3 element 2m (145 MHz) ultra portable yagi

thingiverse

Tape Measurement Yagi Weight: A Whopping 170 Grams Only! Perfect for backpacking, its longest component measures a mere 530 millimeters. Deployment is quick and hassle-free. Suitable for both portable operation and Summit On The Air (SOTA) enthusiasts. Polarization options include horizontal or vertical settings. However, users are advised to steer clear of using this device in windy weather conditions. Instructions The design lends itself to easy printing, although users might need to tweak the boom diameter to fit their requirements. Components Required: PVC pipe with a 25 mm diameter and length of 530 mm Measuring tape with a width of 12 mm and length of 3 meters M3 screws measuring 10 mm in length M3 nuts Coaxial cable equipped with connector Magnets, 8 mm in diameter Dimensions (as per DK7ZB's design): Director Length: 916 millimeters at Position 470 millimeters Radiator Length: 1014 millimeters at Position 300 millimeters Reflector Length: 1036 millimeters at Position Zero Millimeters Note that the radiator is split into two parts, with a 5 mm gap separating them. Coaxial cable is directly soldered to the radiator. For optimal results on mid-band frequencies, users might need to adjust (by a margin of 1-2 mm) the radiator length.