Sorry, forgot to add the antenna was on the top of the vehicle with no obstructions.
I don't have any equipment (yet) for testing an antenna other than the radios.
I did expect though to gain at least some range using just 1 larger antenna on one radio, which didn't happen.
It is possible though like you say that I got a bad antenna or it's just not a very good antenna to start with.
From what I could tell, the stationary radio was only able to hear the roaming radio once it was in range for that stationary radio to actually transmit.
But my understanding was, which could be wrong, the larger antenna should be able to transmit farther and the radio with the shorter antenna would pick that up father and just not be able to respond, but that might not be correct.