NOAA Double Cross Dipole (Can be used for ant frequency)

thingiverse

**Antenna for receiving NOAA satellite images** This antenna is tuned for around 137,5 MHz and can be used to receive signals that are left hand polarized around that frequency. *The antenna can be used for different frequencies by adjusting the length of the dipoles, and the spacing between them, as well as the cable lengths.* **Materials** - 2 meters x 16 mm diameter PVC tubing - 4 mm conductive metal rods ( larger ones can be used by drilling bigger holes) - 3 meters coax cable - 1x centerpiece (+ optional lid) - 4x dipole mounts (+ optional lids) - Some way to mount the antenna. I used a camera tripod with the adapter shown here **Wiring Diagram** https://www.qsl.net/l/lu7did/docs/NOAA/DoubleCross_137Mhz%20AntennaMARTES.pdf Page 3 This will tell you the spacing, lengths and tilt. For NOAA, use: - 510 mm long antenna elements - 540 mm spacing from dipole to dipole - 30° tilt counterclockwise - 510 mm longer cables to the E and W dipoles **Additional Information** If you have any questions (or corrections), feel free to ask in the comments. If you like my design, please consider sharing, liking and/or donating to help me be able to create more models.