Broadcast History - March 16

Broadcast History - March 16

Postby jon » Wed Mar 15, 2023 8:31 pm

In 1936, CKY Winnipeg had 15,000 watts and moved from 960 to 910 KHz. But moved back to 960 KHz on September 16, 1937, only to move again to 910 KHz on October 17th. The final frequency move came in The Great North American Frequency Shuffle of 1941, when CKY moved to 990 KHz on March 29th. The station, as CBW, is still there today.

In 1981, The Regina Leader-Post newspaper, which owned CKCK, was licensed for a new FM station, which signed on the next year as CKIT-FM on 104.9 MHz with 100,000 watts. Today, the station is CFWF-FM owned by Harvard Communications, which also owns CKRM-AM and CHMX-FM.


In 2006, the CBC received approval for nested FM repeaters in downtowns of major Prairie cities:
  • CBX Edmonton was approved for a 3931 watt FM repeater in downtown Edmonton. CBX-2-FM signed on the next year on 93.9 MHz with reduced power because of building wiring issues within the commercial building where the transmitter was located.
  • CBR Calgary was assigned to 99.1 MHz with 1100 watts. CBR-1-FM signed on January 27, 2007. On January 23, 2008, the CBC was approved for a power increase to 2800 watts, with a decrease in antenna height.
  • CBK Watrous, built in 1939 on 540 KHz to serve both Saskatoon and Regina, was approved for an FM repeater in downtown Regina. CBK-1-FM signed on to 94.1 MHz with 4100 watts in 2007.
  • Two FM transmitters were approved for Winnipeg. French language CKSB St. Boniface was assigned to 90.5 MHz as CKSB-10-FM. And English language CBW Winnipeg to 89.3 MHz. Both transmit with 2800 watts from a tower atop the Richardson Building.
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Re: Broadcast History - March 16

Postby don'tpanic » Thu Mar 16, 2023 4:48 pm

That 910 AM frequency was not the greatest. Engineering pros can give the precise reason, but as was explained to me, 910 is a multiple of 455 khz, the internal frequency used in AM radios back in the day (maybe still is?). This produced an audible 'whistle' or tone, which one could reduce by tuning away from 910 just a little bit.
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