To mount a bigger antenna at a 90 degrees angle to the OrangeRX OpenRLS transmitter module (JR 1W type), I created this custom cover. The u.FL coax pigtail with the SMA connector is fastened in the right position for mounting a SRH-771 (or similar 433 MHz antenna). The inside of the antenna mount has the hexagonal nut shape cut out for this purpose. Note: The picture shows holes for the pin headers but I left them out in the final design as the pins are sitting too deep to be useful. Note 2: You need to reverse the handlebar on your radio for the antenna to fit. It's an easy mod, just unscrew the 2 nuts on the inside.Note: You need to reverse the handlebar on your radio for the antenna to fit. It's an easy mod, just unscrew the 2 nuts on the inside.