Controlled amplifier of output RZW 23

The REGONIK RZW-23 controlled amplifier of output is designed for amplifying the low-frequency signal from the REGONIK VRU broadcasting switchboards for loudspeakers placed in the passenger area of the carriage. They are a part of the REGONIK VRZ Train broadcasting system, that meets the conditions of the international UIC 568 standard.

The original solution of the REGONIK company consists in the allocation of the overall low-frequency output necessary for the vehicle, into small and simple controlled of output amplifiers 3VA or 1VA, that are placed as close to the loudspeakers as possible. They make use of the voltage-controlled output amplifier (VCA), whose amplification can be controlled by a change of the undirectional CONTROL voltage. A MUTE function securing (muting for eliminating the acoustic feedback) has been added to the amplifier at the required places in the train, for securing the unification and universality of an amplifier with a volume control. It is possible to choose the required functions of the amplifier by the right connection of the contacts of the connector.

The advantages of allocating the output to more amplifiers are:

  • simple volume control without any interfering events
  • very little output losses on line wires
  • simple and effective filtering out the unwanted interfering signals
  • easy prevention of the acoustic feedback
  • negligible decrease of the overall output when one of the amplifiers is damaged or malfunctioning
  • preserving the functionality of the broadcasting device if multiple amplifiers ale damaged or malfunctionig

Function and technical parameters:

  • asymmetric input of the amplifier
  • input resistance min.40kOhm
  • nominal input of voltage 2,0V
  • load resistance min. 8 Ohm
  • harmonic distortion max. 1%
  • signal/noise interval with short-circuited input better than 60dB
  • frequency response 100Hz to 10kHz ±3dB
  • secured protection of the amplifiers´output against a short circuit
  • secured protection against reversal of the poles of supply voltage
  • input control:
    • input voltage 0,07V÷4,5V
    • protection of input up to 32V
  • operating temperature -30°C to +60°C
  • size h=120, w=75, d=40 (without admissions)
  • weight 0,3kg without accessories

In this category

Train radio appliance VRZ 21
 

It is designated for all types of passenger vehicles and meets the demands of UIC 568. The VRZ 21 permits:…

Train broadcasting switchboard VRU21C/CK, SRU21C/CK, RRU21C/CK

Carriage broadcasting switchboards REGONIK VRU21C and VRU21CK are designed for use in all types of railway carriages (large space carriages,…

Talkback speech unit HHJ22V
 

Talkback speech unit REGONIK HHJ22V is designed for railroad track vehicles that are equipped with a Train radio device according…

Modular train radio switchboards RRU250M, VRU250M, SRU250M
 

Designation: TRAIN RADIO SWITCHBOARDS REGONIK XRU250M are modular switchboards designed for railroad track vehicles, compact engine and electrical units for…