SP3OHM: a DIY IceConeFeed on a Triax dish for QO-100

Michał Słomkowski, SP3OHM, is building a QO-100 station in Poland. He printed the IceConeFeed DIY package, wound the helix himself and sent three photos. His report: “I assembled the helix according to your design, works perfectly!”

DIY IceConeFeed on a wall-mounted Triax offset dish at SP3OHM — The feed on a Triax offset dish at Michał’s QTH. (Photo: SP3OHM)

DIY IceConeFeed with the radome removed: copper helix, matching vane, reflector disc and LNB — Radome off: 3.5-turn copper helix, matching vane, reflector disc, LNB behind it. (Photo: SP3OHM)

DIY IceConeFeed with the printed cone radome fitted — Radome on. (Photo: SP3OHM)

The DIY IceConeFeed is the open-source version of our QO-100 dual feed: a 3.5-turn helix for the 2.4 GHz uplink in front of a reflector disc, the unmodified LNB receiving the 10 GHz downlink through the centre. STL files, reflector drawing and tuning procedure are in the package; the procedure is in the build instructions. The assembled and tuned version is the IceConeFeed v2.1.

Thanks to Michał for the photos. Running one of our feeds? Show us your setup.