Heavy-duty shortwave radio receiver housed in a metal rack-mount cabinet with dual chrome carrying handles. The grey-painted faceplate features numerous control knobs and dials, two analog meters, and black-and-white labelling for operational adjustments. Central tuning display shows numeric kilocycle frequency. Marked plate at the center reads:
“Receiver, Radio R-390A/URR — Electronic Assistance Corporation” with power specifications of 115/230 V AC, 48–62 Hz.
Features include:
-Adjustable line and RF gain controls
-Selectable bandwidth (1–16 kHz)
-Audio response switch (sharp/wide)
-Limiter, AGC (automatic gain control), and BFO controls
-Headphone jack and terminal outputs for line level connection
-Serial number engraved on main identification plate