Hammarlund SP-600

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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.

Type

Desktop Amateur HF/VHF Receiver 

Frequency range RX

0.54-54 MHz 

TX

- 

Frequency stability

- 

Tuning steps

- 

Filters

- 

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) 

Modulations

- 

RF-output

- 

Antenna

SO-239 + Clamps/screws 

Impedance

100Ω 

Power requirements

Mains (95-260 V AC) 

Current drain RX

- 

TX

- 

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 

Memories

- 

Usage

Amateur / Ham radio operators 

Manufacturer

Hammarlund 

Model

SP-600

Features

 

 

None available  

 

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