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Collins R-389/URR

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Desktop ULF/VLF Receiver

The is a high performance general purpose military receiver for voice, CW and FSK-signals in the 15 to 1500 kilocycle (kHz) frequency range. It was designed for high stability under varying conditions of temperature, humidity, shock and vibration and may be employed in either fixed or mobile installations.

Specifications
Type
Desktop Amateur ULF/VLF Receiver 
Frequency range RX
15-500 / 500-1500 kHz (2 ranges, 7 bands) 
TX
Frequency stability
Tuning steps
Filters
0.1 / 1 / 2 / 4 / 8 kHz 
Receiver
Modulations
AM / CW / FSK 
Sensitivity
6 µV 
Selectivity
Receiver system
Double conversion cuperheterodyne, including circuit arragement for cancelling drift of crystal oscillator (34 tubes) 
IF-frequencies
Image rejection
Audio output
500 mW unbalanced, 10 mW balanced 
Transmitter
Modulations
RF-output
Connections
Antenna
Merkgebonden 
Impedance
125Ω 
Electrical
Power requirements
Mains (115/230 V AC) 
Current drain RX
250 W with oven on, 150 W when oven off 
TX
Physical
Dimensions (w×h×d)
483 × 267 × 438 mm (19.02 × 10.51 × 17.24 in)  
Weight
37.2 kg (82.1 lbs) including power supply PP-621/URR 
Form factor
Desktop 
Manufactured
Between 1951 and 19xx in USA 
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
Collins 
Model
R-389/URR
Features
Operating altitude up to 10,000 feet 
Manuals, Diagrams and Brochures
 
None available  
 
 
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