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 B (car) licences can be used to drive vehicles with GVWRs of not more than 3500 kg (7700 lb) and a trailer with GTWRs not exceeding 750 kg (1650 lb) , while holders of class BE licences can tow trailers with GTWR greater than 750 kg.