Universal Voltronics BAM-2-400 High Voltage DC Power Supply 2kV 400mA

Universal Voltronics BAM-2-400 High Voltage DC Power Supply 2kV 400mA

The Universal Voltronics BAM-2-400 is a benchtop high voltage DC power supply rated for 2,000V (2 kV) at up to 400 mA output. It features selectable output polarity (positive, negative, or transit), a front-panel rotary voltage control, and dual analog panel meters for simultaneous monitoring of output voltage and current. This unit powers on but produces very low output voltage and is not functioning to its rated specification — it is being sold AS-IS for parts or repair only.

Specifications & What's Included

• Manufacturer: Universal Voltronics Corp., Mount Kisco, NY
• Model: BAM-2-400
• Serial Number: 9-6-3641 (internal reference)
• Output Voltage: 2 kV (2,000V) DC
• Output Current: 400 mA
• Polarity: Selectable — Positive, Transit, or Negative via front-panel rotary switch
• Voltage Control: Front-panel rotary knob, scaled 0–100%
• Panel Meters: Two large analog meters — DC Volts (0–2,500V) and DC Milliamperes (0–500 mA)
• Fuse Holders: Three front-panel fuse positions — Main, Primary, Control
• HV Controls: Check Interlocks indicator lamp, H.V. ON indicator lamp (red), H.V. OFF pushbutton, H.V. ON pushbutton
• Rear Panel: Ground binding post and AC input terminal block
• Form Factor: Benchtop cabinet with mesh ventilation panels
• Internal Components: Large mains transformer, high-voltage multiplier/rectifier assembly, stacked ceramic capacitor bank, high-voltage resistor stack (green), red HV capacitor block, blue interconnect wiring
• Includes: Unit with output cable as photographed

Applications

Universal Voltronics was a well-regarded American manufacturer of high voltage DC power supplies from the mid-20th century through the 1990s, known for their use in scientific research, particle physics labs, university physics departments, and industrial instrumentation. The BAM series supplies were used to bias photomultiplier tubes (PMTs), Geiger-Müller detectors, and other radiation detection instruments; to power electrostatic deflection systems; and as general-purpose high voltage bench sources in R&D settings. The selectable polarity feature makes this type of supply useful for both positive and negative HV applications. Hobbyists, restorers, and technicians working with vintage HV equipment or detector systems still seek these supplies as platforms for repair or as sources of serviceable internal high-voltage components such as multiplier stacks, transformers, and capacitor assemblies. This particular unit, which powers on but does not produce rated output, is best suited as a parts or repair candidate.