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Updated 1 April ARRL Vendors guide for antenna system materials, components, and services - supplied as a downloadable Excel spreadsheet.
Updated 28 Sep On page , the second paragraph refers to Figure 2. Dimensions for the monoband Yagi hairpin matching inductors are given in the YW file for that antenna.
Scroll to the end of the file to see the hairpin dimensions. Figure The missing figure can be downloaded as a graphic file here.
The feed point attachment hardware is more conveniently assembled with the screw heads on the bottom of the driven element instead of on the top as shown. The coaxial feed line is attached to the halves of the driven element and no connection is made to the boom or other hardware.
The Antenna Book equation assumes that P is the net input power, which on a directional wattmeter equals Pfwd - Prefl, and that none of the reflected power is absorbed by the source such as a transmitter's output stage. In such a case, power is continually "pumped" into the line. If the termination is infinite, such as for a short or open, power is only dissipated by line loss and voltage can become very high.
Advanced Search Search GO. View as: List Grid Show 5 10 15 20 25 All per page. Sort By Position Name Price. Items 11 to 18 of 18 total Page: 1 2. Shop By. Product Categories. Anderson Power Pole. Antennas and Related Products. Cases, Chassis, Enclosures. Circuit Boards. Circuit Breakers. Coax Seal. Coax Wrap. Coils and Coil Form. TXT file is available for download here and the PDF set of installation instructions can be downloaded here.
To install, click on the file name and follow the instructions. All files needed to run the software, along with a tutorial and characteristic curves for many popular amplifier tubes, will be installed in the TubeCalculator folder.
Bill Wortman, N6MW has contributed GAMMAMW4 to correct an error in the previous version of GAMMA in which the software failed to find solutions to the calculations when the combination of the desired feed line impedance exceeds the product of the raw antenna resistance and the gamma step-up value.
This downloadable Radio Mathematics document includes a discussion of decibels and coordinates, along with a list of online tutorials on a variety of subjects that may be encountered when working with radio circuits and equipment.
Guy K2AV contributes the following information about powdered-iron toroids from various sources to supplement the information in Table The complete graphic may be downloaded here. See the Edition - Supplemental Information and Errata page for software utilities and links. Note that the website for downloads will also download a Google Chrome extension and two McAfee security applications unless you opt out by unchecking the necessary boxes.
Joe updated material in Chapter 23 - Construction Techniques and has made regular improvements to the chapter over the past few editions. Figures In the passive filter, C3 is 1.
C4 is 3. C5 is 1. The correct schematic is downloadable as a JPEG file here. Both components are properly labeled in the schematic. It should be noted that the "flat response out to 3 kHz" includes a peak of several dB at Hz mentioned later in the section.
R8A and R8B are actually a 5k pot with the midpoint connected to the wiper contact, similarly to R7. It should read, " The figures A2 and A3 on page Also, the Smith chart figure, which is printed as A3, but should be A2, is in some print copies missing the thin dashed line referred to in the 4th paragraph.
The figure is available here. You can download this collection as a This section is for software utilities and other programsreferenced in the Handbook or which support the Handbook material and are not included in the main download package.
Check the web page for earlier editions for other software. The package of software routines by Phil Karn, KA9Q, are being moved and the new location will be published here when they are again available. The packages are organized in several compressed tar files and there are packages specifically to support the funcube dongle SDR. He has also created a WWV emulator which is included with the software routines.
The software and associated documentation will be updated by KA9Q as time and other interests permit. It can be downloaded here. R1 and R2 are generic values for impedances - either could be the source or the load. As stated on page 5. Section It is included in the downloadable supplemental material for the Handbook. The software is available as part of the downloadable supplemental content with other software from Tonnesoft.
The caption for Figure The third-order IMD products are separated from the tone modulation sidebands by the difference of the audio tone frequencies, 1 kHz in the example, and the fifth-order IMD products by twice that, or 2 kHz. Likewise, 5th-order products closest to the frequencies of F1 and F2 are separated by 5 F1 - F2 , which is 5 kHz in this example.
The entire article and Birnbaum's additional comments are available here. The correct equation is:. Figure 2. The P-channel device should be the upper transistor. This error was present in earlier editions, as well. Section 3. The phase angle for admittance should also be the negative of the equivalent impedance.
He has also created a WWV emulator which is available at www. EXE was omitted from this edition's downloadable set of software. You may download it and the associated PDF documents by clicking here. The tutorial consists of a text-and-figures presentation that explains the concept and process. The presentation is accompanied by an Excel spreadsheet that allows the student to experiment and observe the effects of matching.
Errata and Corrections 22 June The first equation of section 4. It should read:.
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