ZS6BKW / G5RV Optimized Multi Band HF Dipole Antenna Flex-Weave

Discussion in 'Ham Made Gear' started by NI4L, Jan 28, 2014.

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  1. NI4L

    NI4L Ham Member QRZ Page

    Product Description

    In the mid-1980s, Brian Austin (ZS6BKW) ran computer analysis to develop an antenna System that, for the maximum number of HF bands possible, would permit a low Standing Wave Ratio (SWR) without antenna tuner to interface with a 50-Ohm coaxial cable as the main feed line. He identified a range of lengths which, when combined with a matching ladder line length, would provide this characteristic.
    According to an acknowledged expert in computer antenna design and modeling, L. B. Cebik:
    “Of all the G5RV antenna system cousins, the ZS6BKW antenna system has come closest to achieving the goal that is part of the G5RV mythology: a multi-band HF antenna consisting of a single wire and simple matching system to cover as many of the amateur HF bands as possible.”

    ZS6BKW / G5RV Optimized Multi Band Dipole Antenna
    Unlike the original G5RV that requires an antenna tuner on all bands, the ZS6BKW / G5RV is capable of operating on 10, 12, 17, 20 & 40m bands generally without a tuner, with SWR readings usually 1.5:1 or less. Using a tuner 6, 15, 30 & 80m bands with much higher efficiency then the original G5RV.
    ZS6BKW Multi-band Antenna

    Published on <abbr class="published entry-date" title="2012-05-13T07:06:24-0500" style="margin: 0px; padding: 0px;">May 13, 2012</abbr> in Amateur Radio and Radio Antennas.

    "Are you a fan of the G5RV antenna? Then you may be interested in the ZS6BKW antenna. The ZS6BKW antenna is an optimized variant of the venerable old G5RV. The G5RV antenna (c. 1946) was designed by Louis Varney (G5RV, SK). The ZS6BKW (early 1980's) was derived from the G5RV by Brian Austin (G0GSF, formerly ZS6BKW). He developed computer programs that were used in conjunction with Smith charts to calculate the optimum dimensions for his variant of the antenna. Read G0GSF's own article about the antenna."


    Constructed with Flex-Weave #14 wire, 450 Ohm Flex ladder line, W2AU LL-TRANSULATOR, Ladder Grabber center conductor.
    FLEXI 450 OHM LADDER LINE (40')
    #16 AWG; 19/29 strands Cu-clad with black poly jacket. Nominal OD .065 x .930. Extra flexible & less likely to break in the wind. Nominal impedance 450(ohms); VP 91.7%. Good for -20oC to +60oC degrees.
    Ladder Grabber (1)
    Center insulator 450 ohm ladder line ,SS hardware and 2 small end insulators.
    Flex-Weave (92') Machine crimped for permant connection.
    The dipole is constructed using top quality, FLEX-WEAVE TM is a sophisticated hybrid aerial wire. Its new innovation provides rope lay construction strength and high flexibility. It can be tied in knots to insulators and untied for repeated use. FLEX-WEAVE TM is sometimes referred to as "wire rope" or "jewelers rope". It will not kink or rust out as will copper-clad wire. This flexible wire has also been used for rapid deployment, spool-out, military aerials. FLEX-WEAVE TM #14 (168 strands of #36 wire). It is excellent for quads, dipoles, long wires, and rapid deployment (spooled-out) antennas. Highly UV resistant PVC jacket. FLEX-WEAVE TM is the "Cadillac of aerial wire". It has been written about in all amateur radio publications since its introduction in 1989. This revolutionary product has been used by thousands of hams, commercial firms, and government agencies. The insulation has superior abrasion resistance for running through trees and is UV and weather resistant for use on the seacoast or in other harsh environments. They'll stand up to acid rain, high wind loads, and high snow and ice loads.
    The W2AU LL-TRANSULATOR is the latest configuration of the very popular W2AU ANsulator.
    Using the same body design, the traditional eye bolt design on the sides have been replaced with Stainless Steel bolts, washers and nut assemblies. Like our ANsulator it has a built-in lightning arrestor, with a 600 lbs of pull-apart strength in a weatherized, rugged package using only stainless steel hardware.

    ZS6BKW/ G5RV is completely finished assembled and ready to hang. It requires about 92 feet of space and should be hung around 40 feet high or higher. It can be hung in a flat top or inverted V configuration. Unlike Windom’s and OCF Dipoles the ZS6BKW / G5RV is a very forgiving antenna with the consideration of nearby towers, trees, fences & other structures. They don’t seem to have a major effect on it.

    As with all models of the G5RV antenna, the Optimized version also requires a minimum of 70 feet of 50-52 ohm coax to complete the matching network.
    Without this 70 foot of coax, the antenna will NOT function correctly.

    99.98 + shipping

    http://www.ni4l.com/zs6bkw-g5rv-optimized-multi-band-hf-dipole-antenna-flex-weave/

    Thank you
    73
    Chris Ni4L

     

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