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The receiver is a general purpose receiver for use in both fixed and mobile applications. the receiver provides reception of continuous wave (CW) , modulated-continuous wave (MCW), amplitude modulated (AM) frequency shift keyed (FSK) and single sideband (SSB) signals.

Technical Details

Frequency Range
0.5 to 32 mHz
Type of Signals Received
CS, MCS, Voice, SSB, FSK
Type of Tuning
Continuous; frequency read directly on counter type indicator.
Method of Calibration
Built in Crystal-controlled
Calibration Points
Every 100 kHz
Power Source
115 or 230 Volts AC +-10%
Power Output
250 Watts Total; 140 watts with OVENS switch turned to OFF


Additional Files

Adobe PDF icon.png TM 11-856A 1956

Radio Receiver R-390A/URR Dept. of the Army Jan.20, 1956

Adobe PDF icon.png TM 11-5820-358-10

Operator’s Manual
Radio Receiver R-390A/URR

Adobe PDF icon.png TM 11-5820-358-20

Organizational Maintenance Manual
Radio Receiver R-390A/URR
10 February 1961

Adobe PDF icon.png The 21st Century R-390A/URR Technical Reference

A Collection of wisdom for enthusiasts
Radio Receiver R-390A/URR
29 May 2000