The TCM-2 is in the center. It is a World War II Navy transmitter, 2-18 MHz, CW, MCW and AM. Its conservative ratings are 125 watts on CW, 30 watts on MCW and 30 watts on AM. It actually easily puts out twice that. In the final are two 803 tubes which are suppressor grid modulated for MCW and AM. The power supply is on the left. The receivers on the right are the Navy RBB (0.5-4.0 MHz) and RBC (4-27 MHz).