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11/23/43
"In these days of heavy demands upon Government employees for taxes, the purchase of War bonds, subscriptions to the Red Cross so that persons of high estate may perform world travel and subscriptions to the Community War Fund, which is an enlarge¬ ment of the old Community Chest, and which spends its money, in part, through an ideological organization which busies itself with the rescue and bringing of alien refugees to this country, it seems our Government workers have enough legitimate uses for their surplus change, without being asked to buy dinner tickets at $4.50 each for the purpose of honoring any Government official. "
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STANDARDS BUREAU FREQUENCY BROADCASTS STREAh^LINED
The broadcast service of the National Bureau of Standards new station WWV at Baltsville, Md. , has been improved and extended 80 that it now includes: (1) standard radio frequencies, (2) stand¬ ard time intervals accurately synchronized with basic time signals,
(3) standard audio frequencies, (4) standard musical pitch, 440 cycles per second, corresponding to A above middle C.
This service makes widely available the national standard of frequency, which is of value in scientific and other measurements. Any desired frequency may be measured in terms of any one of the standard frequencies, either audio or radio. This may be done by the aid of harmonics and beats, with one or more auxiliary oscilla¬ tors.
The service is continuous at all times day and night. The standard radio frequencies are 5 megacycles per second, broadcast continuously; 10 megacycles per second, broadcast continuously; and 15 megacycles per second, broadcast continuously in the daytime (i.e. day at Washington, D. C, ) .
All the radio frequencies carry two audio frequencies at the same time, 440 cycles per second and 4,000 cycles per second; the former is the standard musical pitch and the latter is a useful standard audio frequency. In addition, there is a pulse every sec¬ ond, heard as a faint tick each second when listening to the broad¬ cast.
The audio frequencies are interrupted precisely on the ^our and each 5 minutes thereafter; after an interval of precisely 1 minute they are resumed. This 1-minute interval is provided in order to give the station announcement and to afford an interval for the checking of radio-frequency measurements free from the presence or the audio frequencies. The announcement is the station call letters (WWV) in telegraphic code (dots and dashes) except at the hour and half hour when "the announcement is given by voice,
"The accuracy of all the frequencies, radio and audio, as transmitted, is better than 1 part in 10,000,000. The time interval