Power Supply 19"-PSU-B-2.150
Double Variable Bipolar Precision Power Supply 2× ±150 V / 300 mA

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This device contains two identical, completely independent, remote-controllable bipolar precision power supplies. The power supplies are linear and have toroidal transformers which ensure a low residual magnetic field.

Each of the power supplies generates two symmetrical output voltages which are continuously adjustable from 0 to nominal voltage. The symmetry of the voltages is better than 0.1%, the output ripple and noise voltage of the output voltages are in the ppm range.

Both power supplies have independent reference potentials, the outputs are galvanically isolated from the device (i.e. from protective earth) and can therefore be connected to freely selectable potentials.

Each of the power supplies can either be controlled manually by a precision potentiometer with 10 turns or externally by a DC voltage of 010 V. The control voltages are applied to two BNC sockets which are galvanically connected to the device. Switching between manual and external control is possible for each power supply independently via a toggle switch.

The power supplies are protected against excess voltage, excess current and excess temperature.

Typical applications: Supply of power amplifiers, supply of radio frequency generators

Technical Data


  • Two linear bipolar precision power supply units
  • Manual or external control of the output voltage
  • Low noise voltage and output ripple
  • Guaranteed symmetrical output voltages
  • Protected against short circuits, excess voltage and excess temperature
  • 19" case


  • Connectors: two 50 Ohm BNC sockets (VIN)
  • Input voltage: 0  +10 V
  • Input impedance: 47 kOhm
  • Manual control: two precision potentiometers with 10 turns
  • Accuracy of the amplification: 0.3%
  • Temperature coefficient of the amplification: 25 ppm/K
  • Offset voltage: 20 mV


  • Connectors: three 50 Ohm SHV sockets per PSU
  • Voltages: continuously adjustable in a range of 0 to ±150 V (the negative and positive output voltages are equal)
  • Surge protection: 150 V
  • Permissible voltage at the positive output with respect to device ground: max. 1.5 kV~, or ±2.1 kV
  • Current: max. ±300 mA, electronically limited
  • Current measurement: three-digit digital display, accuracy: ±1.5%, resolution: 1 mA
  • Asymmetry of the output voltages: < 0.1% or 1 mV (the greater of the two values)
  • Output ripple and noise voltage (0.1 Hz  500 kHz): < 150 µVeff, < 1.5 mVpp
  • Line regulation: < 5 ppm at 10% change of the line voltage
  • Load regulation: < 100 ppm at 100% load change
  • Transient load regulation: 50 µs at 50% load change
  • Temperature coefficient of the output voltage: < 50 ppm/K

Line Input

  • Nominal voltage: 230 V or 115 V ±10% (changeable by a voltage selection switch)
  • Nominal frequency: 50/60 Hz
  • Power consumption: 250 VA at full load, 10 VA without load


  • Cooling: extruded heatsink on the rear panel with to 60 mm fans
  • Fan control: proportional controller
    • Control behavior: 150 rpm/°C
    • Control threshold: 30°C
    • Rotation speed at low temperatures: 900 rpm
  • Shutdown threshold of the temperature monitoring: 50°C
  • Dimensions:
    • 2 HU 19" plug-in unit for mounting in a 19" cabinet
    • Height: 88 mm
    • Width: 483 mm
    • Installation depth with heatsink and fans: 359 mm
  • Weight: 8.7 kg


User Manual

Beschreibung-1.00_A.pdf Beschreibung-1.00_A.pdf, 1620 KB: Download the user manual (currently only available in German)
Information on how to open the various file formats can be found here.

Additional Information

Shipment Contents

  • Power Supply 19-PSU-B-2.150
  • Line cord (universal IEC mains lead, length 1.8 m)
  • Material for mounting in a 19" cabinet
  • Replacement fuse
  • User manual (see above)


Coaxial cables
BNC, SHV, MHV, and combinations
(Not part of the shipment, please order separately)