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Adjustable Pin Wrench by Ron of Va -- An adaptation of an adjustable wrench to function as pin wrench. The pins are a light press fit into holes drilled through the sides of the wrench's jaws, providing a further adjustment in pin depth. http://www.homemadetools.net/homemade-adjustable-pin-wrench

Adjustable Pin Wrench by Ron of Va -- An adaptation of an adjustable wrench to function as pin wrench. The pins are a light press fit into holes drilled through the sides of the wrench's jaws, providing a further adjustment in pin depth. http://www.homemadetools.net/homemade-adjustable-pin-wrench

Quadrifilar helicoidal antenna - Javascript on-line calculator

Description of the construction of a quadrifilar helicoidal antenna. This model is for meteorological satellites, but a calculator is provided to adapt measure to other frequencies.