This device is designed for quantitative investigations of the typical properties of a gas-filled triode, recording the IA - UA characteristics of a thyratron. Observe independent and dependent discharges, as well as discontinuous energy release of He atoms during inelastic collisions with free electrons. The Tube Holder (WLS-1802-62) and 500 VDC Power Supply (WLS-1799-15) are required, and available separately. Size: 12 x 12 x 25cm; weight: 1.3 lbs. Specifications: Cathode heating voltage: Uh < 7.5 V, Ih < 3 A Anode voltage: Ua < 300 V Grid voltage: -300 V < Ug < 300 V