===== Ham College 74 - Extra Class Exam Questions – Part 12 =====

**Show Hosts** 
      * George Thomas (W5JDX)
      * Tommy Martin (N5ZNO)

**Topics**
      * E2D Operating methods: VHF and UHF digital modes and procedures; APRS; EME procedures; meteor scatter procedures. 1:07:26

**Questions**
      -E3A01 : [[https://commons.wikimedia.org/wiki/File:Apogee_(PSF).png#/media/File:Apogee_(PSF).png]]
      -E3A02 : [[https://www.dxmaps.com/emelibration.html]]
      -E3A03 : [[http://www.arrl.org/the-sun-the-earth-the-ionosphere]]
      -E3A04 : [[https://dxinfocentre.com/tropo.html]]
      -E3A05 : [[http://www.arrl.org/files/file/Technology/tis/info/pdf/030708qex003.pdf]]
      -E3A06 : [[https://www.fourmilab.ch/cgi-bin/Earth/action?opt=-p]]
      -E3A07 : [[https://upload.wikimedia.org/wikipedia/commons/a/a2/Climatology_of_ground-based_radio_ducts_%28IA_jresv63Dn1p29%29.pdf]]
      -E3A08 : [[http://www.arrl.org/files/file/QST%20Binaries/nt0z.pdf]]
      -E3A09 : [[http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/QS04-53-Peterson_opt.pdf]] 
      -E3A10 : [[https://www.arrl.org/files/file/LabHandbook/RLH%20Unit%202.pdf]]
      -E3A11 : [[https://www.voacap.com/hf/]]
      -E3A12 : [[http://www.spaceacademy.net.au/env/spwx/spwxtute.htm]] / [[https://www.swpc.noaa.gov/products/aurora-30-minute-forecast]]
      -E3A13 : [[https://www.electronics-notes.com/articles/ham_radio/amateur-propagation/auroral-propagation.php]]
      -E3A14 : [[https://en.wikipedia.org/wiki/Circular_polarization]]

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