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ARRL Handbook Reference

2018 Edition

  • Overview and Directions

    This web page is for information that extends or supports the ARRL Handbook.  The section for each edition contains links to software referenced in the book, supplemental information and links, and errata and corrections. 


    To purchase the book, click here or browse to the ARRL Store where you can also find numerous other technical publications supporting Amateur Radio.


    Information in support of previous editions can be found at
    ARRL Handbook - 2010-2017 Editions.


    Printed-circuit boards for many current and previous Handbook projects are available from FAR Circuits.

  • Software Utilities

    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.


    Chapter 21 - Antennas


    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.  The new code fixes that problem.


    Click on the program name to download the new program as a zip file, GAMMAMW4.  It is a simple text-based application that runs in a command prompt (C:\) window and does not require a full Windows installation procedure.  Unzip (extract) the program and double-click it to launch it.


    To use the program, you will need to know:
    - frequency of operation in MHz
    - feed point impedance of the antenna's driven element in R + jX form
    - feed line characteristic impedance
    - the driven element diameter (D)*
    - the gamma rod diameter (d)*
    - spacing between the outer surfaces of the driven element and the gamma rod (S)*

    Enter these values and the program will provide complete outputs including supporting parameters.  * - all dimensions must be in the same units, typically inches or cm.


    The ARRL extends its thanks to N6WM for his contribution, as well as to Greg Ordy W8WWV for making some tests of the code.

  • Supplemental Information, Files, and Links

    Chapter 2 - Electrical Fundamentals


    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.


    Chapter 22 - Component Data and References


    Guy K2AV contributes the following information about powdered-iron toroids from various sources to supplement the information in Table 22.16:


    8 Mix    (Yel/Red)      1-50 MHz, u=35 replaces mix #6
    18 Mix  (Grn/Red)    1-50 MHz, u=55, low core loss, similar to mix #8
    40 Mix  (Grn/Yel)       Power conversion similar to mix #26
    52 Mix  (Grn/Blu)      dc-1 MHz, u=75, high permeability

  • Errata and Corrections - 2018 Edition

    Chapter 24 - Station Construction


    Figure 24.16 - the photo credit should go to Bob Lee, WØGXA, and the shelving is actually at the station of Toni Radebaugh, NØNI.