Figure 1. Typical AN/VIC-1(V) without FM radio.
f. See Figure 2. The AM-1780/VRC amplifies and controls the audio signal(s), and controls
the DC power to the crew member control boxes C-2298. The commander's control box C-2298 is
cabled to jack J504 on the AM-1780, and the crew member control boxes can be connected to jacks
J505, J506, and J507 at