferrite sleeve or transformer type baluns. This antenna has a high reactive component at the feed point SWR of more than 2:1. The

http://www.1150wima.com/pages/667westmarket/engineering/manuals/MFJ-1778M.pdf

Date added: August 20, 2013 - Views: 1

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Ferrites and Baluns - N.S.A.R.C

Range from µ = 1 (air) to 10,000 + for RF cores! ... " The magnetic path consists of ferrite core + external air " Saturation does not occur but total permeability !is low ... Why use a Balun ? Earth 1 A 1 A 1 A 0.9 A 0.1 A 0.1 A 1 A RF AMP 1 A 1 A 1 A 0.1 A 0.1 A RIG COAX ANTENNA ANTENNA RADIATION

http://www.nsarc.ca/hf/ferrites_baluns.pdf

Date added: May 10, 2012 - Views: 18

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Multi-Band Wire Antennas - The Listener's Guide

advantage of an air-core balun is that they are very simple to wind on a short piece of PVC tubing. The disadvantage is that they must be carefully designed for the desired frequency range, because air core baluns cannot cover the wide range of frequencies as

http://www.listenersguide.org.uk/pdf/multiband-wire-antennas-k9aub.pdf

Date added: August 20, 2013 - Views: 6

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Transmission Lines

Balun may have:-air core-Ferrite toroidal core-Ferrite rod core Current balun: forces same current (I) in both sides of antenna or balanced line ... λ/2 = 468’/7.1 MHz = 65.9’ (length of 7.1 MHz dipole) * Ground effect makes dipole seem around 5% longer.

http://www.illinoisradioleague.org/wp-content/uploads/2014/05/Halifax-ARC-TransLines-and-Antennas.pdf

Date added: June 29, 2014 - Views: 1

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84 metre vertical loop with wideband 200 Ohm Balun

... (either captured from the air or ... The 800 Ohm Balun is a 4:1 voltage (16:1 impedance) ... V² /Z. A toroid core cannot have partial turns so we cannot have a secondary of 38 turns and a primary with 9.5 turns.

http://vk2sth.com/DownloadableContentHandler.ashx?mediaId=a5d51bfb-68bd-4481-b8dc-72718261179d

Date added: July 18, 2013 - Views: 1

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RF Transformers - Mini Circuits

Mutual coupling is accomplished simply with an air core but ... Transformer core saturation is influenced by (1) DC current through the winding, (2) RF input power, ... balun is a transformer that has a balanced input, ...

http://www.minicircuits.com/pages/pdfs/tran14-2.pdf

Date added: January 28, 2012 - Views: 21

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Bob s TechTalk #22 by Bob Eckweiler, AF6C

4:1, 6:1, 9:1 ratios are common ratios. There are many different designs for baluns, but there ... former type uses either air-core coils or, more popularly, ferrite-core coils. ... choke balun is the ‘bead balun’ or W2DU balun.

http://www.w6ze.org/btt/BTT022.pdf

Date added: October 5, 2012 - Views: 4

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BUXCOMM Corp

We ship US air mail to foreign countries. BUXCOMM Sales flyer # 613 ANTENNAS ... compounds to reduce core saturation and more efficiently process ... This is because the 1 to 9 BALUN presents the happy medium for maximum

http://www.jacomm.com/pdfzips/page1-2.pdf

Date added: March 17, 2014 - Views: 6

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RF Transmission Lines and Antennas - PPRAA Home « PPRAA

Another device to match impedance’s is a balun or it’s cousin the unum. ... input of 1:1, 4:1, 9:1 and probably other rations. This mean with a 1:1 ratio the ... They are wound either on a metalized rod or simply has an air core. These are

http://www.ppraa.org/downloads/tech_talk/RF%20Transmission%20Lines%20and%20Antenna%20-%20Part%20Three.pdf

Date added: November 25, 2011 - Views: 17

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MFJ-969 Deluxe Versa Tuner II - QSL.net

... 1 balun. NOTE: Do not connect wire and balanced antenna's to the MFJ-969 at the same time, ... The MFJ Air Core Roller Inductor is designed with an exclusive Self-Resonance ... 50.2 9-1/2 9-1/2 123 3. Apply just enough power on CW ...

http://www.qsl.net/4/4x6on/RADIO%20MANUALS/MFJ--MFJ/MFJ--969--Antenna%20Tuner-Manual.pdf

Date added: October 5, 2012 - Views: 15

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See inside for these New MFJ Products! - QSL.net

Roller Inductor has an air core that can’t burn up! Get ultra high-Q, lowest loss, highest efficiency and highest power han- ... heavy duty 4:1 balun. Custom inductor switch The inductor switch is the most likely component to burn up in any antenna tuner.

http://www.qsl.net/4/4x6on/RADIO%20MANUALS/MFJ--MFJ/MFJ--2004-Broshure.pdf

Date added: November 6, 2011 - Views: 31

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The G5RV Antenna System -- An Analysis - Brazos Valley ...

1:1 Balun •75 ohm coax to ... •Design Note: only use core based baluns in matched conditions . Handle reactance on the load side of the balun ... •Air Wound •Badger (W6TC) Coaxial Choke (HR 2/1980) •K9YC stacked core chokes / ref NCJ

http://www.bvarc.org/pdf/g5rv_w5rh.pdf

Date added: April 29, 2013 - Views: 6

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MFJ-986 Differential-T Tuner - AD4C

1 MFJ-986 Differential ... 986 also features a peak reading cross-needle, SWR/Wattmeter, and a new current balun that will work with balanced open wire, twinlead, ... Note: The MFJ Air Core™ Roller Inductor is designed with an exclusive Self-Resonance Killer™ that

http://www.ad4c.us/MFJ%20antenna%20tuners/MFJ-986.pdf

Date added: February 3, 2012 - Views: 8

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Coaxial Transmitting Chokes - Audio Systems Group

air – Better path for ... Bifilar Choke Balun on low loss core (Discontinued by DX Engineering) Inductive Capacitive This Twin Lead Choke Balun. 57 DX Engineering 50 ...

http://audiosystemsgroup.com/NCDXACoaxChokesPPT.pdf

Date added: December 29, 2011 - Views: 19

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Passive Components - Defense Electronics Magazine | Home

includes a variety of soft ferrite core materi-als in toroid, balun and squaroid geometries. MMG manufactures a full range of soft ferrite cores in MnZn ... space, intelligence, and air surveil-lance radar systems. Covering frequencies of 7.2 GHz to 8.4 GHz, 9.5 GHz to 10.5 GHz, 12.7 GHz to 14.5 ...

http://defenseelectronicsmag.com/site-files/defenseelectronicsmag.com/files/archive/rfdesign.com/mag/704RFD31.pdf

Date added: August 27, 2013 - Views: 1

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Designing Wide-band Transformers for HF and VHF Power Amplifiers

distributed air-gap nature of the ... Fig 9—Conventional 1:1 balun transformer performance. Fig 8—Conventional 1:1 balun transformer. 8 Mar/Apr 2005 much higher frequencies, and it also ... transformer core. The 1:1 balun transformer of Fig 8

http://mirror.unpad.ac.id/orari/orari-diklat/teknik/balun/qx3Trask.pdf

Date added: August 21, 2013 - Views: 1

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MW And LW Noise Reducing Antennas - Kepic

called the Magnetic Longwire Balun.) A digitized copy of my article is given below in ... with my big air core loop antennas for LW nulls. ... (9:1 impedance ratio) to 4.5:1, or even 5:1.

http://jan.kepic.cz/_storage_/ANT-MW_And_LW_Noise_Reducing_Antennas.pdf

Date added: February 3, 2012 - Views: 23

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Cray Valley Radio Society Real Life Wire Antennas

9:1 Balun L D. 13 Antenna Matching Unit ... Transformer Balun • Normally wound on a ferrite core • Used to match a balanced system such as ladder line or a dipole to an ... Lowest loss material is air; thus the concept of guiding waves in

http://www.jaftech.co.uk/cvrs/images/documents/pdf_articles/Wire%20Antennas.pdf

Date added: June 29, 2014 - Views: 1

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Coaxial Transmitting Chokes - Dave Kalahar

air – Better path for ... W2FMI / W1JR Choke Balun #61 core (Discontinued by DX Engineering) WX0B Still Sells Them – $96-$177 Twin Lead Chokes ... Q = 1.9 Curve Fitting –14 turns on #31 Toroid Lp = 650 uH Cp = 2.2 pF Rp = 5,800 ...

http://www.davekalahar.com/Misc_Files/NCDXACoaxChokesPPT[1].pdf

Date added: March 22, 2012 - Views: 5

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Phil Salas Introduction - AD5X

The following equation can be used to calculate the inductance of an air core inductor: L= (d^2 * n^2)/ ... a 9-turn coil over 1.5” of length gives the ... a balun should be used at the feedpoint as this is a balanced antenna. As you can see in Photo G, ...

http://www.ad5x.com/images/Articles/Trap%20Dipole%201217RevA.pdf

Date added: December 7, 2011 - Views: 15

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THE COBWEBB ANTENNA - Front

(without the end on nulls that straight dipoles suffer from), is fed by a single 50 ohm co-ax cable (via an in built air core choke balun), ... between sea water and very poor ground is up to 9 dB for a vertical antenna, but only 1 dB for a horizontal. Page 5 . COBWEBB REVEALED

http://www.g3ejs.com/files/antennas/cobwebbrevealed.pdf

Date added: May 15, 2013 - Views: 3