WitrynaExtended Double Zepp NVIS Antenna Calculator. The measurements below are for building a Extended Double Zepp Near Vertical Incident Skywave (NVIS) Antenna. The Wire Size can range from 16 AWG to 12 AWG. The larger the wire, the wider the … WitrynaThe Extended Double Zepp • Length is approximately 1.28 • Self impedance is approx. 150 -j800 ohms • Antenna can be matched to 50 ohm coax with a series matching section • Directivity ~ 5.0 dBi. This is the maximum broadside directivity for a …
Wire Antennas—Beyond the Dipole - OnAllBands
Witrynabasically the impedance at the ter mination of the two extended double zepp antenna stubs in parallel. The 70 ohm impedance thus produced allows direct connection of … Witrynafeedpoint impedance varies greatly as we change operating frequencies from one band to the next. Second, we select the length so that the antenna will show a bi-directional pattern broadside to the wire on all of the bands included. Note that the length makes the antenna an extended double Zepp at the highest frequency. covid testing in long beach city college
Extended Double Zepp
WitrynaThe Double Zepp (Doublet) antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. It covers 7 bands, 10-12-15-17-20-40-80m. … WitrynaA Double Extended Zepp is a 3 db gain antenna . The formula for figuring a 5/8 wave per leg is ” A = 600 divided by the frequency in megahertz . The formula for figuring the matching stub is ” B = 103 divided by the frequency in megahertz . Article by N8ITF originally available at http://home.comcast.net/~n8itf/doubzepp.htm Witryna19 cze 2024 · If each side of the remaining antenna is about 5/8-λ long, this creates the “ Extended Double Zepp ” or EDZ. The length of the feed line also performs an … covid testing in lower bucks county