Dipole - Revision history

Ka3jjz at 00:51, 3 September 2020

2020-09-03T00:51:52Z

← Older revision		Revision as of 00:51, 3 September 2020
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	A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.		A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.

-	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and [http://www.arrl.org/single-band-dipoles plans] online. ~~Don't be worried about selecting~~ a ~~band or resonant~~ frequency. ~~Just build~~ the ~~largest you can fit at your listening station!~~	+	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and [http://www.arrl.org/single-band-dipoles plans] online. Dipoles are generally cut for a specific frequency, and are most efficient on this and their odd harmonics. For example a 4 Mhz dipole will work well on 12 Mhz. Outside of the frequency for which they are cut, the efficiency of this antenna drops off.

	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type RG-6/RG-59 75 ohm coax found at your local home improvement or department store.		It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type RG-6/RG-59 75 ohm coax found at your local home improvement or department store.

R4002 at 14:13, 30 August 2020

2020-08-30T14:13:57Z

← Older revision		Revision as of 14:13, 30 August 2020
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	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and [http://www.arrl.org/single-band-dipoles plans] online. Don't be worried about selecting a band or resonant frequency. Just build the largest you can fit at your listening station!		Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and [http://www.arrl.org/single-band-dipoles plans] online. Don't be worried about selecting a band or resonant frequency. Just build the largest you can fit at your listening station!

-	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.	+	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type RG-6/RG-59 75 ohm coax found at your local home improvement or department store.

Ka3jjz at 01:11, 28 August 2020

2020-08-28T01:11:50Z

← Older revision		Revision as of 01:11, 28 August 2020
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	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.		It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.
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		+	---
		+	* Return to [[Some Basic HF Antennas]]
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	[[Category: Antennas]]		[[Category: Antennas]]

Beerus at 11:54, 20 April 2012

2012-04-20T11:54:41Z

← Older revision		Revision as of 11:54, 20 April 2012
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	A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.		A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.

-	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and ~~plans at the following url:~~ http://www.arrl.org/single-band-dipoles	+	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and [http://www.arrl.org/single-band-dipoles plans] online. Don't be worried about selecting a band or resonant frequency. Just build the largest you can fit at your listening station!

	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.		It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.
	[[Category: Antennas]]		[[Category: Antennas]]

Beerus at 11:52, 20 April 2012

2012-04-20T11:52:43Z

← Older revision		Revision as of 11:52, 20 April 2012
Line 1:		Line 1:
	A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.		A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.

		+	Dipoles are excellent antennas for general purpose shortwave listening, including pirate radio listening. It is easy to find straightforward instructions on building a dipole, and the materials are cheap and readily available. The ARRL has very straightforward explanations and plans at the following url: http://www.arrl.org/single-band-dipoles
		+
		+	It's useful to note that you do not need to use 50 ohm coaxial cable, which is generally more expensive and harder to source. A simple dipole can be fed with the inexpensive television type 75 ohm coax found at your local home improvement or department store.
	[[Category: Antennas]]		[[Category: Antennas]]

Cosmikdebris at 18:43, 1 October 2007

2007-10-01T18:43:44Z

← Older revision		Revision as of 18:43, 1 October 2007
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-	A dipole is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.	+	A '''dipole''' is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.
		+
		+	[[Category: Antennas]]

WikiSysop: New page: A dipole is perhaps the most basic radio antenna. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at th...

2007-09-14T12:59:50Z

New page: A dipole is perhaps the most basic radio antenna. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at th...

New page

A dipole is perhaps the most basic radio [[antenna]]. The most commonly used dipole is the half-wave, so named because the total length is approximately one half of a wavelength long at the desired center frequency. The antenna is made up of two wire elements, each about a quarter of a wavelength long.