EZNEC ARRLEZNEC ARRL 
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EZNEC ARRL (EZNEC_ARRL_50_Installer.exe). EZNEC-ARRL is a special version of EZNEC v. 3.0 or EZNEC v. 4.0 which is included on the ARRL Antenna Book CD.
EZNEC ARRL is a unique version of the renowned EZNEC software, available exclusively on the ARRL Antenna Book CD. This specialized software offers the full functionality of EZNEC, with additional features tailored for antenna modeling and analysis.
When you load a specially signed EZNEC description file, EZNEC ARRL transforms from a demo program into a fully functional standard EZNEC software. It’s an ideal tool for amateur radio enthusiasts and professionals alike, providing accurate and detailed antenna simulations in an easy-to-use interface.