The 8494G/H, 8495G/H, and 8496G/H are 50-ohm coaxial programmable step-attenuators. Each attenuator is composed of three or four attenuator sections connected in cascade. Each section consists of a precision, thin-film attenuator card, a lossless thru-line, and a ganged pair of solenoid-actuated slab line transmission lines. The slab lines are flexed by the solenoid plungers to make contact with either the attenuator card or the thru-line. The slab line contacts are gold plated leaf springs which ensure long life and extremely high repeatability.