ARRL Radio Designer was published by ARRL beginning in late 1994. It was discontinued in August 2000 and is no longer available.
A subset of the industry-standard linear circuit-analysis program Super-Compact from Compact Software, ARRL Radio Designer is a Windows(TM)-based computer program that simulates and analyzes the performance of passive and small-signal-ac radio and electronic circuitry.
Since ARRL Radio Designer was first published, Compact Software has been acquired by Ansoft Corporation, and Super-Compact has been replaced by Serenade, an integrated software suite for RF and microwave design. Ansoft Corp. offers a student version called Serenade SV for personal, noncommercial use. Serenade SV offers many of the features of ARRL Radio Designer (and more) in a more modern software package. You can find out more about Serenade SV and download a free copy from Ansoft's Serenade page. ARRL is not affiliated with Ansoft Corp. We provide this information as a service for ARRL members who are interested in circuit modeling software, but cannot offer support for Serenade SV.
ARRL's Electronic Publications Branch handles front-line technical support for ARRL Radio Designer; the latest ARD README file is essential reading; and the ARRL Radio Designer file site (also accessible via FTP at the Web address ftp://ftp.arrl.org/pub/ard/) provides example ARD circuit and report files.
ARD coverage in ARRL publications includes QST's bimonthly Exploring RF column, which ran in QST from January 1995 to September 1996, available in Portable Document Format form.