MODEL 4042/3: COUPLING TRANSFORMER

Model 4042 is our largest coupling transformer, with eight secondary taps rated to 8kVA. The 8 taps on the 4042 allows the user to adjust the injection voltage and current to a desired value via individual tap settings whose impedance ranges from 1 to 80 Ohms.

When the correct tap is chosen and the tap menu settings on the injection unit is set to the same value, the amplifier will see a large reflected load and will deliver maximum power through this tap to drive current around the earth loop.

As with the lower power units, the primary of the coupling transformer is driven by the Model 4041 injection unit up to a nominal 320V. The various secondary taps on the 4042 translate the input from the injection unit to an output voltage range from 90V to 800V.

Each tap on the coupling transformer is connected to a feedback circuit which constantly senses the earth loop’s voltage and current/load. The injection unit uses this data to maintain a constant injection current at maximum power.