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Excellent Quad Antenna projects for 40 20 17 12 10 and 6 meters band in this pdf file project by Pfeiffer Maltese. The Pfeiffer Maltese Quad Antenna System takes on the structural challenges of traditional cubical quad antennas using a linear loading approach to reduce size while preserving performance. Andrew Pfeiffer created the pattern, which resembles a Maltese cross and enhances endurance in tough conditions. The system progresses through numerous configurations, from the 4-spreader Maltese Quad to the 16-spreader Maltese Quadruple-Cross, greatly lowering antenna size while retaining efficiency over several bands, including 12 to 40 metres.