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
..