I'm setting up a mobile HF station in my Toyota Tundra consisting of an iCom 7100, Ameritron ALS-500M (controlled with a ARI-500), and a Scorpion SA-680 Antenna. The radio and amp will be mounted inside a bed mounted tool box. All coax connections currently have at least one snap on ferrite bead on them, with the amplifier output having a larger one and three wraps of coax going through it. There is also a DX Engineering Current Choke and the near the antenna connection that exits the box. At present the radio and amp are mounted in the box, and the box is on a bench in the garage, and I'm feeding the box with two Astron 70A power supplies run in parallel, and transmitting into a 1KW dummy load. I'm currently testing the system to make sure that the wiring is right and to make sure I have eliminated all (or as much as I can) the RFI. The issue I'm having is that when I transmit with the amp off everything works correctly, and the meter is showing the amount of power output that an unmodified 7100 should see at the dummy load. However, when I turn on the amp and transit I can hear my voice coming out of the amplifier. so my question is: Should I be hearing my voice coming from the amplifier? and if not, what should I do to fix it?