EZNEC ARRL is a special version of EZNEC software included on the ARRL Antenna Book CD. It operates as a normal EZNEC demo program, but when a specially signed EZNEC description file is loaded, it becomes a fully functional standard type EZNEC program.
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 v. 3.0 is included with the 20th Edition and EZNEC-ARRL v. 4.0 with the 21st Edition. It operates as a normal EZNEC demo program except when a specially "signed" EZNEC description file (included on the Antenna Book CD) is loaded. When analyzing a "signed" file, EZNEC-ARRL becomes a fully functional standard type EZNEC program. Both EZNEC-ARRL v. 3.0 and EZNEC-ARRL v. 4.0 will function with "signed" files from any Antenna Book edition
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