1 Chapter 11 “Safety” Steve Irick, WB9DUS Discussion Leader

2 Chapter 11 Hazardous Materials

E0A09 Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled? Uranium Hexaflouride Beryllium Oxide Zinc oxide Mica 3

Chapter 11 RF Exposure 4

E0A02 When evaluating exposure levels from your station at a neighbor’s home, what must you do? Nothing; you need only evaluate exposure levels on your own property Advise your neighbors of the results of your tests 5

E0A02 (Cont.) Make sure signals from your station are less than the controlled MPE limits Make sure signals from your station are less than the uncontrolled MPE limits 6

Chapter 11 RF Exposure (Cont.) 7

E0A03 Which of the following would be a practical way to estimate whether the RF fields produced by an amateur radio station are within permissible MPE limits? Use a computer-based antenna modeling program to calculate field strength at accessible locations 8

E0A03 (Cont.) Use a calibrated antenna analyzer Use a hand calculator plus Smith- chart equations to calculate the fields Walk around under the antennas with a neon-lamp probe to find the strongest fields 9

Next Class Session Study Chapter 2 “Operating Practices” Study the Chapter 2 Question Pool questions found in the chapter Blue Boxes e.g. page 2-6 Prepare your Chapter 11 and Chapter 2 Study Guide materials 10