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Comet - CF-706

€72.50

Comet - CFX-514

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Grazioli - G-Max

€309.95

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Grazioli G-MAX vertical collinear antenna 5/8 adjustable from 27 to 28,5 Mhz

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The phasing correction coil

The G-Max coil has been carefully placed at the ends of the two central radiating sections.
It performs three functions of extreme importance for this type of collinear antennas, the first has the task of delaying by 180° the phase of the RF signal between the first section at 1/4 Lambda and the second section at 5/8 Lambda, so that the whole radiating part (whip) radiates in phase.

The second function is to compensate for the strong capacitive reactance present on the top 5/8 section thanks to its intrinsic inductive reactance, and the third function is to transfer all the power fed to the top section without losses.

All this is made possible thanks to the high "Q" factor of our coil, designed to perform all three functions mentioned in the best possible way.

The UHF connector

The 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 ° to + 260 °) and is protected from a special elastomer cap that prevents water and humidity infiltration.

The fixing bracket

Made 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.