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Desktop Shortwave receiver
Marine Shortwave receiver IMR54
Desktop Shortwave receiver

General

HAM bands ? ? 80m  40m  20m  15m  6m  10m 
Freq. stability Less than 50hz/hr drift after warm up under constant supply and temperature conditions. ? ?
Tuning steps ? ? Continuous

Receiver

RX-range 0.5-30 MHz 15 kHz - 31 MHz in 10 bands 10-80 m with 2 m / 6 m converter options
Modulations AM   CW   AM   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)
?
Selectivity 13 khz @-6db
6.5 khz @-6db
3 khz @-6db
1.2 khz @-6db
300 hz @-6db
100 hz @-6db
Wide, Intermediate, Narrow and Very narrow settings.
500 Hz ... 25 kHz
?
Filters 13 / 6.5 / 3 / 1.2 / 0.3 / 0.1 kHz ? ?
Receiver system Double/triple conversion, 23 tubes Double conversion superheterodyne ?
IF-freqs. 40 kHz
2.5 kHz
? ?
Image rejection ? ? ?
Audio output ? 1 W ?

Transmitter

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

Connections

Antenna Burndept - -
Impedance 75Ω 72Ω ?
Other - - -

Electrical

Power req. Mains Mains (110-250 V AC) Mains
Current RX ? 82 W ?
TX - - -

Physical

Manufactured Between 1957 and 19xx in Great Britain Between 1952 and 195x in Great Britain Between 1959 and 19xx in USA
Dimensions 480 × 265 × 510 mm
(18.90 × 10.43 × 20.08 in)
747 × 385 × 451 mm
(29.41 × 15.16 × 17.76 in)
?
Weight 30.50 kg (67.3 lbs) 60.90 kg (134.4 lbs) ?
Form factor Base Station Base Station Base Station

Other features

Memories ? ? ?
Usage Military communication Marine / Navy Amateur / Ham radio operators
Features ? Automatic volume control ?
Accessories ? ? ?
MPN RACAL-RA-000017L EDDYSTONE-000700 HALLICRAFTERS-SX-000101 MK IIIA