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Marine Shortwave receiver IMR54
Marine Shortwave receiver
Desktop Shortwave receiver

General

HAM bands ? ? ?
Freq. stability ? ? Below 10 MHz: 50 Hz/MHz Above 10 MHz: 20 Hz/MHz Both after 30 minutes warm-up
Tuning steps ? ? ?

Receiver

RX-range 15 kHz - 31 MHz in 10 bands 130-3750 kHz in 3 bands 0.48-30 MHz in 5 bands
Modulations AM   CW   AM   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)
? AM: 5 µV
CM 1-2 µV
Selectivity Wide, Intermediate, Narrow and Very narrow settings.
500 Hz ... 25 kHz
? 1.5 / 3.0 / 6.0 / 12.0 kHz selectable (-6 dB)
Filters ? ? 500 Hz switchable crystal filter
Receiver system Double conversion superheterodyne Superheterodyne Superheterodyne
IF-freqs. ? 127 kHz 450 kHz
Image rejection ? ? ?
Audio output 1 W 1 W 1 W

Transmitter

TX-range - - -
Modulations - - -
RF-output ? ? ?

Connections

Antenna - - -
Impedance 72Ω 70Ω 70/80Ω
Other - - -

Electrical

Power req. Mains (110-250 V AC) 12 V DC, 24 V DC optional Mains (100-125 or 200-250 V AC) or external PSU
Current RX 82 W ? 80 W
TX - - -

Physical

Manufactured Between 1952 and 195x in Great Britain Between 1950 and 195x in Great Britain Between 1959 and 196x in Great Britain
Dimensions 747 × 385 × 451 mm
(29.41 × 15.16 × 17.76 in)
425 × 222 × 254 mm
(16.73 × 8.74 × 10.00 in)
?
Weight 60.90 kg (134.4 lbs) ? ?
Form factor Base Station Mobile Base Station

Other features

Memories ? ? ?
Usage Marine / Navy Marine / Navy Military communication
Features Automatic volume control ? ?
Accessories ? ? ?
MPN EDDYSTONE-000700 EDDYSTONE-000720 EDDYSTONE-000730/6