| This is an HTML version of the original government document, Recommendations for Regulation of Radio Adopted by the Third National Radio Conference, October 6-10, 1924, issued by the Government Printing Office in Washington, D.C. for the Department of Commerce [C1.2:R11/924].
This HTML version is based on a photocopy of the original 35-page publication. It incorporates the original contents (except for some minor elements, such as page number references), keeping as much as possible the layout of the original document. |
SUBCOMMITTEE NO. 1: GENERAL ALLOCATION OF FREQUENCY OR WAVE-LENGTH BANDS | |
W. D. Terrell, chairman. J. F. Dillon, secretary. Maj. L. B. Bender. C. B. Cooper. George S. Davis. Dr. J. H. Dellinger. Lloyd Espenschied. Leo Fitzpatrick. Dr. A. N. Goldsmith. A. H. Halloran. |
| Prof. L. A. Hazeltine. | J. V. L. Hogan. | Prof. A. N. Kennelly. | F. A. Kolster. | L. L. Lee. | W. G. Logue. | E. F. McDonald, jr. | Capt. Ridley McLean. | H. P. Maxim. |
SUBCOMMITTEE NO. 2: ALLOCATION OF FREQUENCY OR WAVE-LENGTH BANDS TO BROADCASTING STATIONS | |
Dr. George K. Burgess, chairman. S. W. Edwards, secretary. R. Asserson. Edgar L. Bill. H. E. Campbell. John Campbell. A. H. Dyson. W. E. Downey. Dr. A. N. Goldsmith. | | L. B. Henson. | J. V. L. Hogan. | C. W. Horn. | Lambdin Kay. | S. M. Kintner. | Jos. Knowland. | Elam Miller. | Adam Stein. | W. A. Wheeler. |
SUBCOMMITTEE NO. 3: GENERAL PROBLEMS OF RADIO BROADCASTING | |
Gen. George O. Squier, chairman. E. A. Beane, secretary. Earle C. Anthony. E. H. Armstrong. R. G. Callvert. L. M. Clausing. James Cleary. Powel Crosley, jr. A. E. Davies. C. E. Erbstein. Herbert Frost. W. E. Harkness. | | Prof. C. M. Jansky, jr. | A. Atwater Kent. | H. R. Kibler. | Paul B. Klugh. | Arthur H. Lynch. | F. H. McDonald. | E. B. Mallory. | David Sarnoff. | John Shepard, 3d. | W. A. Strong. | G. D. Wardrop. | W. A. Wheeler. |
SUBCOMMITTEE NO. 4: PROBLEMS OF MARINE COMMUNICATION | |
Wallace H. White, jr., chairman. Arthur Batcheller, first secretary. C. C. Kolster, second secretary. E. B. Calvert. C. B. Cooper. George S. Davis. Lloyd Espenschied. F. A. Kolster. | | L. L. Lee. | W. G. Logue. | Capt. Ridley McLean. | J. L Preston. | E. J. Simon. | A. J. Steelman. | T. M. Stevens. | Lieut. E. M. Webster. |
SUBCOMMITTEE NO. 5: AMATEUR PROBLEMS | |
H. P. Maxim, chairman. R. Y. Cadmus, secretary. E. H. Armstrong. Zeh Bouck. Prof. C. M. Jansky, jr. | | Dr. C. B. Jolliffe. | Jos. H. Montgomery. | P. C. Oscanyan, jr. | C. H. Stewart. | K. B. Warner. |
SUBCOMMITTEE NO. 6: INTERFERENCE PROBLEMS | |
Maj. L. B. Bender, chairman. T. G. Deiler, secretary. A. M. Caddell. W. J. Canada. Dr. J. H. Deilinger. Prof. L. A. Hazeltine. J. V. L. Hogan. | | S. M. Kinter. | F. A. Kolster. | Elam Miller. | H. C. Moore. | O. C. Roos. | W. D. Terrell. |
SUBCOMMITTEE NO. 7: INTERCONNECTION | |
Judge S. B. Davis, chairman. O. R. Redfern, secretary. L. Ainsworth. E. C. Anthony. S. E. Baldwin. James Cleary. Alfred H. Dyson. Prank W. Elliot. Geo. C. Furness. Jos. S. Gettler. | | R. B. Hale. | W. E. Harkness. | Lambdin Kay. | C. W. Horn. | D. S. Knowlton. | E. B. Mallory. | H. E. Metcalf. | David Sarnoff. | Adam Stein. | W. A. Strong. |
SUBCOMMITTEE NO. 8: COORDINATING COMMITTEE | |
Herbert Hoover, chairman. W. Van Nostrand, jr., secretary. Earl C. Anthony. E. H. Armstrong. Maj. L. B. Bender. Dr. George K. Burgess. George S. Davis. S. B. Davis. Dr. J. H. Dellinger. S. W. Edwards. W. E. Harkness. Prof. L. A. Hazeltine. J. V. L. Hogan. Prof. C. M. Jansky, jr. | | Prof. A. E. Kennelly. | Joseph Knowland. | F. A. Kolster. | Capt. Ridley McLean. | E. B. Mallory. | Hiram Percy Maxim. | Elam Miller. | John Shepard, 3d. | Gen. Geo. O. Squier. | C. H. Stewart. | W. D. Terrell. | K. B. Warner. | Wallace H. White, jr. |
Frequency or wave band allocations | ||||
Kilocycles | Meters | Service | ||
95-120 | 3,156-2,499 | Government, CW and ICW, exclusive. | ||
120-157 | 2,499-1,910 | Marine, CW and ICW, exclusive. | ||
157-165 | 1,910-1,817 |
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165-190 | 1,817-1,578 |
| ||
190-230 | 1,578-1,304 | Government, CW and ICW, exclusive. | ||
230-235 | 1,304-1,276 | University, college, and experimental, CW and ICW, exclusive. | ||
235-250 | 1,276-1,199 | Marine, phone, nonexclusive. | ||
250 | 1,199 | Government, CW, ICW, nonexclusive. | ||
250-275 | 1,199-1,090 | Marine, phone, nonexclusive. | ||
275 | 1,090 | Government, CW, ICW, nonexclusive. | ||
275-285 | 1,090-1,052 | Marine, phone, nonexclusive. | ||
285-500 | 1,052-600 | Marine and coastal, including radio compass and radio beacons. | ||
500-550 | 600-545 | Aircraft, CW, ICW, phone and fixed safety-of-life stations, phone, exclusive. | ||
550-1,500 | 545-200 | Broadcasting services, phone, exclusive. | ||
1,500-2,000 | 200-150 | Amateur, CW, ICW, phone. | ||
2,000-2,250 | 150-133 | Point-to-point, nonexclusive. | ||
2,250-2,500 | 133-120 | Aircraft, exclusive. | ||
2,500-2,750 | 120-109 | Mobile. | ||
2,750-2,850 | 109-105 | Relay broadcasting, exclusive. | ||
2,850-3,500 | 105-85.7 | Public service. | ||
3,500-4,000 | 85.7-75.0 | Amateur and Army mobile. | ||
4,000-4,500 | 75.0-66.6 | Public service and mobile. | ||
4,500-5,000 | 66.6-60.0 | Relay broadcasting, exclusive. | ||
5,000-5,500 | 60.0-54.5 | Public service. | ||
5,500-5,700 | 54.5-52.6 | Relay broadcasting, exclusive. | ||
5,700-7,000 | 52.6-42.8 | Public service. | ||
7,000-8,000 | 42.8-37.5 | Amateur and Army mobile. | ||
8,000-9,000 | 37.5-33.3 | Public service and mobile. | ||
9,000-10,000 | 33.3-30.0 | Relay broadcasting, exclusive. | ||
10,000-11,000 | 30.0-27.3 | Public service. | ||
11,000-11,400 | 27.3-26.3 | Relay broadcasting, exclusive. | ||
11,400-14,000 | 26.3-21.4 | Public service. | ||
14,000-18,000 | 21.4-18.7 | Amateur. | ||
16,000-18,000 | 18.7-16.7 | Public service and mobile. | ||
18,000-56,000 | 16.7-5.35 | Beam transmission. | ||
56,000-64,000 | 5.35-4.69 | Amateur. | ||
64,000-infinity | 4.69-0 | Beam transmission. |
Class | Kilocycles | Meters | Number of channels |
1 | 550-1,070 | (545-280) | 53 plus 10. |
2 | 1,090-1,400 | (275-214) | 32. |
3 | 1,420-1,460 | (211-205) | 5. |
120-190 kc. (2,500-1,578 meters). | Were left unassigned, except as hereinafter stated, with the recommendations that allocations to the various marine services be made by the Department of Commerce. |
160 kc. (1,874 meters) 175 kc. (1,713 meters) 185 kc. (1,621 meters) | For Governmental use. It was recommended that the wave length of 1,620 meters be used for ice-patrol broadcasting and for other navigational aid messages, but that neither of the three wave lengths should be exclusive. |
235-285 kc. (1,276-1,052 meters). | For marine radiotelephony. It was recommended that specific allocations within this band should be made by the Department of Commerce and pending further developments should be tentative only. |
343 kc. (875 meters) 410 kc. (731 meters) 454 kc. (660 meters) | For ship-to-ship and ship-to-shore communications. |
425 kc. (705 meters) | It was recommended that ships now on 705 meters be transferred to the other assignments within a reasonable time. |
300 kc. (1,000 meters) | For radio beacon, with a guard band of 125 meters below (to 343 kc.) against broad emissions and nonsimple harmonically modulated CW and of 52 meters above 1,000 meters (to 285 kc.). An exception of the 952-meter wave length assigned to Government use was approved. Where CW and simple harmonically modulated CW are employed, the 1,000-meter wave should be guarded by a frequency separation of 15 kc. |
315 kc. (952 meters) | For Government use. |
375 kc. (800 meters) | For radio compass, with a guard band of 70 meters below (to 411 kc.) and of 70 meters above (to 345 kc.) 800 meters against broad emissions and nonsimple harmonically modulated CW. Where CW and simple harmonically modulated CW are employed, the 800-meter wave should be guarded by a frequency separation of 15 kc. |
445 kc. (674 meters) | For Government use upon aircraft and submarines, on CW, and ICW. |
500 kc. (600 meters) | For calling and distress signals and messages relating thereto, exclusive. |
2,500-2,750 kc. (120-109 meters) | For mobile marine services. |
STATION PARTICULARS | ||
Offending station | Station communicating with offending station | Reporting station |
Call letters | ||
Name | ||
Frequency (kilocycles) | ||
(Observed.) | (receiving wave interfered with.) | |
Wave length (meters) | ||
(Observed.) | (receiving wave interfered with.) | |
System employed: | ||
Spark | ||
Arc | ||
Tube, CW | ||
Tube, ICW | ||
Tube, phone | ||
Approximate location | ||
TIME AND NATURE OF INTERFERENCE OR VIOLATION | ||
Interference | Law or regulation violated | |
___ Off of assigned wave. | Date | Sec. _ _ of ship act of 7/23/12. |
___ Traffic not authorized on this wave. | Time | Sec. _ _ of radio act of 8/13/12. |
___ On assigned wave but interfering. | ____ GMT. | Article _ _ of London Radio Convention of 1912. |
___ Broad wave. | ____ Eastern. | Article _ _ of Service Regulations of London convention, 1912. |
___ Arc mush. | ____ Central. | Section _ _ of Radio Regulations of U. S. Dept of Commerce, edition Aug. 15, 1919. |
___ Poor modulation. | ____ Mountain. | Supplementary Radio Regulations of U. S. Dept. of Commerce, dated _ _ _ _ _ _ _. |
___ Harmonics. | ____ Pacific. | Is interference or offense satisfactorily covered by law or regulation? Yes. No. |
___ Frequency varies. | ||
___ Compensating wave. | How often does offense occur? | |
RECEIVING SET USED BY REPORTING STATION | ||
NAME-PLATE DATA | ||
Receiving set. | ____ Single circuit. | ____ Crystal detector. |
____ Two circuit. | ____ Vacuum tube detector. | |
Detector. | ____ Regenerative, nonoscillating. | ____ Number of stages of radio-frequency amplification. |
____ Regenerative, oscillating. | ____ Number of stages of audio-frequency amplification. | |
Amplifier. | ____ External heterodyne. |
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(Officer in charge of station.) |
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NOTE.--Further details are given in the various subcommittee reports on preceding pages. |