hammarl-mf: Hammarlund SP-600 - Variants
ID: 379495
This article refers to the model: Super-Pro 600 SP-600 (generic model) (Hammarlund Mfg. Co. Inc.; New York, NY)
hammarl-mf: Hammarlund SP-600 - Variants
29.May.15 23:36
70
The SP-600 has been produced in very many variants over the years. An eccellent review of all types is found in the book "Shortwave Receivers Past & Present" by Fred Osterman, the original version of Les Locklear's listing under www hammarlund.info.
The typeplate is usually found on the cover of the r.f. unit:
- J will say that all components meet the JAN (Joint Army Navy) Standard requirements
- an X means that the receiver is equipped with an oscillator for crystal controlled fixed frequency operation, and
- a L, that the set covers not the mediumwave band but the longwaves, used in the United States for aeronautical beacons (NDB).
| SP-600-JX-1 | Frequency range 540 kHz - 54 MHz, Army designation R-274A/FRR, Contract 1689-Phila-51-01 Part of sets AN/MRR-4; GRC-38A & B |
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| SP-600-JLX-2 | Frequency range 100-400 kHz & 1,35-29,7 MHz | |
| SP-600-J-3 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation |
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| SP-600-J-4 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, separate i.f. amplification control Army designation R-320A/FRC, contract 19474-Phila-50-06 part of set OA-58B/FRC |
type C |
| SP-600-J-5 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, powered AC 25 - 60 Hz Army designation R-483/FRR, contract 21478-Phila-50 |
|
| SP-600-JX-6 | Frequency range 540 kHz - 54 MHz, BFO-Bereich +/- 10 kHz Navy designation R-274B/FRR Part of sets AN/MRR-4; GRC-38A & B |
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| SP-600-JX-7 | Frequency range 540 kHz - 54 MHz | |
| SP-600-JX-8 | Frequency range 540 kHz - 54 MHz, produced for Welch Contract XG-479 |
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| SP-600-JL-9 | Frequency range 100-400 kHz & 1,35-29,7 MHz no crystal controlled fixed frequency operation |
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| SP-600-JX-10 | Frequency range 540 kHz - 54 MHz Successor of the SP-600-JX-7 |
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| SP-600-J-11 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, Successor of the SP-600-J-3 |
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| SP-600-JX-12 | Frequency range 540 kHz - 54 MHz, Signal Corps designation R-274A/FRR, contract 3376-Phila-52 Successor of the SP-600-JX-1 |
type B |
| SP-600-J-13 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, powered AC 25 - 60 Hz, contract 16838-Phila-51, Successor of the SP-600-J-5 |
|
| SP-600-JX-14 | Frequency range 540 kHz - 54 MHz Signal Corps Bezeichnung R-274C/FRR (R-542/FRR), contract 3376-Phila-52 Successor of the SP-600-JX-10 |
type B |
| SP-600-JLX-15 | Frequency range 100-400 kHz & 1,35-29,7 MHz Successor of the SP-600-JLX-2 |
|
| SP-600-JL-16 | Frequency range 100-400 kHz & 1,35-29,7 MHz no crystal controlled fixed frequency operation Successor of the SP-600-JL-9 |
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| SP-600-JX-17 | Frequency range 540 kHz - 54 MHz Diversity receiver, can be identified by the two red metal knobs, produziert for the Air Material Command |
type D |
| SP-600-JX-18 | Frequency range 540 kHz - 54 MHz Produced for GAUVREAU contract. Successor of the SP-600-JX-10 |
|
| SP-600-J-19 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, powered AC 25 - 60 Hz Successor of the SP-600-J-13 |
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| SP-600-J-20 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, powered AC 25 - 60 Hz, 90 - 270 V Signal Corps designation R-483A/FRR, contract 3479-Phila-52-05 Successor of the SP-600-J-19 |
type A |
| SP-600-JX-21 | Frequency range 540 kHz - 54 MHz Successor of the SP-600-JX-10 & SP-600-JX-14 |
|
| SP-600-J-22 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, Successor of the SP-600-J-11 |
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| SP-600-JLX-23 | Frequency range 100-400 kHz & 1,35-29,7 MHz Successor of the SP-600-JLX-15 |
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| SP-600-JL-24 | Frequency range 100-400 kHz & 1,35-29,7 MHz no crystal controlled fixed frequency operation Successor of the SP-600-JL-16 |
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| SP-600-J-25 | Frequency range 540 kHz - 54 MHz, no crystal controlled fixed frequency operation, powered AC 25 - 60 Hz Successor of the SP-600-J-19 |
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| SP-600-JX-26 | Frequency range 540 kHz - 54 MHz Signal Corps Bezeichnung R-274C/FRR, contract 3376-Phila-52 Successor of the SP-600-JX-14 & SP-600-JX-21 |
|
| SP-600-JLX-27 | Frequency range 200-400 kHz & 540 kHz - 29,7 MHz | |
| SP-600-JX-28 | Frequency range 540 kHz - 54 MHz Signal Corps designation R-620/FRR, contract 25693-Phila-53-61 |
|
| SP-600-JX-29 | Frequency range 540 kHz - 54 MHz produced for CIA, Contract No. XG-1178 |
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| SP-600-JX-30 | Frequency range 540 kHz - 54 MHz Diversity Empfänger, can be recognized by the two red metal knobs, Successor of the SP-600-JX-17 |
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| SP-600-VLF-31 | VLF frequencies 10 - 540 kHz 4 crystal controlled fixed frequencies |
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| SP-600-JX-32 | Frequency range 540 kHz - 54 MHz black frontpanel with engraved lettering produced for Mackay Radio, technically identical to the SP-600-JX-21 |
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| SP-600-JLX-33 | Frequency range 100-400 kHz & 1,35 - 29,7 MHz | |
| SP-600-JL-34 | Frequency range 100 - 200 kHz, 540 KHz - 14,8 MHz for CIA, Contract No. XG-1765 |
|
| SP-600-JX-35 | Frequency range 540 kHz - 54 MHz BFO-Bereich +/- 10 kHz Signal Corps designation R-274B/FRR |
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| SP-600-JX-36 | Frequency range 540 kHz - 54 MHz technically identical to the SP-600-JX-21, additional audio input at the rear produced for the FBI under contract No. FBI-16876 |
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| SP-600-JL-24 "Special" | Frequency range 100 - 200 kHz, 1,35 - 29,7 MHz US Navy designation R-274B/FRR |
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| SP-600-JX-37 | Frequency range 540 kHz - 54 MHz powered AC 25 - 60 Hz Successor of the SP-600-JX-21 |
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| SP-600-VLF-38 | VLF frequencies 10 - 540 kHz 4 crystal controlled fixed frequencies powered AC 25 - 60 Hz |
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| SP-600-JX-39 | Frequency range 540 kHz - 54 MHz produced for FAA Contract FA-2338 |
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| SP-600-JX-21A | Frequency range 540 kHz - 54 MHz Latest variant of the SP-600 with product detector (LSB/USB/CW MOD switch) Frontpanel with engraved lettering and designation JX-21A |
Please take care of adding your images to the correct model, thank you
Martin Boesch
To thank the Author because you find the post helpful or well done.
Hammarlund SP-600 - Variants
30.May.15 20:42
70 from 3512
Here find the four main types of front panel design, this might be helpful to distinguish between different variants, if you only have access to images and cannot open the set to check the typeplate inside in the receiver:
| Type A (R-483/FRR) | Type B (R-274A/FRR and R-274C/FRR) |
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| No fixed frequency control in right upper corner | Controls to select fixed frequencies in right upper corner |
| Type C (R-320A/FRR) | Type D (SP-600-JX-17) |
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| IF gain control in right upper corner, no fixed frequencies | The model designed for Air Material Command comes with red knobs and is prepared for diversity operation |
To thank the Author because you find the post helpful or well done.