Hier angeboten ist die 2-kanalige Stromversorgung
von Brüel & Kjaer Modell 2803.
Sie dient der Versorgung von Mikrofonvorverstärkern.
Die Eingänge und Ausgänge können durch einen einzigen Schalter getauscht werden.Eine vergrößerte Abbildung befindet sich hier.
English translation of German description:
The Two-Channel Power Supply Type 2803 is intended for use in connection with two of the B & K cathode Followers Type 2612-13-14-15.
It delivers anode, filament and polarization voltages, and converts the output impedance of the cathode followers into a much lower impedance, this being necessary when very long cables have to be used between the microphones and the succeeding amplifier.
It will allow the use of two channels simultaneously, or enable switching either manually or automatically between the two channels to one set of recording instrumentation connected to the output. Both channels may be conditioned to any desired level between 0 and -40 dB rel. to the nominal sensitivity of the input transducer. The resolution is very high close to 0 dB but decreases considerably however at -40 dB.
The Two-Channel Power Supply can also be used as an impedance converter for the B & K vibration pick-ups when used in conjunction with one of the Cathode Followers 2612-13-14-15-17. This gives a conversion of impedance from 300-1200 Mohms (depending on the type of cathode follower) to 15 ohms in series with 5 µF, which is the output impedance of the Two-Channel Power Supply, thereby allowing remote monitoring of the pick-up output.
The Two-Channel Power Supply Type 2803 contains a built-in automatic channel selector which is able to connect the two input signals alternately to the output at a recurrent frequency of approximately o.5 Hz. The switching can also be controlled externally for instance by means of the Level Recorder Type 2305 or simply by grounding an external control lead.Please find an enlarged image here.