I broke one my antennas as I try to move it and didn't realize that the black housing had slid up far enough that it caused the antenna board inside to snap off when I tried to move it. It snapped at the metal L connector. It was foolish probably to do as I have severe nerve damage in my left hand and muscle atrophy but I I try not to let such things get in my way to do things.
I searched and saw antennas that I could purchase but all of them look like they haven't received real certification as to their quality and or usage. I submitted a warranty ticket and a message to support in hopes that they will replace it.
I know for a close replacement it should be approximately 1 to 2 DBI else I understand it starts being a little bit more directional than omnidirectional. It's Dual frequency according to the picture I found telling the specs of it.
I don't suppose anyone who has upgraded their antennas may have one for the c8 they might be willing to part with? I'm still waiting for a response from warranty. I'm hoping they will replace it but we shall see. Meanwhile one of my antennas is down.
Mike