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Whip antennas for portable radios are often made of a series of interlocking telescoping metal tubes, so they can be retracted when not in use. Longer whips, made for mounting on vehicles and structures, are made of a flexible fiberglass rod around a wire core and can be up to 11 m (35 feet) long. The length of a whip antenna is determined by ...
Frequency Conversion Kit MC-516: coverage to 12 MHz; Frequency Conversion Kit MC-517: coverage to 18 MHz. Antennas: 9-foot (2.7 m) whip antenna (receiver), 15-foot (4.6 m) whip antenna (transmitter). Optional 21 ft (6.4 m) whip antenna while stationary or 45 ft (14 m) auxiliary wire antenna for 2.0 to 4.5 MHz coverage. [9]
Much of the site is devoted to the enormous overhead wire antenna array that is necessary to efficiently radiate the VLF waves. The antenna, shown above, consists of ten catenary cables, 5,640–8,700 ft (1,719–2,652 m, 1.1–1.6 miles) long, suspended in a zigzag pattern over the valley between Wheeler mountain and Blue mountain on twelve 200 ft. towers on the mountains' crests.
An antenna top cap installed on the tip of the antenna provides protection for personnel. The construction is the same as is used for sectional fishing poles. The base has a male 3/8-24 thread which is the same as is used on most ham radio and CB antennas. The antenna was 9 feet long when fully assembled.
Antenna connector: BNC female with threaded collar, 50 Ω characteristic impedance, unbalanced [10] Antenna Tuning Capability: OE-505 10-foot (3 m) whip, RF-1941 dipole, random wires, long wires [10] Data Interface: USB and Ethernet with adapter [10] GPS: Internal antenna, with external antenna connector.
Single ASIP Radio Mount (SARM) is the latest vehicle installation mount developed specifically for RT-1523 or RT-1702 radios. SARM solves space and weight claim issues associated with traditional vehicle installation mounts. SARM operates on 12 or 24 volt allowing installation into any military or civilian vehicle. [10]
The SCR-245 was standardized on 10 June 1937, and used by Armored forces for command and control of tank units. It replaced the earlier SCR-189 and was used primarily in the early M2, M3 light tanks as well as the early M3 medium tanks.
A shorter vehicle whip was more practicable and also field antennas were constructed with for example, vertical radiators constructed using the Racal 8 or 12 metre masts. Because these were an electrical compromise, they had to be tuned by use of a TURF (or electrically matched to the set).