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Double Bazooka NVIS Antenna Calculator. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. The End Wire Size can range from 16 AWG to 12 AWG. The larger the wire, the wider the bandwidth. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth.
The 80 Meter DOUBLE BAZOOKA antenna will operate on 80 through 10 meters with the aid of an antenna tuner. The following chart gives overall antenna lengths and recommended height placement above ground for a single DOUBLE BAZOOKA.
31 gru 2023 · It is not a full set of directions to build a complete double bazooka. It is a project to build only one part of a double bazooka antenna system. The measurements of the limbs and stingers are band (or band section on 80 and 160 meters) dependent, so I’ll add the needed math in a post below this.
Table 1 gives suggested lengths and separation distances for 160, 80, 40, 20 and 10 meter versions of the antenna. EZNEC wires 1, 2 and 3 are the “dipole” wire and EZNEC wire 4 is the “parasitic” wire referred to in Table 1. One must also tell EZNEC the type of wire that will be used in the antenna’s construction.
This document lists antenna lengths for different frequency bands. It provides lengths for quarter-wave, half-wave and full-wave antennas at center frequencies of 3.7 MHz and 7.1 MHz for the 80m and 40m amateur radio bands respectively.
The Double Bazooka Dipole is a very efficient single band antenna which is very quiet, and does not require the use of a balun. This antenna consists of coax (RG58) or other 50 ohm type with the shield split at the center and the feedline attached to the open ends.
The document provides instructions for building a Double Bazooka antenna using coaxial cable. A Double Bazooka antenna has a wider bandwidth and reduced noise compared to a standard dipole antenna due to using the thicker braided shield of coaxial cable as the radiating element.
