Radio societies' meetings: Ionospheric characteristics and radio transmission

• Publisher: Elsevier Science
• Year: 1940
• Tongue: English
• Weight: 103 KB
• Volume: 230
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(40)90654-8

✦ Synopsis

Beginning on May I, the following changes became effective in the standards of frequency and musical pitch broadcast from the Bureau's radio station WWV at Beltsville, Md. : (a) The frequency of 2o megacycles per second has been replaced by I5 mc./sec.; (b) announcements are given by voice only, not by telegraphic keying; (c) announcements during the musical pitch broadcasting are given every 5 instead of every IO minutes; (d) the ionosphere bulletins have been discontinued.

The standard frequency broadcasts now include: Standard radio frequencies; standard time intervals (seconds pulses); standard audio frequency; and standard musical pitch (44o c./sec.). The last named, and its carrier, a standard 5 mc./sec., are broadcast continuously, day and night.