This is the antenna element that I put on the Tram nmo magnetic mount base. It drastically increases both receive and transmit range: https://www.amazon.com/Comet-CA-2X4SRNMO-140-160-435-465-Antenna/dp/B00HVGOAAM/ref=sr_1_1?s=electronics&ie=UTF8&qid=1495209465&sr=1-1&keywords=comet+nmo+dual