Module 22 - MECHANICAL SAFETY
Read Chapter 9, Pages 9-11 to 9-14 in your text before you continue.
Mobile Installations. Secure all equipment. Place equipment where you can operate it safely while driving
Antenna installation. Clear of trees and power lines. If it falls it won't hit anyone or cross power lines. The minimum safe distance you should allow from a power line when installing an antenna is that if the antenna falls unexpectedly, no part of it can come closer than 10 feet to the power lines.
You should never attach an antenna of any kind to a utility pole because the antenna could come in contact with the high-voltage power wires.
A comprehensive article on installing an antenna in a tree can be found by clicking ANTENNA INSTALLATION IN TREES
Rohn makes telescoping masts, towers, and more. For lots of information on installing a Mast for an antenna, Click INSTALL A TELESCOPING MAST ON A ROOF. A mast can be used for Directional Beam Antennas or a Vertical antenna.
Tower climbing considerations. Proper clothing, hard hat and eye protection. Climbing harness. Gin pole: used for lifting tower sections and antennas. Don't climb a crank-up tower supported by its cable. This type of tower must never be climbed unless it is in the fully retracted position Don't work alone. When should members of a tower work team wear a hard hat and safety glasses At all times when any work is being done on the tower
Tower erection information is detailed here Roger's Tower Erection Project.
A very handy accessory is the 'Gin-Pole' which is used to erect a tower. You simply attach the gin-pole to the section on top at the time. Now you have a 6-8 foot extension with a pulley on the top. You attach a rope running through the pulley to just above the middle of the next section to be raised. Now a helper on the ground can raise this section into the air. The climber on the tower now can easily guide the new section right above the existing top section. When the section is in place, the ground person slacks off on the rope and the tower person lines up the holes in the two section legs and attaches the coupling hardware. Now the gin-pole can be removed and moved to the new top section. Pretty slick accessory
Separate eight-foot long ground rods for each tower leg, bonded to the tower and each other
A good ground system is an essential part of a good ham station for various reasons. First and foremost, grounding is for the safety of your family, home, and ham equipment. Lightning not only destroys ham radios, but often starts house fires, thereby jeopardizing the safety of your family. An elevated antenna or a tower protruding into the atmosphere naturally increases the odds of a lightning strike. Statistically, most lightning damage comes from the AC power or telephone lines running into your home.
Your quiz will tell you what information you need to know. Pass the quizzes - pass the exam!
Tips on how to remember the correct answer are included.
You can take the quiz as often as you wish.
No one but you will see the quiz results.
Review the Term Glossary in Chapter 10 of your Ham Radio License Manual
Practice Exams are available at www.arrl.org/exam-practice and there are links to many other test practice sites also.