View Full Version : FM Radios with channel numbers???


Hawkwind
07-21-2020, 06:09 PM
Well, ???

You know, an FM radio with channel numbers on the display/dial...

MIPS
07-21-2020, 06:53 PM
As in FM receivers that can pick up the sideband text some stations broadcast that contains the station name and whatever was currently playing?

jr_tech
07-21-2020, 07:04 PM
Some early 45 mHz band FM sets displayed channel 21 to 99. Ch 21 was 42.1 mHz and the top end of the band Ch 99 was 49.9 mHz.

jr

Electronic M
07-22-2020, 09:19 AM
Some early 45 mHz band FM sets displayed channel 21 to 99. Ch 21 was 42.1 mHz and the top end of the band Ch 99 was 49.9 mHz.

jr

A few of the early post war band FM recievers did that too IIRC Capeheart was one such make to do it.

Chip Chester
07-22-2020, 01:07 PM
The audio for TV channel 6 (NTSC) was within the FM band. Local station used to advertise listening to it on your car radio.

mr_rye89
07-22-2020, 03:16 PM
Pre war FM band. Common Philco models include 42-390/42-350 (same chassis)

AdamAnt316
07-22-2020, 03:50 PM
Pre war FM band. Common Philco models include 42-390/42-350 (same chassis)
Actually, the channel numbers used for pre-war FM were, as jr_tech mentioned above, 21-99, corresponding to the last two digits of the 42.1-49.9 frequency range. The 200-300 channel numbers correspond to the modern 88-108MHz FM band, with this chart (https://en.wikipedia.org/wiki/List_of_channel_numbers_assigned_to_FM_frequencies _in_North_America) showing how they're assigned.
-Adam

jr_tech
07-22-2020, 04:43 PM
The 200-300 channel numbers correspond to the modern 88-108MHz FM band, with this chart (https://en.wikipedia.org/wiki/List_of_channel_numbers_assigned_to_FM_frequencies _in_North_America) showing how they're assigned.
-Adam

Or calculated:

Channel number = ((frequency - 87.9) X 5) + 200

jr

jr_tech
07-24-2020, 10:49 PM
Pre war FM band. Common Philco models include 42-390/42-350 (same chassis)

The Philco 42-350 and a Philco 42-355 are shown on this page from Wa2ise:

http://www.wa2ise.com/radios/fm45.html

Interesting to note that the channel numbers are contained in the call letters of some of the stations, such as W47NY.

jr

AdamAnt316
07-24-2020, 11:18 PM
The Philco 42-350 and a Philco 42-355 are shown on this page from Wa2ise:

http://www.wa2ise.com/radios/fm45.html

Interesting to note that the channel numbers are contained in the call letters of some of the stations, such as W47NY.

jr

They do the same thing with FM translators (https://www.fcc.gov/media/radio/fm-translators-and-boosters) nowadays. For example, WGAM 1250kHz in Manchester, NH has a FM translator on 103.5MHz with the callsign W278CJ.
-Adam

Jeffhs
07-24-2020, 11:52 PM
As late as the 1970s, some FM stations were still identifying with their call signs and channel number. I live near Cleveland and remember one such station on 105.7 MHz identifying as WKYC-FM, 105.7, channel 289, Cleveland, in the mid to late 1970s.

FWIW, the station was operated by NBC (the radio network was still in existence then; it was disbanded, however, some time [read decades] ago) at that time (1955-65 and 1965-'80). The AM station is now WTAM 1100, the FM is now WMJI, and the TV station is still WKYC-TV; however, the AM and FM stations changed owners and call signs several times since the '70s and are now, respectively, talk and classic hits (a.k.a. oldies) stations. The television station is still WKYC-TV; however, it is now owned and operated by Tegna Media and has been an NBC-TV affiliate since its initial sign-on in 1948.

TV-collector
07-29-2020, 09:04 AM
There are some german radios that have that information on
the scale.

Regards,
TV-Collector :stupid: