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- General_Order_40 abstract "General Order 40 was an order issued on August 30, 1928 by the new Federal Radio Commission under the Radio Act of 1927 which provided for a reallocation of the commercial broadcast radio spectrum.As a result of implementation of General Order 40, most U.S. radio stations were forced to change their broadcast frequencies. The frequency changes went into effect at 3:00 a.m. Eastern time on November 11, 1928.The goals of the FRC in reallocating the frequencies were to reduce interference and "clutter" on the air, to provide better access to the airwaves to smaller cities, and "underserved" areas, and to rid the air of "temporary" and "portable" stations. This was achieved by designating each frequency as either a frequency for one (or more) clear-channel stations broadcasting with maximum power, a frequency to be shared by regional stations with less power, or a frequency to be shared by many local stations with limited power. Each clear channel frequency was reserved for one principal station in one of five U.S. zones or in Canada. Some of these clear frequencies were shared with one or more lower power stations in locations remote from the principal station. The U.S. was divided into the five zones used by the Radio Act of 1927, as shown on the map to the right.The allocation scheme introduced by General Order 40 stayed in place for over twelve years, until the implementation of the North American Radio Broadcasting Agreement in March 1941.Stations show in bold are the original 1928 Band Plan internationally cleared station primary allocations. Station(s) on the same frequency are either: 1) shared allocations, 2) daytimers, or 3) secondary stations which eventually achieved full-time status, but at lower power or highly directionalized so as to protect the primary station.The table below presents a general outline of the frequency allocations under the order. For "Clear" frequencies, the zone allocated to the principal station on that frequency is given, along with the principal station that actually occupied the frequency, the previous frequency of the actual principal station, and other stations that shared the frequency. Station call signs shown in parentheses are stations owned by the same licensee of the principal station on that frequency. General Order resulted in several instances in which two stations were forced to share the same frequency:WFAA in Dallas and WBAP in Fort Worth were forced to share a clear channel frequency at 800 kHz. Eventually, both stations also obtained a regional frequency which they also shared. As a result, these two stations operated alternately on two different frequencies for many years.WLS and WENR, both Chicago, also had to share a frequency at 870 kHz. This continued until 1959 when ABC purchased both stations.WHO in Des Moines and WOC in Davenport were forced to share the single clear channel frequency at 1000 kHz which was allocated for the state of Iowa. Both stations fought the shared allocation and lost. Eventually WHO bought out WOC and consolidated operations in Des Moines.KFAB in Lincoln, Nebraska shared the 770 frequency with WBBM in Chicago. To avoid interference, KFAB was forced to carry the same network programming as WBBM at night and to synchronize its transmissions.WBAL in Baltimore and WTIC in Hartford shared the 1070 frequency.WOWO in Fort Wayne and WWVA in Wheeling shared the frequency at 1160 kHz.At 850 kHz KWKH in Shreveport and WWL in New Orleans shared the single frequency allocated to Louisiana.The 790 kHz clear channel frequency was allocated to zone 5, and General Electric's KGO in Oakland received the assignment for this frequency, but GE was also able to use the frequency for its stronger station WGY in Schenectady. The 1020 kHz frequency was assigned to zone 2, but the strongest station licensed on the frequency was KYW in Chicago, not WRAX in Philadelphia; this was resolved when KYW moved to Philadelphia in 1934, forcing WRAX to move to the regional frequency of 920 kHz, sharing time with WPEN which was already there.".
- General_Order_40 thumbnail Federal_Radio_Commission_General_Order_40_Map.png?width=300.
- General_Order_40 wikiPageExternalLink 280831.pdf.
- General_Order_40 wikiPageExternalLink clears.htm.
- General_Order_40 wikiPageID "4188688".
- General_Order_40 wikiPageLength "34704".
- General_Order_40 wikiPageOutDegree "257".
- General_Order_40 wikiPageRevisionID "659906406".
- General_Order_40 wikiPageWikiLink Albuquerque,_New_Mexico.
- General_Order_40 wikiPageWikiLink Ames,_Iowa.
- General_Order_40 wikiPageWikiLink Atlanta.
- General_Order_40 wikiPageWikiLink Atlantic_City,_New_Jersey.
- General_Order_40 wikiPageWikiLink Baltimore.
- General_Order_40 wikiPageWikiLink Bandplan.
- General_Order_40 wikiPageWikiLink Birmingham,_Alabama.
- General_Order_40 wikiPageWikiLink Boston.
- General_Order_40 wikiPageWikiLink Bridgeport,_Connecticut.
- General_Order_40 wikiPageWikiLink Buffalo,_New_York.
- General_Order_40 wikiPageWikiLink CBF-FM.
- General_Order_40 wikiPageWikiLink CBU_(AM).
- General_Order_40 wikiPageWikiLink CBW_(AM).
- General_Order_40 wikiPageWikiLink CFRB.
- General_Order_40 wikiPageWikiLink CFRN_(AM).
- General_Order_40 wikiPageWikiLink CFZM.
- General_Order_40 wikiPageWikiLink CINW.
- General_Order_40 wikiPageWikiLink CJAQ-FM.
- General_Order_40 wikiPageWikiLink CJAT_(AM).
- General_Order_40 wikiPageWikiLink CKAC.
- General_Order_40 wikiPageWikiLink CKWX.
- General_Order_40 wikiPageWikiLink Calgary.
- General_Order_40 wikiPageWikiLink Carthage,_Illinois.
- General_Order_40 wikiPageWikiLink Category:American_radio.
- General_Order_40 wikiPageWikiLink Category:Broadcast_law.
- General_Order_40 wikiPageWikiLink Category:United_States_communications_regulation.
- General_Order_40 wikiPageWikiLink Charlotte,_North_Carolina.
- General_Order_40 wikiPageWikiLink Chicago.
- General_Order_40 wikiPageWikiLink Cincinnati.
- General_Order_40 wikiPageWikiLink Clay_Center,_Nebraska.
- General_Order_40 wikiPageWikiLink Clear-channel_station.
- General_Order_40 wikiPageWikiLink Cleveland.
- General_Order_40 wikiPageWikiLink Columbus,_Ohio.
- General_Order_40 wikiPageWikiLink Covington,_Kentucky.
- General_Order_40 wikiPageWikiLink Dallas.
- General_Order_40 wikiPageWikiLink Davenport,_Iowa.
- General_Order_40 wikiPageWikiLink Daytimer.
- General_Order_40 wikiPageWikiLink Denver.
- General_Order_40 wikiPageWikiLink Des_Moines,_Iowa.
- General_Order_40 wikiPageWikiLink Detroit.
- General_Order_40 wikiPageWikiLink East_Lansing,_Michigan.
- General_Order_40 wikiPageWikiLink Edmonton.
- General_Order_40 wikiPageWikiLink Federal_Radio_Commission.
- General_Order_40 wikiPageWikiLink Fort_Wayne,_Indiana.
- General_Order_40 wikiPageWikiLink Fort_Worth,_Texas.
- General_Order_40 wikiPageWikiLink Gainesville,_Florida.
- General_Order_40 wikiPageWikiLink General_Electric.
- General_Order_40 wikiPageWikiLink Hartford,_Connecticut.
- General_Order_40 wikiPageWikiLink Hot_Springs,_Arkansas.
- General_Order_40 wikiPageWikiLink KAAY.
- General_Order_40 wikiPageWikiLink KCMO_(AM).
- General_Order_40 wikiPageWikiLink KCRO.
- General_Order_40 wikiPageWikiLink KDKA_(AM).
- General_Order_40 wikiPageWikiLink KEX_(AM).
- General_Order_40 wikiPageWikiLink KFAB.
- General_Order_40 wikiPageWikiLink KFAN_(AM).
- General_Order_40 wikiPageWikiLink KFAQ.
- General_Order_40 wikiPageWikiLink KFAX.
- General_Order_40 wikiPageWikiLink KFI.
- General_Order_40 wikiPageWikiLink KFKB.
- General_Order_40 wikiPageWikiLink KGA.
- General_Order_40 wikiPageWikiLink KGO_(AM).
- General_Order_40 wikiPageWikiLink KHTK.
- General_Order_40 wikiPageWikiLink KIRO_(AM).
- General_Order_40 wikiPageWikiLink KJR_(AM).
- General_Order_40 wikiPageWikiLink KKMO.
- General_Order_40 wikiPageWikiLink KKOB_(AM).
- General_Order_40 wikiPageWikiLink KMOX.
- General_Order_40 wikiPageWikiLink KMPC.
- General_Order_40 wikiPageWikiLink KNBR.
- General_Order_40 wikiPageWikiLink KNX_(AM).
- General_Order_40 wikiPageWikiLink KOA_(AM).
- General_Order_40 wikiPageWikiLink KOKC_(AM).
- General_Order_40 wikiPageWikiLink KRLD_(AM).
- General_Order_40 wikiPageWikiLink KSL_(radio).
- General_Order_40 wikiPageWikiLink KSOO_(AM).
- General_Order_40 wikiPageWikiLink KSTP_(AM).
- General_Order_40 wikiPageWikiLink KTNQ.
- General_Order_40 wikiPageWikiLink KWKH.
- General_Order_40 wikiPageWikiLink KWKH_(AM).
- General_Order_40 wikiPageWikiLink KYW_(AM).
- General_Order_40 wikiPageWikiLink Kansas_City,_Missouri.
- General_Order_40 wikiPageWikiLink Lincoln,_Nebraska.
- General_Order_40 wikiPageWikiLink Los_Angeles.
- General_Order_40 wikiPageWikiLink Louisville,_Kentucky.
- General_Order_40 wikiPageWikiLink Milford,_Kansas.
- General_Order_40 wikiPageWikiLink Minneapolis.
- General_Order_40 wikiPageWikiLink Montreal.
- General_Order_40 wikiPageWikiLink Muscatine,_Iowa.
- General_Order_40 wikiPageWikiLink Nashville,_Tennessee.
- General_Order_40 wikiPageWikiLink New_Orleans.
- General_Order_40 wikiPageWikiLink New_York_City.