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Desktop Shortwave receiver
Desktop Shortwave Transceiver
Marine Shortwave receiver IMR54

General

HAM bands ? 160m  80m  40m  30m (WARC)  20m  17m (WARC)  15m  12m (WARC)  10m  ?
Freq. stability Less than 50hz/hr drift after warm up under constant supply and temperature conditions. ? ?
Tuning steps ? ? ?

Receiver

RX-range 0.5-30 MHz 0.15-30 MHz 15 kHz - 31 MHz in 10 bands
Modulations AM   CW   AM   CW   USB   LSB   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 Quadruple conversion superheterodyne Double conversion superheterodyne
IF-freqs. 40 kHz
2.5 kHz
1st: 44.93 MHz
2nd: 8.83 MHz
3rd: 455 kHz
4th: 100 kHz
?
Image rejection ? ? ?
Audio output ? ? 1 W

Transmitter

TX-range - 10-160m + WARC -
Modulations - AM   CW   USB   LSB   -
RF-output ? 100 W (?) ?

Connections

Antenna Burndept SO-239 -
Impedance 75Ω 50 Ω 72Ω
Other - - -

Electrical

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

Physical

Manufactured Between 1957 and 19xx in Great Britain Between 1982 and 198x Between 1952 and 195x in Great Britain
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 Amateur / Ham radio operators Marine / Navy
Features ? Auto-AT option Automatic volume control
Accessories ? ? ?
MPN RACAL-RA-000017L KENWOOD-TS-000930V EDDYSTONE-000700