The SCR-784 was a radar set used by the U.S. Army. It was a mobile version of the SCR-584, used to control the fire of anti-aircraft batteries, and mounted on a searchlight trailer called a K-84. The set was used to guide the flare plane over the target.

Frequency: 2,800 MHz
Pulse Width: 0.8 μs
Pulse Repetition Rate: 1707 pps
Vertical Coverage: 300 to 10,000 yards (270 to 9,140 m)
Indicator Type: display 7 inch PPI and, two 3 inch CRT's for range determination

There are no known surviving examples of this array.