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CF,
I Am Glad You Asked ![]() B A L U N - R E A D I N G - L I S T - (First Draft): The BALUN Defined: "A balun is a device that joins a balanced line (one that has two conductors, with equal currents in opposite directions, such as a twisted pair cable) to an unbalanced line (one that has just one conductor and a ground, such as a coaxial cable). A balun is a type of transformer: it's used to convert an unbalanced signal to a balanced one or vice versa. Baluns isolate a transmission line and provide a balanced output. A typical use for a balun is in a television antenna. The term is derived by combining balanced and unbalanced." http://searchnetworking.techtarget.c...342213,00.html "Baluns and ununs (unbalanced-to-unbalanced transformers) belong to a class of matching devices known as transmission line transformers. They transmit the energy from input to output by a transmission line mode instead of by flux linkages as in the case of conventional transformers. When properly designed, they can have extremely high efficiencies and very broad bandwidths. The theory of operation of these devices rests chiefly on that of chokes and transmission lines. A balun or unun is simply a choke that isolates the input from the output (thus only allowing transmission currents to flow) and a configuration of transmission lines." http://www.coilws.com/W2FMI.htm Balun Explained (WTH is a Balun) by G4NSJ http://www.g4nsj.co.uk/balun.shtml The Purpose for a Balun by John Doty "The purpose of a balun is to block common mode waves (current flowing in the same direction on both conductors of a transmission line) and pass differential mode waves (current flowing in opposite directions on the conductors)." http://www.hard-core-dx.com/nordicdx...ed/balun3.html Matching Less Important for Reception - by John Doty http://www.hard-core-dx.com/nordicdx...ed/balun5.html A Review of the ICE Model 180 Beverage/Longwire Matching Unit - - - by John Doty http://www.anarc.org/naswa/badx/ante...ing_xfrmr.html Low Noise Antenna - by John Doty http://www.anarc.org/naswa/badx/ante...e_antenna.html Grounding is Key to Good Reception - by John Doty http://www.anarc.org/naswa/badx/antennas/grounding.html Balun Measurements http://www.radioworks.com/nbalmeas.html Experiments on Remote Receiving Loops by Lyle Koehler [KØLR] (Using a Balun with a LW/LF Loop Antenna) http://members.aol.com/lwcanews/longwave/lf-loops.htm Fabricating Impedance Transformers for Receiving Antennas - - - May 2001 by Paul Bryant http://members.aol.com/DXerCapeCod/z_transformers.pdf Balun Core and Winding Methods http://www.catchnet.com.au/~rjandusimports/tut_11b.html Construction and Use of Broadband Transformers http://www.oselectronics.com/downloa...ansformers.pdf Winding Your Own Transformers http://www2.hard-core-dx.com/nordicd...ansformer.html TRANSMITTER-RATED TOROIDAL BALUN KITS, TOROIDS & ENAMELLED WIRE PACKS http://www.ozgear.com.au/balun/ToroidalBalunKits.htm Binocular Cores vs Toroidal Cores http://lists.contesting.com/archives.../msg00001.html RFI - Ferrites - Baluns - Iron Powder http://www.sadona.com/news/news5.html Baluns and Common Mode Noise Isolation http://www.w8ji.com/common-mode_noise.htm Doug's Antenna Transformer Page Antenna Transformer Construction and Testing http://users.netonecom.net/~swordman/Radio/unun.htm Transmission Line Transformers "THEORY" http://www.bytemark.com/products/tlttheory.htm RF Transformers by Mini-Circuits http://www.minicircuits.com/appnote/tran14-2.pdf 1:1 Balun http://www.qsl.net/iz7ath/web/02_bre.../pag09_eng.htm 4:1 TRANSMISSION LINE BALUN http://www.qsl.net/iz7ath/web/02_bre.../pag10_eng.htm 4:1 balun for 160 to 10 meters http://www.hard-core-dx.com/nordicdx.../4_1balun.html Putting a Balun and a Tuner Together - by Kevin Schmidt [W9CF] http://fermi.la.asu.edu/w9cf/articles/balun/ 4:1 QRP Balun by C. C. (Clay) Wynn N4AOX http://kg8ih.cit.cwru.edu/w8edu/proj...ynn-balun.html W2FMI Transmission Line Transformers (BalUns & UnUns) - - - by Jerry Sevick http://www.coilws.com/W2FMI.htm Homebrew a 4 To 1 Balun - by Mike Martell [N1HFX] http://www.rason.org/Projects/balun/balun.htm Beverage Matching/Tuning/Balun - by Mauno Ritola http://dallas.hard-core-dx.com/archi.../msg02536.html The Loaded Dog 1:1 Antenna Balun http://www.geocities.com/the_loaded_.../project1.html The BALUN - by Ian C. Purdie [VK2TIP] http://my.integritynet.com.au/purdic/baluns.htm The Choke Balun at Electronics Tutorials http://www.electronics-tutorials.com...hoke-balun.htm Toridal Balun Winding - by W8JI http://www.w8ji.com/toroid_balun_winding.htm Balun and Core Selection - by W8JI http://www.w8ji.com/core_selection.htm HOW TO Construct a Guanella Balun - by Ralph Holland [VK1BRH] (A Cost Effective Current-Mode 1:4 Balun) http://www.arising.com.au/people/Hol...h/CM4Balun.htm Impedance Matching Transformer (IMT) - by Paul Ormandy [NZRDXL] http://radiodx.com/spdxr/Baluns.htm Baluns, Earth and More… - by Paul Ormandy [NZRDXL] http://radiodx.com/spdxr/Some_Important_Aerial.html Impedance Matching Transformers for Receiving Antennas at Medium and Lower Shortwave Frequencies June 2003 by Bill Bowers, John Bryant and Nick Hall-Patch [VE7DXR] http://radiodx.com/spdxr/media/imt_doc1.doc Magnetic Longwire Balun (MLB) Palomar http://www.palomar-engineers.com/MLB-1/mlb-1.html MLB for DX-Antennas - by "VK3KCG" Australia http://dxantennas.com/wst_page4.php The Magnetic Longwire Balun (MLB) = = = A "CON" or Not ? http://www.hard-core-dx.com/nordicdx...d/magbal1.html The Complete Answer to your Interference Problem the "LWC System" for Long Wire Antennas http://ourworld.compuserve.com/homep...kit/lwcsys.htm W1CG - Balun Kit http://www.njqrp.org/balun/ iane ~ RHF .. .. = = = "chuck" = = = wrote in message ... could some one explain what An impedance matching transformer is and how i could make one? thanks charles foster .. |
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