EZNEC-ARRL Information


This page is provided for informational purposes only. EZNEC-ARRL is not one of my commercial products. It was donated to the ARRL, and I receive no monetary benefit from it. Please contact the ARRL if you have any additional questions about the program, its installation, or its use, or about the ARRL Antenna Book.

EZNEC-ARRL is a special version of EZNEC which is included on the ARRL Antenna Book CD. Its primary purpose is to enable viewing and analysis of the example antennas included with the Antenna Book. EZNEC-ARRL v. 3.0 is included with the 20th Edition, EZNEC-ARRL v. 4.0 with the 21st Edition, and EZNEC-ARRL v. 5.0 with the 22nd Edition. It operates as a normal EZNEC demo program except when a specially "signed" EZNEC description file (included on the Antenna Book CD) is opened. When analyzing a "signed" file, EZNEC-ARRL becomes a fully functional standard type EZNEC program. "Signed" files can be modified in any way and analyzed with full standard EZNEC program capability. However, EZNEC-ARRL will revert to demo operation when any file saved by EZNEC-ARRL, including a modified "signed" file, is re-opened. Any version of EZNEC-ARRL will function with "signed" files from any Antenna Book edition, and all files are compatible with all EZNEC program types. No other "signed" files are available except the ones furnished with the Antenna Book, and EZNEC-ARRL can be obtained only by purchasing the Antenna Book.

If you are an EZNEC-ARRL v. 5.0 user, you can update your program to incorporate the latest bug fixes and manual revisions by downloading and installing the latest EZNEC v. 5.0 demo. After running the demo program installation, your program will still operate as the ARRL version rather than a plain demo, and it will be updated to the latest revision.

If you are an EZNEC-ARRL v. 4.0 user, you can update your program to incorporate the latest bug fixes and manual revisions by downloading and installing the latest EZNEC v. 4.0 demo. After running the demo program installation, your program will still operate as the ARRL version rather than a plain demo, and it will be updated to the latest revision.

If you are an EZNEC-ARRL v. 3.0 user, you can update your program to incorporate the latest bug fixes and manual revisions by downloading and installing the latest EZNEC v. 3.0 demo. After running the demo program installation, your program will still operate as the ARRL version rather than a plain demo, and it will be updated to the latest revision.

Installing the EZNEC v. 5.0 demo will not update or interfere with earlier versions of EZNEC-ARRL. There is no way to upgrade EZNEC-ARRL to a later version except by purchasing a later edition of the ARRL Antenna Book and installing the later EZNEC-ARRL version.

Because EZNEC-ARRL is not a commercial EZNEC product, there is no EZNEC-ARRL upgrade discount for purchasing a commercial EZNEC program.


Phased array feed system design program Arrayfeed1 was developed for the the 21st Edition of the Antenna Book and is included on the Antenna Book CD. Click here to download the latest revision.

System requirements are the same for EZNEC-ARRL as for other EZNEC program types.

For more information about EZNEC-ARRL
or the ARRL Antenna Book , visit http://www.arrl.org or contact the ARRL directly.