R-390~URR

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

Selectivity

16, 8, 4, 2 Khz with LC filters, 1 and 0.1 Khz with crystal filters

First IF

variable 9 - 18 Mhz, only from 0.5 to 8Mhz

Second IF

Variable 2 -3 Mhz on all bands

Third IF

fixed 455 Khz

Sensitivity

better than 1μV inCW/SSB, better than 3μV inb AM

Power output local

500 mw 600ohm

Power output audio line

10 mw 600ohm

Power Source

115 or 230 Volts +-10% 50-60 Hz, 270 Watts Total; 170 watts with OVENS switch turned to OFF

Dimension and weight

L 48.3 cm(19"), H 26.6 cm(10.5"), P 43.8 cm (17.25"), 29.5 Kgr

Reference File

• 11-856 Radio Receiver R-390~URR. Dept. of the Army and the Air Force. Jan. 1955. 134 p. U408.3.A13 TM 11-856 Jan. 1955

TM 11-856 1955

• TM 11-5820-357-10/-20/-35

See Also

• R-390A~URR