This is an AAC model 901B-100 DC Current Sensor. According to the specs it will measure 0-100mA at 30kV.
For the actual datasheet from AAC (American Aerospace Controls), click here.
This is an Jennings SPST high voltage vaccuum contactor. According to the label it will handle 200A RMS at 15.5kV RMS.
For the actual datasheet from Jennings, click here.
Both the Current Sensor and the Vacuum Contactor above were removed during the demolition of a local radio station. As far as I know they are working.
This is a Powerstat brand autotransformer, Model 216BU. 240VAC input 2-280VAC output .98kVA. I don't have a knob or the faceplate.
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