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  2. Continuous Tone-Coded Squelch System - Wikipedia

    en.wikipedia.org/wiki/Continuous_Tone-Coded...

    The lowest series has adjacent tones that are roughly in the harmonic ratio of 2 0.05 to 1 (≈1.035265), while the other two series have adjacent tones roughly in the ratio of 10 0.015 to 1 (≈1.035142). An example technical description can be found in a Philips technical information sheet about their CTCSS products.

  3. Amateur radio - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio

    Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. [1]

  4. Amateur radio licensing in the United States - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_licensing_in...

    FCC amateur radio station license of Al Gross. In the United States, amateur radio licensing is governed by the Federal Communications Commission (FCC). Licenses to operate amateur stations for personal use are granted to individuals of any age once they demonstrate an understanding of both pertinent FCC regulations and knowledge of radio station operation and safety considerations.

  5. Amateur radio operator - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_operator

    About three million amateur radio operators are currently active worldwide. [1] Amateur radio operators are also known as radio amateurs or hams. The term "ham" as a nickname for amateur radio operators originated in a pejorative usage (like "ham actor") by operators in commercial and professional radio communities, and dates to wired telegraphy.

  6. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. General radiotelephone operator license - Wikipedia

    en.wikipedia.org/wiki/General_radiotelephone...

    Pass written exam Elements 1 and 3. How to Obtain a License: To obtain a GROL License, one must submit to the FCC, Form 605 and Form 159 with Proof of Passing Certificates for Elements 1 and 3. (Some Commercial Operator License Examination Managers will submit these forms for the applicant.) All exam questions are multiple-choice.

  8. The Fascinating Backstory Behind Red Dye No. 3 - AOL

    www.aol.com/fascinating-backstory-behind-red-dye...

    Both the cosmetic and food bans of Red Dye No. 3 are the result of a single study published in 1987. In the study, male rats fed a diet where the dye made up four percent of the diet had higher ...

  9. Viewer's guide to the new College Football Playoff

    www.aol.com/sports/viewers-guide-college...

    Here's everything you need to know in our viewer's guide to the new College Football Playoff. College Football Playoff first round No. 10 Indiana at No. 7 Notre Dame

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