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.
CDL Class B License Endorsement. A Class B vehicle is defined as a single vehicle with a GVWR of at least 26,001 pounds and any such vehicle towing another not weighing more than 10,000 pounds. Class B CDL is covered in the following sections from the CDL handbook: 1  Section 1 - Introduction. 2  Section 2 - Driving Safely.