Originally Posted by AmiableDave

Sounds like a ground problem. Did you install a chassis ground on the VHF? This is not the +/- power wires.... What did Standard Horizon say??

Originally Posted by zfrilly

I am an FCC licensed general radio operator. Used to work for Motorola. I have installed tons of coax connectors, and messed up a few. All it takes is one strand out of place. Make sure the foil is also not touching the inner pin. The ground plane should not cause this issue, just poor transmit and receive quality if not large enough. You could by a cheap watt meter and check your