TRIODE VALVE CHARACTERISTICS APPARATUS WITH DC REGULATED POWER SUPPLY – GUPTA BRAND 200202 Posted on February 26, 2017May 2, 2017 by admin Objective : VI Characteristics of Triode Valve at various Grid voltages. Features : Instrument comprises of DC Regulated Power Supply 0-300VDC/ 30mA & 0-15VDC/10mA, AC Power Supply 6.3 VAC/1Amp, two round meters for voltage & current measurement