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Desktop Shortwave Transceiver
Desktop Transceiver
Marine Shortwave receiver IMR54

General

HAM bands 80m  40m  20m  15m  10m  11m (CB)  ?
Freq. stability ? ? ?
Tuning steps Continuous Channelized ?

Receiver

RX-range 10-80m 26.965-27.405 MHz 15 kHz - 31 MHz in 10 bands
Modulations CW   USB   LSB   AM   SSB   AM   CW  
Sensitivity 0.5 µV @ 10 dB S+S/N ? 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 2.1 kHz @ 6 dB (1.8:1 shape factor) ? Wide, Intermediate, Narrow and Very narrow settings.
500 Hz ... 25 kHz
Filters 9MHz crystal ? ?
Receiver system Superheterodyne ? Double conversion superheterodyne
IF-freqs. ? ? ?
Image rejection ? ? ?
Audio output External speaker required ? 1 W

Transmitter

TX-range 10-80m 26.965-27.405 MHz -
Modulations CW   USB   LSB   AM   SSB   -
RF-output SSB: 550 W PEP, CW: 360 W ? W ?

Connections

Antenna SO-239 - -
Impedance 50Ω ? 72Ω
Other - - -

Electrical

Power req. Mains via CS550 Power Supplier / Speaker unit ? Mains (110-250 V AC)
Current RX ? ? 82 W
TX ? ? -

Physical

Manufactured Between 1969 and 19xx in USA Between 19xx and 19xx Between 1952 and 195x in Great Britain
Dimensions 152 × 280 × 330 mm
(5.98 × 11.02 × 12.99 in)
? 747 × 385 × 451 mm
(29.41 × 15.16 × 17.76 in)
Weight 7.70 kg (17.0 lbs) ? 60.90 kg (134.4 lbs)
Form factor Base Station Base Station Base Station

Other features

Memories None 40 channels in bank(s) ?
Usage Amateur / Ham radio operators Citizen Band (27Mc) Marine / Navy
Features ? ? Automatic volume control
Accessories ? ? ?
MPN GALAXY-GT000550 SOMMERKAMP-TS-000740-SSB EDDYSTONE-000700