Collins R-389/URR

Desktop ULF/VLF Receiver

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The #link error# 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.

Frequency range

RX-range
15-500 / 500-1500 kHz (2 ranges, 7 bands)
TX-range
-
HAM bands
?
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
Proprietary
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
37.20 kg (82.1 lbs) including power supply PP-621/URR
Form factor
Base Station
Manufactured
Between 1951 and 19xx in USA
MPN
COLLINS-R-000389/URR

Other features

Memories
?
Usage
Amateur / Ham radio operators
Features + options
Operating altitude up to 10,000 feet
Accessories
?

Reviews & stories

Collins R-389/URR

Collins R-389/URR, Desktop ULF/VLF Receiver

I have owned this receiver for about 10 months. Upon receiving it I shipped it to Miltronix, Toledo, OH for a complete overhaul. I am a NDB dxer so this receiver is geared at VLF reception. I find that compared to my solid state rigs, this receiver has them beat 9 times out of 10. It is quieter than the solid state radios and the selectivity and sensitivity are outstanding. I am well aware of how rare they are but if you hunt for one they are out there, this one was about 3 miles from my residence in South Jersey, USA. I stumbled across it on Craig's list the day after Thanksgiving last year. I had been searching and searching. A suggestion, when you search for something like this, search for things like "old radio" or "heavy radio" "military radio". This wasn't even listed on the sale ad, The seller had a picture of the "old stuff" and this receiver was located in the background. UNBELIEVEABLE! I caught this one just before it went to the recycle yard.
Would you believe this receiver has a motor drive for tuning. It is geared so low it would take forever to tune from the bottom of band 1 to the top of band 2.

Written by w2rkj on Sep 24, 2015

Overall
 
Performance
Build quality
Features
User friendlyness
Value for money
Aquired
Fair condition in 2014
USD 500.00

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