Chart Explanation

The chart provides a chronological review of the U.S. broadcasting service additions, deletions, and changes that took place during the period from October, 1920 through the end of June, 1922.
Sample Entry
 # |Type Date     Call Location             Owner                             Freq |Date    Type Loc |Date     Dur Num |Status as of 1/1/2019   |
 82|TG   03/15/22 WSB  Atlanta, GA          Atlanta Journal                     EM |03/15/22 TG  OWN |04/11/22 3M  630 |WSB-750 Atlanta, GA     |

Above is a sample chart listing, in this case for for WSB in Atlanta. Information for each new/relicenced station entry is divided into four main sections:
Detailed explanations of the four sections follow.

 # |Type Date     Call Location             Owner                             Freq |
 82|TG   03/15/22 WSB  Atlanta, GA          Atlanta Journal                     EM |

The majority of the actions listed are new station grants. Station additions are listed chronologically by their initial broadcasting service authorization date.

Under "Type", "LIC" refers to the standard case where the station's first broadcast authorization was a licence. "TRN" denotes stations whose first broadcast licence was issued in conjunction with a transfer from a previous non-broadcast service classification, using the same callsign. "REL" refers to the relicencing of a previously deleted broadcast station, which for the purposes of this list is considered to be the same station. In a few cases an authorization to broadcast was made before the station's first licence was issued. Initial authorizations by telephone and telegraph are denoted "TP" and "TG" respectively. "STA" stands for "Special Temporary Authorization", while "AUT" appears in a case where the station is only listed as "authorized".

Also included in this section is the station's callsign, location, owner, and frequency at the time of the authorization. "E" denotes the entertainment wavelength of 360 meters (833 kilohertz), while "M" refers to the market and weather wavelength of 485 meters (619 kilohertz). "EM" denotes authorization for both wavelengths.

In WSB's case, its initial broadcast service authorization, #82 on the list, was a telegram ("TG") received on March 15, 1922, authorizing operation on both wavelengths ("EM").

|Date    Type Loc |
|03/15/22 TG  OWN |
|02/01/22 761 BOS |

The second column covers the callsign assignment, which, as noted earlier, was a part of the application process, and took place prior to the issuance of a licence or other operating authorization. The two examples, listed above, are for WSB and WGI. The three entries listed under the Call Assignment column are the date of the call assignment ("Date"), the form of the station application ("Type"), and its origin ("Loc").

For "Type", in most cases the standard procedure was followed, with a call assigned upon the receipt in Washington of a Form 761 (761) from a regional Radio Inspector. Most exceptions to the standard procedure occurred when the station owner dealt directly with Washington, via telephone (TP), telegraph (TG), letter (LET), or call letter reservation (RES). In one case W. E. Downey (WED) was listed as the person involved in making the call assignment.

"Loc" normally refers to the Radio Inspection Distict which was responsible for sending the station authorization request to Washington. The nine Radio Inspection Districts were headquartered in the following locations:
  1. BOS-Boston, Massachusetts
  2. NYC-New York, New York
  3. BAL-Baltimore, Maryland
  4. SAV-Savannah, Georgia
  5. NO-New Orleans, Louisiana
  6. SF-San Francisco, California
  7. SEA-Seattle, Washington
  8. DET-Detroit, Michigan
  9. CHI-Chicago, Illinois
In addition, a few of the Form 761s came via Norfolk, Virginia (NOR) and Philadelphia, Pennsylvania (PHI) (Radio Inspection Districts map) Also, in a few cases the station owner (OWN) dealt directly with the Commerce Department in Washington, D.C.

In the two examples above, WSB was one of the exceptional cases--instead of submitting a Form 761, its initial application arrived in Washington on March 15, 1922 as a telegram ("TG") from the station owner ("OWN"). Listed below WSB is the entry for WGI, which followed the more conventional route, in this case a Form 761, filed via the Radio Inspector in Boston ("BOS"), which was received in Washington on the first of February.

|Date     Dur Num |
|04/11/22 3M  630 |

The third column notes the date of the first broadcast service licence, the duration of that initial licence (with "D" signifying days, "M" months, and "YR" years), and the licence number assigned.

In the vast majority of cases, a station's first licence was also its first formal broadcast service authorization, so the date in the "1ST BROADCAST LIC" column is the same as the one listed under "STATION'S INITIAL BROADCAST SERVICE AUTHORIZATION", reviewed earlier. However, a few stations received other types of authorizations prior to the issuance of their first licence. For example, in the case of WSB, its "1ST BROADCAST LIC" date was April 11, 1922, when it was issued licence #630, a 3-month authorization. However, WSB's "STATION'S INITIAL BROADCAST SERVICE AUTHORIZATION" date is March 15, 1922, reflecting its earlier authorization by telegram.

NOTE: The first nine stations on the list date to before the formal creation of the broadcast service on December 1, 1921. The December 1, 1921 regulations required that broadcast service stations hold a Limited Commercial licence that explicitly authorized operation on 360 and/or 485 meters. However, as of December 1st nine stations already held Limited Commercial licences specifying operation on 360 meters. For these stations, the date in the "STATION'S INITIAL BROADCAST SERVICE AUTHORIZATION" column is that of the station's first Limited Commercial licence, while the date in the "1ST BROADCAST LIC" column is that of its first licence to explicitly specify operation on 360 meters.

|Status as of 1/1/2019   |
|WSB-750 Atlanta, GA     |
The fourth, and final, column lists the eventual fate of the station--either its deletion date (with callsign if different from the original) or status as of January 1, 2019. In the case of WSB, most of the eastern United States can still hear WSB nightly, at 750 on your AM dial.

Overall Standards

When only the month of an action is known, usually reflecting information derived from the Radio Service Bulletin, two dashes appear for the day the action took place. A "(?)" marks a "best guess" required because of incomplete or ambiguous data, which in most cases should not be more than a few days off. As might be expected, some errors, both in the original records and during the research process, must be assumed to have crept in. However, extensive cross-referencing of original records and other source material should insure that errors have been minimized.

The one entry which must be viewed with due caution is current status. Unlike human beings, who have clearly defined births, lives, and deaths, these stations sometimes had very complicated histories, complete with resurrections, callsign and ownership changes, consolidations of two or more stations under a single call, and facility exchanges. Review of the station histories sources such as S. E. Frost's Education's Own Stations will give a good idea of the tumultuous histories some of these stations enjoyed. With this caveat in mind, the status information was included to provide an overview of the fate of these stations, although a few station histories are too tangled to allow easy refinement to a single entry.

A general standard for status entries was that, in case of doubt, the nod was given to interpretations which provide continuity and longevity. In particular, stations which were deleted but then immediately relicenced were treated as having a single unbroken lifespan, so deletion dates are those where the final unreversed deletion took place, and stations listed as still active might have been deleted and then relicenced somewhere along the way.