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Hammarlund SP-600

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Desktop HF/VHF Receiver

As many as 40 (!) different SP-600 versions have been manufactured. It started with the SP-600 JX-1 in 1951. Most versions have a frequency range as stated above, but there were some exceptions. For instance the SP-600 VLF only covers 10-540 kHz and the SP-600-JLX-2 (1951) covers 100-400 kHz and 1.35-29.7 MHz. The last SP-600 was the SP-600 JX-21A which was in production until 1972. This was also the only SP-600 with a SSB product detector.

From the outside, most versions look quite similar, but circuit modifications where made throughout its lifetime. Many models were custom ordered for military or naval duties. It is not believed that the SP-600 was used on board ships, only on shore stations.

For reference, here is a list of all the versions I could find: SP-600-JX-1, SP-600-JLX-2, SP-600-J-3, SP-600-J-4, SP-600-JX-6, SP-600-JX-7, SP-600-JX-8, SP-600-JL-9, SP-600-JX-10, SP-600-J-11, SP-600-JX-12, SP-600-J-13, SP-600-JX-14, SP-600-JLX-15, SP-600-JL-16, SP-600-JX-17, SP-600 JX-18, SP-600-J-19, SP-600-J-20, SP-600-JX-21, SP-600-J-22, SP-600-JLX-23, SP-60O-JL-24, SP-600-J-25, SP-600-JX-26, SP-600-JLX-27, SP-600-JX-28, SP-600-JX-29, SP-600-JX-30, SP-600-VLF-31, SP-600-JX-32, SP-600-JLX-33, SP-600-JL-34, SP-600-JX-35, SP-600-JX-36, SP-600-JL-24, SP-600-JX-37, SP-600-VLF-38, SP-600-JX-39 and SP-600-JX-21A.

The SP-600 requires an external loadspeaker.

Specifications
Type
Desktop Amateur HF/VHF Receiver 
Frequency range RX
0.54-54 MHz 
TX
Frequency stability
Tuning steps
Filters
Receiver
Modulations
AM / CW 
Sensitivity
2.3 µV (S/N ratio 10:1) 
Selectivity
Receiver system
Single conversion below 7.4 MHz, dual conversion above 7.4 MHz 
IF-frequencies
1st: 3.955 MHz
2nd: 455 kHz 
Image rejection
Audio output
2.5 W (external speaker required) 
Transmitter
Modulations
RF-output
Connections
Antenna
SO-239 + Klemmen / schroeven 
Impedance
100Ω 
Electrical
Power requirements
Mains (95-260 V AC) 
Current drain RX
TX
Physical
Dimensions (w×h×d)
480 × 270 × 420 mm (18.90 × 10.63 × 16.54 in)  
Weight
29.5 kg (65.1 lbs)  
Form factor
Desktop 
Manufactured
Between 1951 and 1972 in USA 
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
Hammarlund 
Model
SP-600
Features
 
Manuals, Diagrams and Brochures
 
None available  
 
 
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