KerberosSDR 70cm Array

thingiverse

This is a suction-cup mounted antenna array for use with the KerberosSDR coherent receiver system, designed to operate on the 70cm band. The airfoil design of this antenna keeps it firmly attached to the vehicle and has been thoroughly tested over many months at high speeds while installed onto a glass roof. It prints well using PLA, but consider switching to PETG or ABS for high-temperature operation. Assembly is straightforward, with an included parts list making it easy to follow. The adhesive copper disks required for small helical rubber ducky antennas can be cut out using a hobby vinyl cutter. The KerberosSDR system will easily track a 5W 70cm transmitter from 3 miles away using the small antennas, but bigger antennas may work better while potentially affecting the structure at higher speeds. The wire loom keeps wiring organized, and if it doesn't snap together well, use two small zip ties to secure it. The SMA holder is useful for creating a quick disconnect during calibration. TIP: Let KSDR operate for several minutes before calibrating to reduce drift, and check its calibration periodically. Installation on the vehicle involves cleaning the area (glass preferred), moistening suction cups, and installing them in an N-S orientation with N pointing towards the front of the vehicle. For usage with the KSDR Receiver, use a spacing of 0.2m for 70cm operation only; for 2m operation, use the 3rd harmonic frequency. Happy Hunting!!