FE10V: The Grazioli FE10V is a high-performance 5\/8 \u03bb vertical antenna engineered for the 10m and 11m bands. Built to withstand 5kW CW continuous power, it delivers exceptional durability, low-angle radiation, and unmatched efficiency for serious DXers and high-power operators.<\/p>\n
The high \u201cQ\u201d Coil:
\nThe coil plays a fundamental role for impedance matching and maximum RF transfer, its shape given by the length \/ diameter ratio, the pitch between turns, the material and diameter of the wire and the presence or absence of metal cores within it, determine the quality factor \u201cQ\u201d. In simple terms, the higher is the \u201cQ\u201d value of the coil, the lower is the losses at high frequency.
\nWe have created a generously sized coil suspended in the air without metal cores, with an L \/ D ratio of 1.3 and widely spaced turns, obtaining a \u201cQ\u201d value of about 2500 at a frequency of 28MHz, when the best competing antennas do not reach 1500. This translates into maximum efficiency, and the ability to withstand high RF powers.
\nIn addition, the coil is directly connected to ground in direct current (DC-Ground), in this way atmospheric disturbances and background noises are significantly reduced.<\/p>\n
UHF Connector:
\nThe FE10V connector is not a commercial SO-239 type connector as most manufacturers use. The connector was designed and built directly by us, has a real impedance of 50 Ohms and can be used up to 500 MHz. The goal was to create a reliable connector capable of withstanding 5kW CW continuous at 30 MHz. The body is made of CW614N nickel-plated brass, while the pin is plated in 24K gold to avoid oxidation and equipped with a 4-fin insulator that maintains its centering and elasticity, avoiding contact losses. The insulating part is made of PTFE which is one of the best insulating materials due to its exceptional electrical (low dielectric constant, and reduced loss factor) and thermal (operating temperature from -100 \u00b0 to + 260 \u00b0) and is protected from a special elastomer hood that prevents water and humidity infiltration.<\/p>\n
The fixing bracket:
\nMade of 2.5mm thick AISI304 stainless steel, it is fixed to the antenna tube by means of a clamp closure system, creating an extremely strong mechanical locking. Fixing to the mast is made with AISI304 M6 V-Bolt and high type nuts to facilitate tightening.<\/p>\n
Specifications:
\nAdjustable frequency range from 26 to 28 MHz
\nFeed system high-Q air wound matching coil, DC-Ground
\n50\u03a9 unbalanced impedance
\nOmnidirectional radiation
\nVertical polarization
\nGain of 1.5 dBd – 3.65 dBi
\nResonant SWR \u22641.2 : 1 measured at the connector
\nMaximum applicable power of 5000 Watts continuous all transmit mode
\nPower System: High Q coil power supply connected to DC ground
\nConnector: 50 \u03a9 female UHF with PTFE insulation, gold-plated Centre pin
\nMaterials: AW6063-T66 aluminum alloy tube, fibreglass, brass, PTFE, stainless steel screws
\nWind surface: 0.29m2
\nWind load at 130Km\/h: 280N – 28.5Kgf
\nWind resistance: 130 Km\/h
\nTotal height: 7.63m at 26MHz
\nRadial length: 2.7m (1\/4 wave)
\nMast mounting: \u00f8 40-54 mm
\nWeight in package: 7.3 kg
\nAntenna Weight : 6 Kg<\/p>\n","protected":false},"excerpt":{"rendered":"
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