Talk:History of wireless telegraphy and broadcasting in Australia/Topical/Lists/AM Radio Frequencies

Wavelength vs Frequency
The Washington Conference 1927 adopted the use of frequency rather than wavelength to designate radio emissions. But Australia was a little slow to implement. Only for the first full list of broadcast stations included in the PMGD Annual report for 1930 were stations identified in terms of wavelength. Subsequent annual reports all used frequency. It seems confusing to me to refer to wavelengths after 1930, when the licences were all stated in frequency and the wavelength would be at best an approximation.--Samuel.dellit (talk) 09:45, 20 March 2019 (UTC)
 * I understand that before the advent of frequency counters, wavelength (which can be measured directly) was considered the fundamental property of a radio wave, and frequency inferred if the need arose (much as the similar property of light continues to be specified in nanometres). The need for precision arose with higher power transmitters and the cluttered broadcast band, and was supplied by crystal-controlled oscillators, rather than nicely calibrated VFOs. But public acceptance of the new-fangled "kilocycles per second" from the comfortable "metres" would have been even slower than its renaming to "kilohertz" which happened in our lifetimes and even that was met with a great deal of resistance, not to say hostility. And I believe amateur radio enthusiasts and radar technicians still talk in terms of wavelength on occasion, for good reason. But I digress. 1935, as the time of the great reallocation of frequencies, is a good time for first and last mention of the wretched wavelength and having those numbers pinked out should avoid confusion but serve as a reminder that such was once the norm. Doug butler (talk) 04:14, 22 March 2019 (UTC)

Abbreviations for Type
This list presently uses the following abbreviations for "Type":
 * A = Government funded (including SBS radio).
 * B = self funded (now called "commercial" but historic term retained here)

I suggest that a more comprehensive set of abbreviations be utilised and that "Type" be renamed "Category" in line with current practice: All thoughts welcome.--Samuel.dellit (talk) 06:38, 21 March 2019 (UTC)
 * S = Sealed Set - under Wireless Regulations 1922
 * A = A Class - post Wireless Regulations 1924
 * B = B Class -  post Wireless Regulations 1924
 * C = Commercial
 * NA = National (ABC) -  Stations of the Australian Broadcasting Commission (1932-1983), Corporation (1983-present), licensed from 1992
 * NS = National (SBS) -  Stations of the Special Broadcasting Service
 * NP = National (Parliamentary) -  Stations of the Parliamentary News Network, carry ABC News when Parliament not sitting
 * PC = Public / Community -  Public broadcasting services from about 1975 to 1992, renamed Community broadcasting services as part of BSA92
 * T = TCBL -  Temporary Community Broadcasting Licence
 * R = Retransmission -
 * NC = Narrowcast -  ie HPON (High Power Open Narrowcast)
 * NB = Narrowband -  ie MF-NAS ("Medium Frequency - Narrowband Area Service")
 * SE = Special Event
 * Note that there are several other categories of broadcasting services, but they are not allocates

References for station frequencies
It's probably useful to list principal sources for data on AM radio frequency allocations, in case any further Wikipedians get involved in this project: Enjoy.--Samuel.dellit (talk) 23:12, 22 March 2019 (UTC)
 * Trove digitised newspapers (vast number of articles already tagged and text corrected, just search on "PublicTag:{Callsign}"
 * Annual reports of PMGD, ABCB, P&TD, DoC1, DoTaC, ABT, ABA, ACMA (available most larger libraries, many online at Australian Policy Online)
 * National Archives of Australia
 * Wireless Weekly (Aus), all issues digitised by Mitchell library and placed online in Trove
 * Various wireless/radio magazines of the period, many of which are digitised and published online at AmericanRadioHistory.com

Copied from Wikipedia
The following has been copied from Talk: List of Australian AM radio stations as it relates to this table:

G'day Guys

From feedback that I see here and privately, the substantial changes that I am proposing would not be well received. Accordingly, I have arranged to import this page into my Wikibook: The imported list has been properly imported thanks to @Leaderboard and reflects all contributions up to the date of import. The imported list is here: In support of future work which will strip all references to wavelengths, I am now well advanced on a table of the various frequency rasters which have been used in Australia: The table can be found here: As usual, all comments welcome. --Samuel.dellit (talk) 00:02, 7 April 2019 (UTC)
 * History of wireless telegraphy and broadcasting in Australia
 * AM Radio Frequencies
 * The "1m" one metre raster used from the start of broadcasting in Australia in November 1923 until about the end of 1930.
 * The "5kHz" five kilohertz raster which was utilised from about the start of 1931 until 31 August 1935.
 * The "10kHz" ten kilohertz raster which was utilised from 1 September 1935 until 22 November 1978.
 * The "9kHz" nine kilohertz raster which has been utilised from 23 November 1978 to the present.
 * AM Radio Rasters