A integrated flue support construction (2) for a Marx impulse voltage generator (2) with several generator stages (3) is disclosed. It has been known to arrange a flue (2) for flushing the air of switching spark gaps (4) separately from a support frame for the switching spark gaps (4), the impulse capacitors (5) and series and parallel resistors (7, 8). According to the invention, the flue (2) has a supporting function for the switching spark gaps (4) and individual or all electrical components (5-10) of the impulse circuit. In one embodiment the flue (2) consists of a triangular cylinder support structure (2), wherein the side walls (11) are formed by insulating plates (11), each receiving one of the electrical components, namely the switching spark gap (4), impulse capacitor (5) and resistors (7, 8). Advantages of the invention are: a less complicated construction and a saving of costs, a more compact design with smaller flue cross section area (22) and thereby smaller self-inductance of the impulse circuit as well as easier production, transportability and handling because of stacked modules (14) each with at least one generator stage (3).
