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Desktop Shortwave receiver
Marine Shortwave receiver IMR54
Enhanced Conventional Portable Radio

General

HAM bands None  ? 2m  70cm 
Freq. stability ? ? ±1.5ppm
Tuning steps Continuous ? 12.5KHz/ 25KHz

Receiver

RX-range 150-4500 kHz in 4 bands
88-108 MHz
15 kHz - 31 MHz in 10 bands 136-174MHz / 350-390MHz / 400-480MHz / 450-520MHz
Modulations AM   FM   CW   AM   CW   -
Sensitivity ? 15-160 kHz: 4-20 µV (10 dB S/N)
160-1500 kHz: 6-10 µV (10 dB S/N)
1.5-4 MHz: 1.5-3 µV (10 dB S/N)
4-10 MHz: 2-6 µV (10 dB S/N)
10-31 MHz: 2-10 µV (10 dB S/N)
5% BER: 0.25 µV
Selectivity ? Wide, Intermediate, Narrow and Very narrow settings.
500 Hz ... 25 kHz
60dB
Filters ? ? ?
Receiver system ? Double conversion superheterodyne ?
IF-freqs. ? ? ?
Image rejection ? ? ?
Audio output ? 1 W ?

Transmitter

TX-range - - 136-174MHz / 350-390MHz / 400-480MHz / 450-520MHz
Modulations - - -
RF-output ? ? ?

Connections

Antenna TV-antenne - -
Impedance 50Ω 72Ω 50ΩΩ
Other - - -

Electrical

Power req. 12-32 V DC, 6×1.5 volt battery Mains (110-250 V AC) ?
Current RX ? 82 W ?
TX - - ?

Physical

Manufactured Between 197x and 197x in Denmark Between 1952 and 195x in Great Britain Between and in China
Dimensions 350 × 230 × 180 mm
(13.78 × 9.06 × 7.09 in)
747 × 385 × 451 mm
(29.41 × 15.16 × 17.76 in)
60.8 × 35.7 × 118.5 mm
(2.39 × 1.41 × 4.67 in)
Weight 9.00 kg (19.9 lbs) 60.90 kg (134.4 lbs) 239 gr (8.4 oz) including battery
Form factor Mobile Base Station Portable

Other features

Memories None ? ?
Usage Marine / Navy Marine / Navy Commercial / Land mobile communication
Features Direction Finding facility
FM broadcast band readout in small window at the bottom of round dial window
Automatic volume control Mandown
Lone Worker
Emergency Alarms
Advanced Encryption with RC4 Technology
DMO True 2-slot, Allowing for 2 Talk Paths at 1 Frequency
Transmit Interrupt/Radio Priority for Emergency or Urgent Communication
Integrated High Precision GPS
Accessories ? ? Battery
Belt Clip
Hand Strap
Stubby Antenna
Charger
MPN SAILOR-R000109 EDDYSTONE-000700 BELFONE-BF-TD000511