.net barcode reader component download The G5RV multiband dipole 207 in Software

Generation DataMatrix in Software The G5RV multiband dipole 207

The G5RV multiband dipole 207
Recognize Data Matrix 2d Barcode In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Drawing Data Matrix ECC200 In None
Using Barcode generator for Software Control to generate, create Data Matrix image in Software applications.
135 Feet 80-10 meter antenna
Data Matrix Scanner In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
ECC200 Creator In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create Data Matrix ECC200 image in VS .NET applications.
450- or 600parallel line (any length)
ECC200 Generator In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create ECC200 image in ASP.NET applications.
Making Data Matrix 2d Barcode In VS .NET
Using Barcode creation for VS .NET Control to generate, create ECC200 image in .NET framework applications.
Balanced antenna tuner
Data Matrix 2d Barcode Encoder In VB.NET
Using Barcode generator for .NET Control to generate, create DataMatrix image in VS .NET applications.
Generate GS1 - 13 In None
Using Barcode creator for Software Control to generate, create European Article Number 13 image in Software applications.
Coax
Code 128B Creation In None
Using Barcode printer for Software Control to generate, create Code 128 image in Software applications.
Generate ECC200 In None
Using Barcode creator for Software Control to generate, create Data Matrix ECC200 image in Software applications.
XMTR
GTIN - 128 Generation In None
Using Barcode printer for Software Control to generate, create GTIN - 128 image in Software applications.
Code 3/9 Printer In None
Using Barcode generator for Software Control to generate, create Code 3/9 image in Software applications.
8-2 Tuned feeder antenna can be used on several bands
Painting 4-State Customer Barcode In None
Using Barcode drawer for Software Control to generate, create USPS Intelligent Mail image in Software applications.
Recognize Bar Code In Visual C#
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in .NET framework applications.
(Courtesy of Hands-On Electronics and Popular Electronics)
Generate UPC-A Supplement 2 In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
Paint Barcode In .NET Framework
Using Barcode encoder for Reporting Service Control to generate, create barcode image in Reporting Service applications.
8-3 G5RV antenna
Printing Code 128C In .NET Framework
Using Barcode drawer for Reporting Service Control to generate, create Code 128 Code Set A image in Reporting Service applications.
Matrix Barcode Maker In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create 2D Barcode image in ASP.NET applications.
(Courtesy of Hands-On Electronics and Popular Electronics)
Data Matrix Scanner In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Making UCC.EAN - 128 In Java
Using Barcode printer for Java Control to generate, create GS1-128 image in Java applications.
Twin lead L (Feet) Z0 300 29 450 34
50- coax (any length)
cable Although most articles on the G5RV claim that any length of 50- line will work, J M Haerle (HF Antenna Systems: The Easy Way) recommends that the 50- segment should be at least 65 ft long Haerle is a little caustic in his comments on the G5RV, but his criticism is well taken If you don't have a parallel transmatch, then the G5RV will work (especially if your rig can tolerate a 3:1 VSWR on some selected frequencies) Otherwise, use the antenna of Fig 8-2A (or a transmatch with the G5RV)
208 Multiband and tunable-wire antennas Figure 8-4 shows the once-popular end-fed Zepp antenna This antenna is a monopole in that it uses a half-wavelength radiator, but it is fed at a voltage loop rather than a current loop (ie, the end of the antenna rather than the center) A 450- or 600- parallel transmission line is used to feed the Zepp antenna Although the line can theoretically be any length, practicality dictates a quarter-wavelength because of the fact that the antenna is fed at a high RF voltage point The Zepp (as shown) is a single-band antenna unless the transmission line is fed with a good, widerange transmatch, or other antenna tuner unit The antenna tuner required is a balanced type, although a standard transmatch with a 4:1 balun transformer at the output will also work well Using the Zepp on many bands is easy, but keep in mind that it is voltage-fed, and (at frequencies for which the parallel line is not an odd integer multiple of a quarter-wavelength) there will be a high-voltage node at the transmatch That raises the possibility of RF in the shack hot snippets of RF on the grounded chassis of station equipment (including microphones, where it is uncomfortable when touched to the lips)
Feeding parallel transmission line
Parallel transmission line is balanced with respect to ground, but coaxial cable is unbalanced to ground (ie, one side of the coax is usually grounded) As a result, the standard amateur transmitter output will not drive parallel (balanced) feedline properly You need to do one of two things: (1) buy (or build) an antenna tuner that is balanced on the output and unbalanced on the input or (2) convert a standard "coax-to-coax" transmatch or other form of antenna coupler to coax-to-balanced configuration In some cases you can use a 4:1 balun transformer at the output of the coaxial cable tuner Keep in mind, however, that some tuner manufacturers recommend against this practice If you use the standard tee-network (or SPC) transmatch
Rope /2 Insulator
Rope
Parallel feeders
Tuner
VSWR meter
Coax to XMTR
8-4 End-fed Zepp antenna
Feeding parallel transmission line 209 then it is possible to make a balun for this purpose from some no12 formvar- or enamel-covered wire and either a ferrite toroid or a short piece of PVC plumbing pipe Figure 8-5 shows a balun coil construction project Use 12 turns of no12 formvar or enameled wire over a 1-in outside diameter piece of PVC pipe or tubing Next, we have the so-called longwire antenna I use the term so-called because not all long wire antennas are truly longwires A true longwire is longer than two wavelengths at the lowest frequency of operation In Fig 8-6 we see a longwire, or random-length, antenna fed from a tuning unit If the antenna length L is greater than a quarter-wavelength, then the tuner consists of a single series capacitor (see below); and if it is shorter than a quarter-wavelength, the tuner is a series inductor The standard tuner for this type of antenna, regardless of length, is a simple L-section coupler (also shown), which can be selected for L-section, series-L or series-C operation The Windom antenna (Fig 8-7) has been popular since the 1920s Although Loren Windom is credited with the design, there were actually a number of contributors Coworkers with Windom at the University of Illinois were John Byrne, E F Brooke, and W L Everett, and they are properly cocredited The designation of Windom as the inventor was probably due to the publication of the idea (credited to Windom) in the July 1926 issue of QST magazine Additional (later) contributions were rendered by G2BI and GM1IAA (Jim MacIntosh) We will continue the tradition of crediting Loren Windom, with the understanding that others also contributed to this antenna design The Windom is a roughly half-wavelength antenna that will also work on even harmonics of the fundamental frequency The basic premise is that the antenna radiation resistance varies from about 50 to about 5000 , depending upon the
Copyright © OnBarcode.com . All rights reserved.