Double Cross Dipole Connectors
thingiverse
These are the joints for a double cross dipole antenna designed to receive circularly polarized radio waves with ease. I specifically use this setup to receive signals from NOAA weather satellites as they pass overhead in clear visibility. The antenna elements themselves consist of 5/8 inch copper tubing, which is attached to the antenna holders using 3/8 inch copper couplers. These couplers feature a crimp near the end, ensuring a secure friction fit that prevents the bottom elements from falling out easily. The coax is soldered directly to them for added stability. A detailed connection diagram can be viewed in the source PDF. The antenna holders are securely attached to the antenna hub using PVC pipe stiffened with a wooden dowel of equal diameter. Holes are drilled into both ends at 30°, positioning the elements at that precise angle. Each connection is reinforced with a screw and bolt for added support. For reference, I followed this PDF guide to build my double cross dipole antenna: https://www.qsl.net/l/lu7did/docs/NOAA/DoubleCross_137Mhz%20AntennaMARTES.pdf Please note that the picture orientation gets distorted in Thingiverse's image viewer. If you need accurate part orientation, enlarge the image and click view original for correct alignment.
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