power amplifier class C

hi all,
i am working on designing a class C power amplifier for small range and small output power (3 watt) and i am using Fm car modulator as the input source to the power amplifier the problem for me is how to transmit the output signal of the car modulator to the power amplifier ?? and my only method to check that my design is working is to test the range of the output signal if the range extended then it is working so i only need to know how to transmit the car modulator signal to the power amplifier i already tried wires and coaxial cables but it seem that nothing is working and to use an antenna (i am not very familiar of how to change the design to receive with antenna) ......any help would be appreciated i am stuck in this problem and thanks in advance .

1. What transistor#? got schematic? Measure DC V everywhere.

i am using BFQ162 it is the only one available in my country