Amateur Extra Class Lesson 11.2, RF Exposure, 11th Edition

Here’s your video introduction to Section 11.2, “RF Exposure,” in the 11th Edition of the ARRL Extra Class License Manual for Ham Radio.

You can find a complete list of the Amateur Extra videos by clicking here, or click here to go to the YouTube Amateur Extra playlist. Please post your questions either below or on the YouTube page for this video. Good luck in your studies!

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3 Responses to Amateur Extra Class Lesson 11.2, RF Exposure, 11th Edition

  1. Brent Johnson KI5HXM says:

    I am Brent Johnson, KI5HXM, recently licensed as Tech & General in January 2020. My question is relating to RF exposure in a mobile environment. The ARRL tool for RF exposure puts FM in the 100% duty cycle which seems excessive. The minimum distance is like 3.5 feet at VHF/UHF. So even with 1.5 feet operating at SSB the minimum distance is around 1.5 feet. So my question is where do I mount a 2m/70cm dual band antenna on my vehicle (pickup). I cant assume that the pickup roof of metal is going to protect passengers so the roof is not an option as I can understand it.

    My dilemma is this: the best radiation pattern is in the center of the vehicle but it seems to violate the RF safety per the ARRL calculator. So do I move it 3.5 feet forward or behind the cab?

    Thanks for any answer you can provide. I appreciate your channel, thanks for all you do for Ham Radio! 73 de KI5HXM

  2. Mark Herron says:

    Fantastic ! I passed my General Exam today and just love learning more ! You are a great communicator and presenter – thank you

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