The term balun (pronounced bal-un) is derived from the function of the passive device that converts between a BAL anced and UNbalanced electrical signal. Common types of baluns convert 100 Ohm twisted pair (balanced) to 75 Ohm coaxial (unbalanced).
Commercial Driver License (Class A, B or C) A commercial driver license (CDL) is required for drivers of heavyweight vehicles, 26,001 lbs. or more gross vehicle weight rating (GVWR), vehicles hauling a trailer that is 10,001 lbs.
Class A, Class B, Class C and Commercial (CDL) licenses. People 21 years of age or older are entitled to apply for a Class A driver's license. They can also apply for any CDL with a hazardous materials endorsement. Those who have turned 18 can apply for a Class B or Class C driver's license.