2 metres - Revision history

KJ6EUO at 23:29, 12 August 2010

2010-08-12T23:29:21Z

← Older revision		Revision as of 16:29, 12 August 2010
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	}}		}}

	2 metres is probably the most heavily-used amateur band in the United States. Most newly-~~licenced~~ [[Technician\|Technician-class]] operators get their start in amateur radio on 2 ~~metre~~ [[Modes#Frequency Modulation (FM)\|FM]].		2 metres is probably the most heavily-used amateur band in the United States. Most newly-licensed [[Technician\|Technician-class]] operators get their start in amateur radio on 2 meter [[Modes#Frequency Modulation (FM)\|FM]].

	==Equipment==		==Equipment==
	Equipment for operation on two ~~metres~~ is plentiful; many well-known manufacturers produce new base, mobile and ~~handheld~~ transceivers intended specifically for the 2 ~~metre~~ amateur radio band. In some cases, additional bands (most often [[70 ~~centimetres~~]] but occasionally also additional VHF bands) will be supported.		Equipment for operation on two meters is plentiful; many well-known manufacturers produce new base, mobile and hand-held transceivers intended specifically for the 2 meter amateur radio band. In some cases, additional bands (most often [[70 centimeters]] but occasionally also additional VHF bands) will be supported.

	Much of the early equipment deployed by radio amateurs on 2 ~~metre~~ FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-~~synthesised~~ and often also capable of receiving out-of-band services such as weather and marine radio.		Much of the early equipment deployed by radio amateurs on 2 meter FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesized and often also capable of receiving out-of-band services such as weather and marine radio.

	Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available. This ready availability of a wide selection of equipment at reasonable cost has made 2 ~~metres~~ the most commonly-used amateur band for mobile voice communication.		Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available. This ready availability of a wide selection of equipment at reasonable cost has made 2 meters the most commonly-used amateur band for mobile voice communication.

	==Modulation==		==Modulation==
	The most common application of 2 ~~metre~~ radio is in FM voice transmission, either operated directly between stations or via automated [[repeater]]s. Individual FM channels are normally spaced at 15kHz or 20kHz intervals. Repeater inputs below 147MHz are typically set 600kHz below the output frequency; above 147MHz this pattern is reversed.		The most common application of 2 meter radio is in FM voice transmission, either operated directly between stations or via automated [[repeater]]s. Individual FM channels are normally spaced at 15kHz or 20kHz intervals. Repeater inputs below 147MHz are typically set 600kHz below the output frequency; above 147MHz this pattern is reversed.

	The 2 ~~metre~~ band is a popular choice for digital packet transmission, with 144.39MHz (North America) and 144.8MHz (Europe) commonly used for [[APRS]] operation.		The 2 meter band is a popular choice for digital packet transmission, with 144.39MHz (North America) and 144.8MHz (Europe) commonly used for [[APRS]] operation.

	==Propagation==		==Propagation==

Carlb: /* Equipment */

2009-06-06T03:00:02Z

Equipment

← Older revision		Revision as of 20:00, 5 June 2009
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	Much of the early equipment deployed by radio amateurs on 2 metre FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesised and often also capable of receiving out-of-band services such as weather and marine radio.		Much of the early equipment deployed by radio amateurs on 2 metre FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesised and often also capable of receiving out-of-band services such as weather and marine radio.

	Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available. This ready availability of a wide selection equipment at reasonable cost has made 2 metres the most commonly-used band for mobile voice communication.		Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available. This ready availability of a wide selection of equipment at reasonable cost has made 2 metres the most commonly-used amateur band for mobile voice communication.

	==Modulation==		==Modulation==

Carlb at 02:57, 6 June 2009

2009-06-06T02:57:35Z

← Older revision		Revision as of 19:57, 5 June 2009
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	}}		}}

	2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].		2 metres is probably the most heavily-used amateur band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].

	==Equipment==		==Equipment==
Line 17:		Line 17:
	Much of the early equipment deployed by radio amateurs on 2 metre FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesised and often also capable of receiving out-of-band services such as weather and marine radio.		Much of the early equipment deployed by radio amateurs on 2 metre FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesised and often also capable of receiving out-of-band services such as weather and marine radio.

	Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available.		Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available. This ready availability of a wide selection equipment at reasonable cost has made 2 metres the most commonly-used band for mobile voice communication.

	==Modulation==		==Modulation==

Carlb: FM, APRS

2009-06-06T02:54:57Z

FM, APRS

← Older revision		Revision as of 19:54, 5 June 2009
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	==Equipment==		==Equipment==
			Equipment for operation on two metres is plentiful; many well-known manufacturers produce new base, mobile and handheld transceivers intended specifically for the 2 metre amateur radio band. In some cases, additional bands (most often [[70 centimetres]] but occasionally also additional VHF bands) will be supported.

			Much of the early equipment deployed by radio amateurs on 2 metre FM was surplus, built originally for commercial land-mobile use on bands elsewhere in the 130-174MHz spectrum and converted to the 144-148MHz amateur band. Users of adjacent spectrum range from marine radiotelephone and public safety to dispatch radios used by taxis and service vehicles. As commercial two-way radio frequencies became more crowded, spacing between channels was reduced, leading to many existing radios becoming available as surplus. The oldest of this equipment was crystal-controlled and provided use of a limited number of FM voice frequencies; modern equipment is frequency-synthesised and often also capable of receiving out-of-band services such as weather and marine radio.

			Commercial land-mobile base station equipment has also been adapted readily to construct repeaters, although factory-built repeaters designed specifically for amateur use are now commercially available.

	==Modulation==		==Modulation==
			The most common application of 2 metre radio is in FM voice transmission, either operated directly between stations or via automated [[repeater]]s. Individual FM channels are normally spaced at 15kHz or 20kHz intervals. Repeater inputs below 147MHz are typically set 600kHz below the output frequency; above 147MHz this pattern is reversed.

			The 2 metre band is a popular choice for digital packet transmission, with 144.39MHz (North America) and 144.8MHz (Europe) commonly used for [[APRS]] operation.

	==Propagation==		==Propagation==
			Signals in this band travel primarily line-of-sight or slightly further. It is not uncommon for a powerful, well-situated repeater to be accessible to mobile stations at up to fifty miles distance. During unusual atmospheric conditions (such as temperature inversion) the VHF signals' range may be significantly but temporarily increased.

	==Australian Bandplan==		==Australian Bandplan==

Carlb: /* Australian Bandplan */

2009-04-09T03:25:11Z

Australian Bandplan

← Older revision		Revision as of 20:25, 8 April 2009
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	[[Image:vk4yeh_vk_2m_bandplan.jpg]]		[[Image:vk4yeh_vk_2m_bandplan.jpg]]


			{{bands}}

G7VRD: Added UK.

2008-07-12T16:35:26Z

Added UK.

← Older revision		Revision as of 09:35, 12 July 2008
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	\|USA=144.000-148.000		\|USA=144.000-148.000
	\|UST=144.000-148.000		\|UST=144.000-148.000
			\|UK=144-146
	}}		}}

TimVK4YEH: added links

2008-07-02T05:04:15Z

added links

← Older revision		Revision as of 22:04, 1 July 2008
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			Other VHF/UHF/Microwave wiki pages : [[13 centimetres]], [[9 centimetres]], [[6 centimetres]], [[3 centimetres]] [[1.25 centimetres]] and [[Bands above 24GHz]].

	{{Band		{{Band
	\|band=2m		\|band=2m

TimVK4YEH: added vk bandplan

2008-07-01T19:53:59Z

added vk bandplan

← Older revision		Revision as of 12:53, 1 July 2008
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	2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].		2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].

	== Equipment ==		==Equipment==

	== Modulation ==		==Modulation==

	== Propagation ==		==Propagation==

			==Australian Bandplan==

			[[Image:vk4yeh_vk_2m_bandplan.jpg]]

YL: Added band template chart

2008-03-29T01:01:27Z

Added band template chart

← Older revision		Revision as of 18:01, 28 March 2008
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			{{Band
			\|band=2m
			\|USG=144.000-148.000
			\|USE=144.000-148.000
			\|USA=144.000-148.000
			\|UST=144.000-148.000
			}}

	2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].		2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].

YL at 04:06, 8 March 2008

2008-03-08T04:06:36Z

← Older revision		Revision as of 21:06, 7 March 2008
Line 1:		Line 1:
	2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre FM.		2 metres is probably the most heavily-used band in the United States. Most newly-licenced [[Technician\|Technician-class]] operators get their start in amateur radio on 2 metre [[Modes#Frequency Modulation (FM)\|FM]].

			== Equipment ==

			== Modulation ==

			== Propagation ==