Balun - Revision history

Hardaker: /* What is involved in effective balun design? */ link transmission lines

2011-01-23T18:06:45Z

What is involved in effective balun design?: link transmission lines

← Older revision		Revision as of 11:06, 23 January 2011
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	* high winding [[Inductors \| inductance]]		* high winding [[Inductors \| inductance]]
	* low stray [[capacitors \|capacitance]]		* low stray [[capacitors \|capacitance]]
	* very short internal transmission lines, less than 1/4 wavelength		* very short internal [[Feedlines\|transmission lines]], less than 1/4 wavelength
	* high power components that can withstand high power and mismatches		* high power components that can withstand high power and mismatches
	* large wire guage to reduce power losses		* large wire guage to reduce power losses

2010-11-22T04:41:54Z

External links

← Older revision		Revision as of 21:41, 21 November 2010
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	* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html Center-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns		* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html Center-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns
	* [http://combotec.com/projects/balun14/balun14.html A 4:1 Air-wound Balun]		* [http://combotec.com/projects/balun14/balun14.html A 4:1 Air-wound Balun]
			* [http://karinya.net/g3txq/chokes/ Common mode chokes] - efficiency analysis
			* [http://www.ifwtech.co.uk/g3sek/in-prac/ GM3SEK's amateur radio technical notebook], particularly this article: [http://www.ifwtech.co.uk/g3sek/in-prac/inpr1005_ext_v2.pdf Cost-effective chokes and baluns]

	{{electronics}}		{{electronics}}

2010-11-09T05:27:08Z

add an air-wound balun

← Older revision		Revision as of 22:27, 8 November 2010
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	* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html Center-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns		* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html Center-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns
			* [http://combotec.com/projects/balun14/balun14.html A 4:1 Air-wound Balun]

	{{electronics}}		{{electronics}}

2010-11-07T22:38:06Z

fixed bolding error and internal link

← Older revision		Revision as of 15:38, 7 November 2010
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	Balun comes from the words '''BA''lanced to '''UN'''balanced, and is a device to connect balanced and unbalanced parts of a circuit together. Hams frequently use baluns with antennas.		Balun comes from the words '''BA'''lanced to '''UN'''balanced, and is a device to connect balanced and unbalanced parts of a circuit together. Hams frequently use baluns with antennas.

	A balun has two purposes:		A balun has two purposes:
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	Effective balun design will include:		Effective balun design will include:
	* high winding [[~~Inductance~~ \| inductance]]		* high winding [[Inductors \| inductance]]
	* low stray [[capacitors \|capacitance]]		* low stray [[capacitors \|capacitance]]
	* very short internal transmission lines, less than 1/4 wavelength		* very short internal transmission lines, less than 1/4 wavelength

2010-11-07T19:16:27Z

← Older revision		Revision as of 12:16, 7 November 2010
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	== External links ==		== External links ==

	* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html ~~enter~~-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns		* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html Center-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns

	{{electronics}}		{{electronics}}

2010-11-07T19:13:59Z

← Older revision		Revision as of 12:13, 7 November 2010
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	* [[Feedlines]]		* [[Feedlines]]

			== External links ==

			* [http://www.k7mem.150m.com/Electronic_Notebook/antennas/dipole.html enter-Fed Half-Wave Dipole (3-30MHz) by Martin E. Meserve] - good examples on how to build baluns

	{{electronics}}		{{electronics}}

2010-11-07T19:11:18Z

← Older revision		Revision as of 12:11, 7 November 2010
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	When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.		When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.

			== Examples of balun designs ==

			=== Choke balun ===

			A choke balun can be built by simply looping 8 to 10 times a coax line on itself. In fact, a "choke balun" is a bit of a misnomer because it doesn't actually balance the line, but does provides isolation for the transmission line. The proper name for such a device is an [[Wikipedia:RF choke\|RF choke]].

			=== 4:1 UHF baluns ===

			The fairly common connectors to connect ladder-line wires to coaxial lines in television setups are in fact 4:1 baluns for the UHF band.

	== See also ==		== See also ==

2010-11-07T19:03:28Z

← Older revision		Revision as of 12:03, 7 November 2010
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	~~Related wiki pages : [[Antennas]], [[Tuners]], [[Impedance]], [[Feedlines]]~~

	~~==What is a balun==~~

	Balun comes from the words '''BA''lanced to '''UN'''balanced, and is a device to connect balanced and unbalanced parts of a circuit together. Hams frequently use baluns with antennas.		Balun comes from the words '''BA''lanced to '''UN'''balanced, and is a device to connect balanced and unbalanced parts of a circuit together. Hams frequently use baluns with antennas.

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	When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.		When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.

			== See also ==

			* [[Antennas]]
			* [[Tuners]]
			* [[Impedance]]
			* [[Feedlines]]


	{{electronics}}		{{electronics}}

2009-04-11T01:44:07Z

← Older revision	Revision as of 18:44, 10 April 2009
(No difference)

2009-04-09T01:19:59Z

What is saturation?

← Older revision		Revision as of 18:19, 8 April 2009
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	When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.		When a ferrite core balun saturates, SWR will increase - possibly to excessive levels before the balun fails. Core saturation can be caused by too great a mismatch at the load (antenna) or by running two much power or a combination of both.


			{{electronics}}