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.
Commercial Driver Licenses (CDL). CLASS A: Trucks or truck combinations weighing with a Gross Vehicle Weight Rating of 26,001 lbs. or more, provided towed vehicle is more than 10,000 lbs. CLASS B: Straight trucks weighing 26,001 lbs. Gross Vehicle Weight Rating or more.ll CLASS A, B, C licenses issued by the 50 states will have their:  1 CDL or.  2 Commercial Driver License on the front of the license. 3  All CMV drivers, nationwide, must possess the appropriate class of license, issued by their state of residency, on or after April 1, 1992.