ARRL Centennial Convention Issue! See page 13 for a list of Convention highlights. Register now to attend the ARRL National Centennial Convention in Hartford, Connecticut, July 17-19, 2014 – ARRL2014.org

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In this issue…
• Bring true linearity to a Collins S-Line S meter.
• Learn how to use an ordinary oscilloscope for sophisticated amplifier testing.
• Build a classic ribbon microphone.
• Discover the fascinating life of ARRL co-founder Clarence Tuska
… and much more.

Enjoy Content You Won’t See in the Print Edition . . .

 • See a video overview of the Icom IC-7100 HF/VHF/UHF transceiver.
 • See expanded IC-7100 VHF/UHF key measurements
 • Listen to a rare audio recording of Clarence Tuska as he describes the origins of the ARRL.