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RF Power Stages

Exchangeable Power Stages for the Modular RF Generator

Jump to: Technical Data

The RF power stage is a power oscillator with a variable output voltage. The operation frequency is given by a built-in resonant circuit. The symmetry of the output voltage can be adjusted by a rotary capacitor at the front panel.

The RF output voltages of the module can be independently biased by different DC voltages. The required voltages can be connected to two BNC sockets at the front panel. To control the DC bias voltages, an external power supply is required. For this purpose, our signal amplifiers were developed.

The control electronics of the power stage is supplied by a special power supply unit. The RF amplitude is controlled by regulating the supply voltage of the output transformers of the power stage. This voltage is provided by the module for controlling the RF amplitude (HV Control).

General Technical Data for all Power Stages


  • Exchangeable power stages for the modular radio frequency generator
  • Adjustment of the symmetry of the output voltages
  • Control of the DC bias voltages of the output signal


  • DC inputs: 50 Ohm BNC sockets
  • DC bias voltage (DC Input): ±200 V max.
  • Capacitance of the DC inputs: 720 nF typ.
  • Surge protection: 200 V Transil diodes


  • RF outputs: 50 Ohm MHV (H4) sockets
  • Output frequencies: 0.5 MHz  2.0 MHz
  • Amplitude of the output signal (each output against ground): 0500 V typ.
  • Required capacitive load per output against ground: 130 pF typ.
    (consisting of 60 pF for the capacitance of the load incl. connector and 70 pF for the connection cable)
  • Regulation of the symmetry: ±20 pF


  • Metallic 19" plug-in unit
  • Dimensions:
    • Width: 54 HP
    • Height: 6 U
    • Insertion depth: 221 mm
  • Color:
    • Front panel: naturally anodized
    • Case: transparently passivated

Block Diagram of the RF Power Stage

Block diagram

See also

  • Technical data specific to each power stage: see sidebar menumenu at the top of the page The menu shows all currently available power stages. If you are interested in a power stage for different frequencies and amplitudes, do not hesitate to contact us.