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![]() Hughes 1938 article, cover page Click on image for larger view. |
![]() Hughes 1938 article, page 2 Click on image for larger view. |
![]() Hughes 1938 article, page 3 Click on image for larger view. |
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![]() NM-40A dial closeup Before the advent of digital tuning, either a large analog dial or a multiple-band selector switch was required for careful tuning. As a solution to accomodate the very narrow bandwidth window of the NM-40A, Stoddart built this gear-connected, spiral dial that allowed an incredible tuning width of 30 linear inches for its frequency range of 20 Hz to 15.5 kHz. |
![]() c.1955 Stoddart demonstration van |
![]() c.1968 RFI lab Stoddart Electro Systems Gardena, California |
![]() c.1959 RFI lab National Scientific Laboratories, Inc. Washington, DC |
Years Sold | Model No. | Military Equiv. | Freq. Range | Price*
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1944 - | NM-3 & 3A | OCV | 100 MHz - 400 MHz | .
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1947 - 1954 | NM-5 & 5A | TS-587/U | 15 MHz - 400 MHz | .
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1949 - 1962+ | NM-10 & 10A | AN/URM-6 | 14 kHz - 250 kHz | .
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1950 - 1951+ | NM-20A & 20B | AN/PRM-1A | 150 kHz - 25 MHz | .
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1954 - 1966+ | NM-30A | AN/URM-47 | 20 MHz - 400 MHz | $3250 (1966)
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1950 - 1966+ | NM-50A & 52A | AN/URM-17 | 375 MHz - 1 GHz | $3250 (1966)
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1956 - 1966+ | NM-40A** | AN/URM-41 | 30 Hz - 15 kHz | $3585 (1961)
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1960 - | 289-1*** | . | 14 kHz - 150 kHz | .
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1962 - | NM-60A | AN/URM-42 | 1 GHz - 10.7 GHz | .
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1962 - 1966+ | NM-22A | AN/URM-131 | 150 kHz - 32 MHz | $3250 (1966)
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c.1962 - 1966+ | NM-62A & 62B | AN/URM-138 | 1 GHz - 10 GHz | .
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1966 - 1974+ | NM-12T | . | 10 kHz - 168 kHz | $5670 (1974)
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1972 - | 533R-1 | . | 1 MHz - 10 MHz | .
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1972 - | 533R-2 | . | 10 MHz - 100 MHz | .
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1972 - | 533R-3 | . | 100 MHz - 1 GHz | .
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1966 - 1974+ | NM-25T | . | 150 kHz - 32 MHz | $6490 (1974)
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1974 - 1979+ | NM-26T | . | 150 kHz - 32 MHz | $10,450 (1979)
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c.1974 - 1979+ | NM-65T | . | 1 GHz - 10 GHz | $18,450 (1979)
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1973 - 1979+ | NM-17/27 | . | 10 kHz - 32 MHz | $14,470 (1979)
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1973 - 1979+ | NM-37/57 | . | 30 MHz - 1 GHz | $17,230 (1979)
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c. 1976 - 1979+ | NM-7 & 7A | . | 20 Hz - 50 kHz | $9560 (1979)
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1977 - 1980+ | NM-67 | . | 1 GHz - 18 GHz | $44,000 (1979)
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2003+ | NM-67B | . | 1 GHz - 18 GHz | .
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2003+ | NM-7/60A | . | 20 Hz - 3 GHz | $65,000 (2003)
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2006+ | CER2018 | . | 20 Hz - 18 GHz | .
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* retail price of receivers at indicated dates without antennas or other accessories.
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** Stoddart NM40A, its AC power supply, and accessories, including a 30-inch loop antenna, remote meter, chart recorder, headphones, and a dipole antenna with its own external, two-tube, high-Z preamp. |
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***VLF spy radio, Model 289-1Another innovative receiver by Stoddart with the following features: pocket-sized (4 x 3-1/4 x 1-inch), 12-transistor, superheterodyne circuit with 2 RF and 3 IF stages, BFO, five crystal-tuned frequencies (14.8, 16.0, 18.6, 19.8, and 22.3 kHz) a Collins 500 Hz mechanical filter, a miniature ferrite loop antenna and an optional long-wire antenna coupler. loop antenna: left receiver: center antenna coupler: right |
H. A. Favors, R. E. Bloom, & R. J. Fleischer, "Interference and the RFI Meter," INSTRUMENTS & CONTROL SYSTEMS, August 1961, pp. 1443-1449.
B. G., "Amateurs Aid Hughes on World Flight," QST, October 1938, pp. 19-20.
F. Haber & R. M. Showers, "Instrumentation for Radio Interference Measurements," ELECTRONIC INDUSTRIES, March 1961, pp. 110-116+.
Dan Hoolihan, "The Richard R. Stoddart Award: The History Behind the Award," IEEE EMC SOCIETY NEWSLETTER, No. 201, Spring 2004, pp. 30-32.
"Richard R. Stoddart Deceased," IEEE ELECTROMAGNETIC COMPATIBILITY GROUP NEWSLETTER, No. 76, January 1973
Stoddart Aircraft Radio Company, INSTRUCTION BOOK FOR NOISE AND FIELD INTENSITY METER EQUIPMENT, NAVY MODEL OCV, NAVSHIPS 900,203, USN: Bureau of Ships, 1946.
Stoddart Aircraft Radio Company, INSTRUCTION BOOK FOR NOISE-FIELD INTENSITY METER TS-587/U & TS-587A/U, NAVSHIPS 900,990, USN: Bureau of Ships, 1947.
Stoddart Aircraft Radio Company, TECHNICAL MANUAL FOR RADIO-INTERFERENCE MEASURING SET AN/URM-41, NAVSHIPS 92739, USN: Bureau of Ships, 1956.
Stoddart Electro Systems, RADIO-INTERFERENCE FIELD-INTENSITY INSTRUMENTATION [A Catalog], 1961.
R. P. Turner, "Amateur Radio and the Hughes Flight," RADIO, October 1938, pp. 10-13+.
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1941 - c.1960
Stoddart Aircraft Radio Co. 6644 Santa Monica Blvd. Hollywood 38, California |
c.1960 - c.1972
Stoddart Electro Systems (Div. of Tamar Electronics Industries, Inc.) 2045 W. Rosecrans Ave. Gardena, CA 90249 |
c.1972 - 1978
Singer Instrumentation 5340 Alla Road Los Angeles, CA 90066 |
1978 - 1991
Ailtech (Div. of Cutler-Hammer/Eaton) 5340 Alla Road Los Angeles, CA 90066 |
1991 - 2004
Carnel Labs Corp. Div. of ARnellab 21434 Osborne Street Canoga Park, CA 91304 |
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