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Los Angeles Area Radio Stations as of June 30, 1922
From the Radio Service Bulletin, Department of Commerce

 
When the Department of Commerce started to license stations for “broadcasting entertainment, music, news, etc.” to the public, new radio stations went on the air much faster than the government anticipated.  All radio stations in Los Angeles and the rest of the United States, generally had to take turns transmitting on a wavelength of 360 meters.  That is equal to approximately 833 kilohertz on the standard AM band.  Some stations could also broadcast official government weather, market and crop reports.  However, to do that, station transmitters had to be re-tuned to 485 meters, or 619 kilohertz.  Four radio stations in Los Angeles also used the 485 meter wavelength, when necessary.  Those were KHJ, KWH, KYJ and KFCL. 

Since Congress had not yet passed a radio bill to regulate radio broadcasting in 1922, radio stations could not have their own frequencies to go on the air full-time.  The radio station owners and operators had to meet once a month to set up the days and hours that each station was allowed to go on the air.  By the end of August of 1922, there were 27 stations licensed, although not all of them were active. 

Here are the 24 radio stations licensed in and near Los Angeles on June 30, 1922:

*KHJ and KFI were moved from 360 meters to 400 meters (750 kilocycles) and were allowed to transmit with 500 watts of power in late 1922 and early 1923.  KHJ went on the air on 400 meters with its more powerful signal on November 1, 1922.  KFI began broadcasting with its new 500-watt transmitter on January 27, 1923.  Both stations were allowed to broadcast on the Class B wavelength of 400 meters at the same time, with one station 15 to 25 meters above 400 meters and the other station 15 to 25 meters below 400 meters.  The deal was worked out by Maj. J.F. Dillon, Federal Radio Inspector for the Sixth District.

Stations KYJ, KOG and KWH went off the air by January of 1923.  However, KWH was still broadcasting on 485 meters in 1923.  The other three stations combined with Earle C. Anthony’s KFI, to become the “Radio Central Super Station,” with the former KYJ and KOG broadcasting by remote control back to KFI.  The Examiner’s air time on KFI also originated from the KWH studio.

Los Angeles Area Radio Stations as of June 30, 1923
From the Department of Commerce Radio Service Bulletin

Los Angeles Area Radio Stations as of June 30, 1925
From the Department of Commerce Radio Service Bulletin

Los Angeles Area Radio Stations as of June 30, 1926
From the Department of Commerce Radio Service Bulletin

 Notes:  KNX was in Hollywood;   KPSN was in Pasadena;   KFWB was in Hollywood;   KMTR was in Hollywood;   KFON was in Long Beach;   KFQZ was in Hollywood; KFWO was on Catalina Island;   KFVD was in San Pedro;   KFXB was in Big Bear Lake and moved to Los Angeles in 1927, becoming KPLA and later KECA in 1929;  All other stations were in Los Angeles.

Los Angeles Area Radio Stations as of June 30, 1927
From the Department of Commerce Radio Service Bulletin

Los Angeles Area Radio Stations as of June 30, 1928
From the Department of Commerce Radio Service Bulletin

Los Angeles Radio Stations
New Frequency Allocations by the Federal Radio Commission
Effective November 11, 1928

* KNRC           This station changed owners and on or after November 11, 1928, and changed its call letters from KNRC to KTM.  The exact date this
call letter change occurred is unknown.

** KFON        The Long Beach station changed call letters to KFOX on December 31, 1928.

*** KFWO had already gone off the air during 1928, when the owner, Lawrence Mott, was married and moved from Catalina Island to the Hollywood hills. 
The F.R.C. deleted the KFWO license in January of 1929.

Los Angeles Area Radio Stations as of June 30, 1929
Federal Radio Commission Listings

* KGFH Glendale on 1000 kilocycles was deleted by the F.R.C. in June of 1929;  KPLA in Los Angeles, moved from 570 to 1000, and KMTR became a full-time station.  On November 15, 1929, KPLA was sold to Earle C. Anthony and became KECA, on 1430 kilocycles.

Los Angeles Area Radio Stations as of November 15, 1929
With Federal Radio Commission Changes

Notes on FRC Changes Effective November 15, 1929

KEJK 710 moved from 1170

KFWB 950 now on full-time.  It previously shared-time with KPSN.

KFVD 1000 had previously broadcast at 700 and 710 on the dial the last 12 months

KGFJ 1200 was previously on 1420.

KPPC 1210 moved 10 kilocycles from 1200.

KGER 1360 moved from 1370, and shares time with KPSN, which left the air in 1931.

KPSN moved from 950 to 1360, sharing time with KGER

KECA 1430 was formerly KPLA, at 1000 kilocycles. The station was sold to Earle C. Anthony at the same time the frequency and call letter change was made.

Los Angeles Area Radio Stations as of June 30, 1930
From the listings of the Federal Radio Commission