Search results with tag "Nvis"
Near Vertical Incidence Sky Wave (NVIS).ppt - N3UJJ
n3ujj.comBackground • Near Vertical Incidence Sky Wave (NVIS) propagation provides local and regional coverage on the lower HF bands. • NVIS is not new. – German army experimented with NVIS during WW II – US military personnel used NVIS in Vietnam.
CARA NVIS Article 3 - arrl-ohio.org
arrl-ohio.orgImproving the AS-2259 NVIS Antenna By N3AE and N3IDX Most CARA members just finished making NVIS antennas for HF emergency service use on 80 and 40 meters.
A Portable 75/40* Meter NVIS Antenna - arrl-ohio.org
arrl-ohio.orgA Portable 75/40* Meter NVIS Antenna - with 3/2/'09 updates - by David B. Murray, KD1BL Author's Note: This article describes a 75/40 meter NVIS, but one could use the construction techniques to …
AAR2EY All Band NVIS Antennae Designs - N2CKH
www.n2ckh.comAAR2EY All Band NVIS Antennae Designs Updated 20 May 2007 Updated 23 February 2006 Updated 9 November 2005 Started 13 February 2004 As user of MF/HF frequencies, a dedicated a Near Vertical Incident Skywave (NVIS)
LIGHTING, AIRCRAFT, NIGHT VISION IMAGING SYSTEM …
appliedavionics.comLIGHTING, AIRCRAFT, NIGHT VISION IMAGING SYSTEM (NVIS) COMPATIBLE This document is approved for use by the Department of the Air Force and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope.
Compact Multi-Band Rotatable Dipole Antenna Array
wb2lua.comOne of the most effective antennas for NVIS is a dipole that is mounted from 0.1 to 0.25 wavelengths above ground. When a dipole is brought very close two ground, the angle of radiation increases.
NVIS ANTENNA THEORY AND DESIGN - Region 6 Army …
region6armymars.orgMARS frequencies can be greater than 100:1 for an 75m dipole and even for the cross- dipole antenna, as high as 30:1. To follow is a list of possible solutions to this problem: A. Separate Tuned Wires For Each Frequency – A “fan-dipole” antenna with separate resonant ½ wavelength wires for each frequency can be constructed.
Guide de bonnes pratiques d’hygiène Filière vins
www.vignevin.comGuide de bonnes pratiques d’hygiène filière vins R36.5 du 05/09/2016 Guide de bonnes pratiques d’hygiène Filière vins Évaluation des risques et moyens de maîtrise
Mariages & Evénements privés - Le Chateau De Beaulieu
www.lechateaudebeaulieu.frLes cocktails par Marc Meurin Ces cocktails peuvent être adaptés selon vos goûts pour tous types d’événements ou vins d’honneur. Toute notre équipe sera heureuse de vous recevoir dans ce ...
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