Waterproof 5.8dBi Meshtastic LoRa 915mhz Omnidirectional Fiberglass Antenna with 20ft Low Loss Cable, Suitable for Heltec V3 V4 Meshtastic LoRa32 RAK Module Board & Sensecap Solar Node

What he said. Check the connectors. I bought one that was going to require opening the RTK and changing the connection leg to match the antenna - you may have another part in your package that has a pigtail connection. I sent that one back and got this one instead based on someone else’s homework and have been happy with it. Has the right connector and improved accuracy over the stock antenna. Got a couple .007 .008 location precision readings. https://www.amazon.com/dp/B0F9WMTMD4?ref=ppx_yo2ov_dt_b_fed_asin_title