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enacademic.com амёбиаз amebiasis Заболевание человека, возникающее вследствие поражения толстого кишечника и других внутренних органов дезинтерийной амёбой
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амёбиаз
amebiasis Заболевание человека, возникающее вследствие поражения толстого кишечника и других внутренних органов дезинтерийной амёбой
амёбиаз
amebiasis Заболевание человека, возникающее вследствие поражения толстого кишечника и других внутренних органов дезинтерийной амёбой
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ARC-5 - Academic Dictionaries and Encyclopedias
The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft during <rWorld War II and the years following. It was an improvement of the Navy's ARA/ATA command set. Similar units designated SCR-274-N were used in U.S. Army aircraft. The Army set is based on the Navy ARA/ATA, not the later AN/ARC-5.
History
The AN/ARC-5 command set was used by the <rUS Navy from the latter part of World War II into the post-war era. It was fitted in many different aircraft types for communication between aircraft, navigation, and communication back to base. Units were available that covered much of the <rMF, <rHF, and <rVHF spectrum. Despite the use of octal base <rvacuum tubes, they were compact, rugged and light weight. Many became surplus after the war and were often converted for <ramateur radio use. [[http://www.shlrc.mq.edu.au/~robinson/museum/command.html Command receivers ] ] The term "ARC-5" has come to be a generic, though incorrect, term for all similar command set units, including those designed by the Aircraft Radio Corporation in the late 1930s. [[http://aafradio.org/flightdeck/arc5-1.htm Entire ARC-5 ] ]
The ancestor of the AN/ARC-5 system was the U.S. Navy's ARA/ATA system, with initial deployment in 1940. The designations ARA and ATA are a pre-WWII Navy equipment nomenclature. The major units of the ARA are five receivers covering 0.19 to 9.1 MHz, each unit with its own dynamotor power supply. The major units of the ATA are five transmitters covering 2.1 to 9.1 MHz, using a common transmitter dynamotor/screen modulator unit. Most units were made by the Aircraft Radio Corporation (USN manufacturer's code CBY). Many units were also made by Stromberg-Carlson (USN manufacturer's code CCT).
To equip <rUS Army Air Corps planes, the US Army adopted in 1941 a reduced set of these radios known as the SCR-274-N that was electrically almost identical to their ARA/ATA equivalents, except for receiver output and modulator sidetone audio transformer output impedance. It was mechanically almost identical except for most later units being left unpainted aluminum in contrast to the black crackle finish of the Navy sets. The designation SCR-274-N is a pre-WWII Army equipment nomenclature. The Army did not acquire a receiver covering 1.5 to 3.0 MHz, nor a transmitter covering 2.1 to 3.0 MHz. Initially, the Army did not acquire a 3.0 to 4.0 MHz transmitter, nor a 0.52 to 1.5 MHz receiver, but need to communicate on the common civil airfield frequency of 3.105 MHz plus the anticipated USAAF use of the AN/ARR-1 homing adapter (see below) compelled adding these units to the SCR-274-N. Early Army units were made by Aircraft Radio Corporation, but the vast majority was made by Western Electric, plus a few by Colonial Radio and others.
The main units of both the Navy and the Army systems were usually installed in three-receiver racks and two-transmitter racks. Units not in service could be stored on board the aircraft, just as one would store tuning units of other types of radio equipment.
In late 1943, the U.S. Navy fielded an improved and more flexible set of radios known under the new Joint Army-Navy (JAN) nomenclature of AN/ARC-5. A receiver and transmitter were added that provide four-channel crystal-controlled VHF-AM operation, along with a rarely encountered set of transmitters that provide coverage of 0.5 to 2.1 MHz.
pecifications
The following is a table of ARA/ATA, SCR-274-N, and AN/ARC-5 major components that would comprise a typical three-receiver, two-transmitter installation. In addition, several miscellaneous components are listed. A blank in the component ID column indicates t[...]
ARC-5 - Academic Dictionaries and Encyclopedias
The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft during <rWorld War II and the years following. It was an improvement of the Navy's ARA/ATA command set. Similar units designated SCR-274-N were used in U.S. Army aircraft. The Army set is based on the Navy ARA/ATA, not the later AN/ARC-5.
History
The AN/ARC-5 command set was used by the <rUS Navy from the latter part of World War II into the post-war era. It was fitted in many different aircraft types for communication between aircraft, navigation, and communication back to base. Units were available that covered much of the <rMF, <rHF, and <rVHF spectrum. Despite the use of octal base <rvacuum tubes, they were compact, rugged and light weight. Many became surplus after the war and were often converted for <ramateur radio use. [[http://www.shlrc.mq.edu.au/~robinson/museum/command.html Command receivers ] ] The term "ARC-5" has come to be a generic, though incorrect, term for all similar command set units, including those designed by the Aircraft Radio Corporation in the late 1930s. [[http://aafradio.org/flightdeck/arc5-1.htm Entire ARC-5 ] ]
The ancestor of the AN/ARC-5 system was the U.S. Navy's ARA/ATA system, with initial deployment in 1940. The designations ARA and ATA are a pre-WWII Navy equipment nomenclature. The major units of the ARA are five receivers covering 0.19 to 9.1 MHz, each unit with its own dynamotor power supply. The major units of the ATA are five transmitters covering 2.1 to 9.1 MHz, using a common transmitter dynamotor/screen modulator unit. Most units were made by the Aircraft Radio Corporation (USN manufacturer's code CBY). Many units were also made by Stromberg-Carlson (USN manufacturer's code CCT).
To equip <rUS Army Air Corps planes, the US Army adopted in 1941 a reduced set of these radios known as the SCR-274-N that was electrically almost identical to their ARA/ATA equivalents, except for receiver output and modulator sidetone audio transformer output impedance. It was mechanically almost identical except for most later units being left unpainted aluminum in contrast to the black crackle finish of the Navy sets. The designation SCR-274-N is a pre-WWII Army equipment nomenclature. The Army did not acquire a receiver covering 1.5 to 3.0 MHz, nor a transmitter covering 2.1 to 3.0 MHz. Initially, the Army did not acquire a 3.0 to 4.0 MHz transmitter, nor a 0.52 to 1.5 MHz receiver, but need to communicate on the common civil airfield frequency of 3.105 MHz plus the anticipated USAAF use of the AN/ARR-1 homing adapter (see below) compelled adding these units to the SCR-274-N. Early Army units were made by Aircraft Radio Corporation, but the vast majority was made by Western Electric, plus a few by Colonial Radio and others.
The main units of both the Navy and the Army systems were usually installed in three-receiver racks and two-transmitter racks. Units not in service could be stored on board the aircraft, just as one would store tuning units of other types of radio equipment.
In late 1943, the U.S. Navy fielded an improved and more flexible set of radios known under the new Joint Army-Navy (JAN) nomenclature of AN/ARC-5. A receiver and transmitter were added that provide four-channel crystal-controlled VHF-AM operation, along with a rarely encountered set of transmitters that provide coverage of 0.5 to 2.1 MHz.
pecifications
The following is a table of ARA/ATA, SCR-274-N, and AN/ARC-5 major components that would comprise a typical three-receiver, two-transmitter installation. In addition, several miscellaneous components are listed. A blank in the component ID column indicates t[...]
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Simone Devon - Academic Dictionaries and Encyclopedias
Simone Devon is a famous United States bondage model and later producer and director who became notable in the 1980s for performing for several of the successful bondage film and magazine companies of that era, most notably for Harmony Concepts and House of Milan.As of 2005, Devon no longer performs in bondage films nor publicly produces any bondage films or photography.
Simone Devon - Academic Dictionaries and Encyclopedias
Simone Devon is a famous United States bondage model and later producer and director who became notable in the 1980s for performing for several of the successful bondage film and magazine companies of that era, most notably for Harmony Concepts and House of Milan.As of 2005, Devon no longer performs in bondage films nor publicly produces any bondage films or photography.
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enacademic.com ARC-5 - Academic Dictionaries and Encyclopedias The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft…
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ARC-5 - Academic Dictionaries and Encyclopedias
The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft during <rWorld War II and the years following. It was an improvement of the Navy's ARA/ATA command set. Similar units designated SCR-274-N were used in U.S. Army aircraft. The Army set is based on the Navy ARA/ATA, not the later AN/ARC-5.
History
The AN/ARC-5 command set was used by the <rUS Navy from the latter part of World War II into the post-war era. It was fitted in many different aircraft types for communication between aircraft, navigation, and communication back to base. Units were available that covered much of the <rMF, <rHF, and <rVHF spectrum. Despite the use of octal base <rvacuum tubes, they were compact, rugged and light weight. Many became surplus after the war and were often converted for <ramateur radio use. [http://www.shlrc.mq.edu.au/~robinson/museum/command.html Command receivers ] The term "ARC-5" has come to be a generic, though incorrect, term for all similar command set units, including those designed by the Aircraft Radio Corporation in the late 1930s. [http://aafradio.org/flightdeck/arc5-1.htm Entire ARC-5 ]
The ancestor of the AN/ARC-5 system was the U.S. Navy's ARA/ATA system, with initial deployment in 1940. The designations ARA and ATA are a pre-WWII Navy equipment nomenclature. The major units of the ARA are five receivers covering 0.19 to 9.1 MHz, each unit with its own dynamotor power supply. The major units of the ATA are five transmitters covering 2.1 to 9.1 MHz, using a common transmitter dynamotor/screen modulator unit. Most units were made by the Aircraft Radio Corporation (USN manufacturer's code CBY). Many units were also made by Stromberg-Carlson (USN manufacturer's code CCT).
To equip <rUS Army Air Corps planes, the US Army adopted in 1941 a reduced set of these radios known as the SCR-274-N that was electrically almost identical to their ARA/ATA equivalents, except for receiver output and modulator sidetone audio transformer output impedance. It was mechanically almost identical except for most later units being left unpainted aluminum in contrast to the black crackle finish of the Navy sets. The designation SCR-274-N is a pre-WWII Army equipment nomenclature. The Army did not acquire a receiver covering 1.5 to 3.0 MHz, nor a transmitter covering 2.1 to 3.0 MHz. Initially, the Army did not acquire a 3.0 to 4.0 MHz transmitter, nor a 0.52 to 1.5 MHz receiver, but need to communicate on the common civil airfield frequency of 3.105 MHz plus the anticipated USAAF use of the AN/ARR-1 homing adapter (see below) compelled adding these units to the SCR-274-N. Early Army units were made by Aircraft Radio Corporation, but the vast majority was made by Western Electric, plus a few by Colonial Radio and others.
The main units of both the Navy and the Army systems were usually installed in three-receiver racks and two-transmitter racks. Units not in service could be stored on board the aircraft, just as one would store tuning units of other types of radio equipment.
In late 1943, the U.S. Navy fielded an improved and more flexible set of radios known under the new Joint Army-Navy (JAN) nomenclature of AN/ARC-5. A receiver and transmitter were added that provide four-channel crystal-controlled VHF-AM operation, along with a rarely encountered set of transmitters that provide coverage of 0.5 to 2.1 MHz.
pecifications
The following is a table of ARA/ATA, SCR-274-N, and AN/ARC-5 major components that would comprise a typical three-receiver, two-transmitter installation. In addition, several miscellaneous components are listed. A blank in the component ID column indicates t...
ARC-5 - Academic Dictionaries and Encyclopedias
The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft during <rWorld War II and the years following. It was an improvement of the Navy's ARA/ATA command set. Similar units designated SCR-274-N were used in U.S. Army aircraft. The Army set is based on the Navy ARA/ATA, not the later AN/ARC-5.
History
The AN/ARC-5 command set was used by the <rUS Navy from the latter part of World War II into the post-war era. It was fitted in many different aircraft types for communication between aircraft, navigation, and communication back to base. Units were available that covered much of the <rMF, <rHF, and <rVHF spectrum. Despite the use of octal base <rvacuum tubes, they were compact, rugged and light weight. Many became surplus after the war and were often converted for <ramateur radio use. [http://www.shlrc.mq.edu.au/~robinson/museum/command.html Command receivers ] The term "ARC-5" has come to be a generic, though incorrect, term for all similar command set units, including those designed by the Aircraft Radio Corporation in the late 1930s. [http://aafradio.org/flightdeck/arc5-1.htm Entire ARC-5 ]
The ancestor of the AN/ARC-5 system was the U.S. Navy's ARA/ATA system, with initial deployment in 1940. The designations ARA and ATA are a pre-WWII Navy equipment nomenclature. The major units of the ARA are five receivers covering 0.19 to 9.1 MHz, each unit with its own dynamotor power supply. The major units of the ATA are five transmitters covering 2.1 to 9.1 MHz, using a common transmitter dynamotor/screen modulator unit. Most units were made by the Aircraft Radio Corporation (USN manufacturer's code CBY). Many units were also made by Stromberg-Carlson (USN manufacturer's code CCT).
To equip <rUS Army Air Corps planes, the US Army adopted in 1941 a reduced set of these radios known as the SCR-274-N that was electrically almost identical to their ARA/ATA equivalents, except for receiver output and modulator sidetone audio transformer output impedance. It was mechanically almost identical except for most later units being left unpainted aluminum in contrast to the black crackle finish of the Navy sets. The designation SCR-274-N is a pre-WWII Army equipment nomenclature. The Army did not acquire a receiver covering 1.5 to 3.0 MHz, nor a transmitter covering 2.1 to 3.0 MHz. Initially, the Army did not acquire a 3.0 to 4.0 MHz transmitter, nor a 0.52 to 1.5 MHz receiver, but need to communicate on the common civil airfield frequency of 3.105 MHz plus the anticipated USAAF use of the AN/ARR-1 homing adapter (see below) compelled adding these units to the SCR-274-N. Early Army units were made by Aircraft Radio Corporation, but the vast majority was made by Western Electric, plus a few by Colonial Radio and others.
The main units of both the Navy and the Army systems were usually installed in three-receiver racks and two-transmitter racks. Units not in service could be stored on board the aircraft, just as one would store tuning units of other types of radio equipment.
In late 1943, the U.S. Navy fielded an improved and more flexible set of radios known under the new Joint Army-Navy (JAN) nomenclature of AN/ARC-5. A receiver and transmitter were added that provide four-channel crystal-controlled VHF-AM operation, along with a rarely encountered set of transmitters that provide coverage of 0.5 to 2.1 MHz.
pecifications
The following is a table of ARA/ATA, SCR-274-N, and AN/ARC-5 major components that would comprise a typical three-receiver, two-transmitter installation. In addition, several miscellaneous components are listed. A blank in the component ID column indicates t...
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enacademic.com Simone Devon - Academic Dictionaries and Encyclopedias Simone Devon is a famous United States bondage model and later producer and director who became notable in the 1980s for performing for several of the successful bondage film and magazine…
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Simone Devon - Academic Dictionaries and Encyclopedias
Simone Devon is a famous United States bondage model and later producer and director who became notable in the 1980s for performing for several of the successful bondage film and magazine companies of that era, most notably for Harmony Concepts and House of Milan.As of 2005, Devon no longer performs in bondage films nor publicly produces any bondage films or photography.
Simone Devon - Academic Dictionaries and Encyclopedias
Simone Devon is a famous United States bondage model and later producer and director who became notable in the 1980s for performing for several of the successful bondage film and magazine companies of that era, most notably for Harmony Concepts and House of Milan.As of 2005, Devon no longer performs in bondage films nor publicly produces any bondage films or photography.
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United Church in Papua New Guinea and the Solomon Islands
The United Church in Papua New Guinea and the Solomon Islands is a merged denomination dating from 1968 consisting of the former London Missionary Society (operating exclusively in Papua), the relatively marginal Presbyterian church (largely confined to Port Moresby itself) and the Methodist mission (largely operating in the New Guinea Islands, the western and northern Solomons and the islands ...
United Church in Papua New Guinea and the Solomon Islands
The United Church in Papua New Guinea and the Solomon Islands is a merged denomination dating from 1968 consisting of the former London Missionary Society (operating exclusively in Papua), the relatively marginal Presbyterian church (largely confined to Port Moresby itself) and the Methodist mission (largely operating in the New Guinea Islands, the western and northern Solomons and the islands ...
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enacademic.com United Church in Papua New Guinea and the Solomon Islands The United Church in Papua New Guinea and the Solomon Islands is a merged denomination dating from 1968 consisting of the former London Missionary Society (operating exclusively in Papua)…
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United Church in Papua New Guinea and the Solomon Islands
The United Church in Papua New Guinea and the Solomon Islands is a merged denomination dating from 1968 consisting of the former London Missionary Society (operating exclusively in Papua), the relatively marginal Presbyterian church (largely confined to Port Moresby itself) and the Methodist mission (largely operating in the New Guinea Islands, the western and northern Solomons and the islands ...
United Church in Papua New Guinea and the Solomon Islands
The United Church in Papua New Guinea and the Solomon Islands is a merged denomination dating from 1968 consisting of the former London Missionary Society (operating exclusively in Papua), the relatively marginal Presbyterian church (largely confined to Port Moresby itself) and the Methodist mission (largely operating in the New Guinea Islands, the western and northern Solomons and the islands ...
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enacademic.com ARC-5 - Academic Dictionaries and Encyclopedias The AN/ARC-5 Command Radio Setis a series of <rradio receivers, transmitters, and accessories used to provide two-way <rMorse code and AM <rradiotelephone communication for U.S. Navy aircraft…
hat no equivalent unit existed for that system.
(1) Also a component of the Navy's earlier RAV aircraft receiver system.
Audio frequency receiver output and modulator sidetone impedance for the ARA/ATA and the AN/ARC-5 is 300 to 600 ohms. In the SCR-274-N, "A" version receiver and modulator impedance is 4000 to 8000 ohms, while "B" version units have a 300 to 600 ohm tap on the AF transformers which can be connected.
ARA/ATA units and equivalent SCR-274-N units are interchangeable between systems, aside from audio impedance differences. However, AN/ARC-5 units generally are not interchangeable with the units of the earlier systems.
In contrast to ARA and SCR-274-N receivers, all AN/ARC-5 receivers have automatic volume control and a modified tube complement. The AN/ARC-5 navigation receivers have terminals and a switch to connect a DU-series direction finding loop to the receiver, and have a special audio line for an MX-19/ARC-5 adapter to allow the receiver to serve as an LF/MF localizer for the Navy's short-lived AN/ARN-9 Air-Track (related to ZA, ZAX) instrument landing system. These two capabilities were rarely if ever utilized. Otherwise, equivalent receivers of all three systems can interchange as a unit.
Few transmitter components of the AN/ARC-5 are interchangeable with ATA or SCR-274-N equivalent units. Mechanically, the transmitter rear power connector is slightly different, so inserting the wrong transmitter in a rack can damage either the rack or the transmitter power connector. Electrically, AN/ARC-5 transmitters use high-level final amplifier plate modulation, and the output tank circuit is shunt high voltage fed. The two earlier systems use less effective screen modulation, and the output circuit is series high voltage fed. The only electrical components of the AN/ARC-5 transmitter system that are interchangeable with the earlier systems are the dynamotor and the antenna relay.
Unlike earlier systems, none of the AN/ARC-5 control boxes have audio jacks for the microphone, headphone, or key. A separate jack box is used instead. AN/ARC-5 transmitter control boxes contain no Morse key.
The broadcast band receiver in all of these command sets is intended to host a homing adapter for the Navy ZB/YE homing system. The homing adapter demodulates a signal near 246 MHz that is modulated with a broadcast band carrier. The output is sent to the broadcast band receiver tuned to the modulating frequency to further demodulate the carrier for voice messages or for a Morse code letter indicating to the pilot his bearing from the homing transmitter. All broadcast band receivers came with a power adapter to supply power to the homing adapter. The adapter under the Navy nomenclature system is the ZB-series. The identical unit under JAN nomenclature is the AN/ARR-1. This system was used by both the Navy extensively and the Army much less so. To put the system into operation on the aircraft, the beacon band receiver would be replaced in the rack by the broadcast band receiver. The antenna post is connected to the output of the homing adapter, and a power cable is connected from the homing adapter to the broadcast band receiver. The normal control that had been used for the beacon band receiver also serves this homing system without further reconfiguration.
Western Electric developed the AN/ARR-2, an all-in-one homing receiver that replaced the broadcast band receiver and external homing adapter and had other enhancements as well. The R-4A/ARR-2 uses the same dynamotor as the AN/ARC-5 sets, fits in the same racks, and can be controlled by special AN/ARC-5 control boxes. The AN/ARR-2 replaced the earlier R-24/ARC-5 and R-1/ARR-1 combo in AN/ARC-5 installations.
Western Electric developed a four-channel crystal-controlled VHF-AM receiver and transmitter for the U.S. Army's SCR-274-N system. The Army did not adopt these VHF components and continued use of the Bendix SCR-522 VHF-AM set until the arri[...]
(1) Also a component of the Navy's earlier RAV aircraft receiver system.
Audio frequency receiver output and modulator sidetone impedance for the ARA/ATA and the AN/ARC-5 is 300 to 600 ohms. In the SCR-274-N, "A" version receiver and modulator impedance is 4000 to 8000 ohms, while "B" version units have a 300 to 600 ohm tap on the AF transformers which can be connected.
ARA/ATA units and equivalent SCR-274-N units are interchangeable between systems, aside from audio impedance differences. However, AN/ARC-5 units generally are not interchangeable with the units of the earlier systems.
In contrast to ARA and SCR-274-N receivers, all AN/ARC-5 receivers have automatic volume control and a modified tube complement. The AN/ARC-5 navigation receivers have terminals and a switch to connect a DU-series direction finding loop to the receiver, and have a special audio line for an MX-19/ARC-5 adapter to allow the receiver to serve as an LF/MF localizer for the Navy's short-lived AN/ARN-9 Air-Track (related to ZA, ZAX) instrument landing system. These two capabilities were rarely if ever utilized. Otherwise, equivalent receivers of all three systems can interchange as a unit.
Few transmitter components of the AN/ARC-5 are interchangeable with ATA or SCR-274-N equivalent units. Mechanically, the transmitter rear power connector is slightly different, so inserting the wrong transmitter in a rack can damage either the rack or the transmitter power connector. Electrically, AN/ARC-5 transmitters use high-level final amplifier plate modulation, and the output tank circuit is shunt high voltage fed. The two earlier systems use less effective screen modulation, and the output circuit is series high voltage fed. The only electrical components of the AN/ARC-5 transmitter system that are interchangeable with the earlier systems are the dynamotor and the antenna relay.
Unlike earlier systems, none of the AN/ARC-5 control boxes have audio jacks for the microphone, headphone, or key. A separate jack box is used instead. AN/ARC-5 transmitter control boxes contain no Morse key.
The broadcast band receiver in all of these command sets is intended to host a homing adapter for the Navy ZB/YE homing system. The homing adapter demodulates a signal near 246 MHz that is modulated with a broadcast band carrier. The output is sent to the broadcast band receiver tuned to the modulating frequency to further demodulate the carrier for voice messages or for a Morse code letter indicating to the pilot his bearing from the homing transmitter. All broadcast band receivers came with a power adapter to supply power to the homing adapter. The adapter under the Navy nomenclature system is the ZB-series. The identical unit under JAN nomenclature is the AN/ARR-1. This system was used by both the Navy extensively and the Army much less so. To put the system into operation on the aircraft, the beacon band receiver would be replaced in the rack by the broadcast band receiver. The antenna post is connected to the output of the homing adapter, and a power cable is connected from the homing adapter to the broadcast band receiver. The normal control that had been used for the beacon band receiver also serves this homing system without further reconfiguration.
Western Electric developed the AN/ARR-2, an all-in-one homing receiver that replaced the broadcast band receiver and external homing adapter and had other enhancements as well. The R-4A/ARR-2 uses the same dynamotor as the AN/ARC-5 sets, fits in the same racks, and can be controlled by special AN/ARC-5 control boxes. The AN/ARR-2 replaced the earlier R-24/ARC-5 and R-1/ARR-1 combo in AN/ARC-5 installations.
Western Electric developed a four-channel crystal-controlled VHF-AM receiver and transmitter for the U.S. Army's SCR-274-N system. The Army did not adopt these VHF components and continued use of the Bendix SCR-522 VHF-AM set until the arri[...]
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Peregrine Armstrong-Jones
Peregrine Thomas Owen Llewelyn Armstrong Jones ia an international party and events organiser (Bentley’s Entertainments Ltd, London).. The son of Ronald Armstrong-Jones Q.C. and a younger half brother of the Earl of Snowdon, Armstrong-Jones was educated at …
Peregrine Armstrong-Jones
Peregrine Thomas Owen Llewelyn Armstrong Jones ia an international party and events organiser (Bentley’s Entertainments Ltd, London).. The son of Ronald Armstrong-Jones Q.C. and a younger half brother of the Earl of Snowdon, Armstrong-Jones was educated at …
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hat no equivalent unit existed for that system. (1) Also a component of the Navy's earlier RAV aircraft receiver system. Audio frequency receiver output and modulator sidetone impedance for the ARA/ATA and the AN/ARC-5 is 300 to 600 ohms. In the SCR-274…
hat no equivalent unit existed for that system.
(1) Also a component of the Navy's earlier RAV aircraft receiver system.
Audio frequency receiver output and modulator sidetone impedance for the ARA/ATA and the AN/ARC-5 is 300 to 600 ohms. In the SCR-274-N, "A" version receiver and modulator impedance is 4000 to 8000 ohms, while "B" version units have a 300 to 600 ohm tap on the AF transformers which can be connected.
ARA/ATA units and equivalent SCR-274-N units are interchangeable between systems, aside from audio impedance differences. However, AN/ARC-5 units generally are not interchangeable with the units of the earlier systems.
In contrast to ARA and SCR-274-N receivers, all AN/ARC-5 receivers have automatic volume control and a modified tube complement. The AN/ARC-5 navigation receivers have terminals and a switch to connect a DU-series direction finding loop to the receiver, and have a special audio line for an MX-19/ARC-5 adapter to allow the receiver to serve as an LF/MF localizer for the Navy's short-lived AN/ARN-9 Air-Track (related to ZA, ZAX) instrument landing system. These two capabilities were rarely if ever utilized. Otherwise, equivalent receivers of all three systems can interchange as a unit.
Few transmitter components of the AN/ARC-5 are interchangeable with ATA or SCR-274-N equivalent units. Mechanically, the transmitter rear power connector is slightly different, so inserting the wrong transmitter in a rack can damage either the rack or the transmitter power connector. Electrically, AN/ARC-5 transmitters use high-level final amplifier plate modulation, and the output tank circuit is shunt high voltage fed. The two earlier systems use less effective screen modulation, and the output circuit is series high voltage fed. The only electrical components of the AN/ARC-5 transmitter system that are interchangeable with the earlier systems are the dynamotor and the antenna relay.
Unlike earlier systems, none of the AN/ARC-5 control boxes have audio jacks for the microphone, headphone, or key. A separate jack box is used instead. AN/ARC-5 transmitter control boxes contain no Morse key.
The broadcast band receiver in all of these command sets is intended to host a homing adapter for the Navy ZB/YE homing system. The homing adapter demodulates a signal near 246 MHz that is modulated with a broadcast band carrier. The output is sent to the broadcast band receiver tuned to the modulating frequency to further demodulate the carrier for voice messages or for a Morse code letter indicating to the pilot his bearing from the homing transmitter. All broadcast band receivers came with a power adapter to supply power to the homing adapter. The adapter under the Navy nomenclature system is the ZB-series. The identical unit under JAN nomenclature is the AN/ARR-1. This system was used by both the Navy extensively and the Army much less so. To put the system into operation on the aircraft, the beacon band receiver would be replaced in the rack by the broadcast band receiver. The antenna post is connected to the output of the homing adapter, and a power cable is connected from the homing adapter to the broadcast band receiver. The normal control that had been used for the beacon band receiver also serves this homing system without further reconfiguration.
Western Electric developed the AN/ARR-2, an all-in-one homing receiver that replaced the broadcast band receiver and external homing adapter and had other enhancements as well. The R-4A/ARR-2 uses the same dynamotor as the AN/ARC-5 sets, fits in the same racks, and can be controlled by special AN/ARC-5 control boxes. The AN/ARR-2 replaced the earlier R-24/ARC-5 and R-1/ARR-1 combo in AN/ARC-5 installations.
Western Electric developed a four-channel crystal-controlled VHF-AM receiver and transmitter for the U.S. Army's SCR-274-N system. The Army did not adopt these VHF components and continued use of the Bendix SCR-522 VHF-AM set until the arri...
(1) Also a component of the Navy's earlier RAV aircraft receiver system.
Audio frequency receiver output and modulator sidetone impedance for the ARA/ATA and the AN/ARC-5 is 300 to 600 ohms. In the SCR-274-N, "A" version receiver and modulator impedance is 4000 to 8000 ohms, while "B" version units have a 300 to 600 ohm tap on the AF transformers which can be connected.
ARA/ATA units and equivalent SCR-274-N units are interchangeable between systems, aside from audio impedance differences. However, AN/ARC-5 units generally are not interchangeable with the units of the earlier systems.
In contrast to ARA and SCR-274-N receivers, all AN/ARC-5 receivers have automatic volume control and a modified tube complement. The AN/ARC-5 navigation receivers have terminals and a switch to connect a DU-series direction finding loop to the receiver, and have a special audio line for an MX-19/ARC-5 adapter to allow the receiver to serve as an LF/MF localizer for the Navy's short-lived AN/ARN-9 Air-Track (related to ZA, ZAX) instrument landing system. These two capabilities were rarely if ever utilized. Otherwise, equivalent receivers of all three systems can interchange as a unit.
Few transmitter components of the AN/ARC-5 are interchangeable with ATA or SCR-274-N equivalent units. Mechanically, the transmitter rear power connector is slightly different, so inserting the wrong transmitter in a rack can damage either the rack or the transmitter power connector. Electrically, AN/ARC-5 transmitters use high-level final amplifier plate modulation, and the output tank circuit is shunt high voltage fed. The two earlier systems use less effective screen modulation, and the output circuit is series high voltage fed. The only electrical components of the AN/ARC-5 transmitter system that are interchangeable with the earlier systems are the dynamotor and the antenna relay.
Unlike earlier systems, none of the AN/ARC-5 control boxes have audio jacks for the microphone, headphone, or key. A separate jack box is used instead. AN/ARC-5 transmitter control boxes contain no Morse key.
The broadcast band receiver in all of these command sets is intended to host a homing adapter for the Navy ZB/YE homing system. The homing adapter demodulates a signal near 246 MHz that is modulated with a broadcast band carrier. The output is sent to the broadcast band receiver tuned to the modulating frequency to further demodulate the carrier for voice messages or for a Morse code letter indicating to the pilot his bearing from the homing transmitter. All broadcast band receivers came with a power adapter to supply power to the homing adapter. The adapter under the Navy nomenclature system is the ZB-series. The identical unit under JAN nomenclature is the AN/ARR-1. This system was used by both the Navy extensively and the Army much less so. To put the system into operation on the aircraft, the beacon band receiver would be replaced in the rack by the broadcast band receiver. The antenna post is connected to the output of the homing adapter, and a power cable is connected from the homing adapter to the broadcast band receiver. The normal control that had been used for the beacon band receiver also serves this homing system without further reconfiguration.
Western Electric developed the AN/ARR-2, an all-in-one homing receiver that replaced the broadcast band receiver and external homing adapter and had other enhancements as well. The R-4A/ARR-2 uses the same dynamotor as the AN/ARC-5 sets, fits in the same racks, and can be controlled by special AN/ARC-5 control boxes. The AN/ARR-2 replaced the earlier R-24/ARC-5 and R-1/ARR-1 combo in AN/ARC-5 installations.
Western Electric developed a four-channel crystal-controlled VHF-AM receiver and transmitter for the U.S. Army's SCR-274-N system. The Army did not adopt these VHF components and continued use of the Bendix SCR-522 VHF-AM set until the arri...
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enacademic.com Peregrine Armstrong-Jones Peregrine Thomas Owen Llewelyn Armstrong Jones ia an international party and events organiser (Bentley’s Entertainments Ltd, London).. The son of Ronald Armstrong-Jones Q.C. and a younger half brother of the Earl of…
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Peregrine Armstrong-Jones
Peregrine Thomas Owen Llewelyn Armstrong Jones ia an international party and events organiser (Bentley’s Entertainments Ltd, London).. The son of Ronald Armstrong-Jones Q.C. and a younger half brother of the Earl of Snowdon, Armstrong-Jones was educated at …
Peregrine Armstrong-Jones
Peregrine Thomas Owen Llewelyn Armstrong Jones ia an international party and events organiser (Bentley’s Entertainments Ltd, London).. The son of Ronald Armstrong-Jones Q.C. and a younger half brother of the Earl of Snowdon, Armstrong-Jones was educated at …
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enacademic.com ARC-5 - Academic Dictionaries and Encyclopedias
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ARC-5 - Academic Dictionaries and Encyclopedias
ARC-5 - Academic Dictionaries and Encyclopedias