1946 T.W. Elliott, a General Motors executive, opened CKDO on October 5th.  The "DO" in the call letters represented the station's service area, Durham and Ontario Counties.  Studios were located in the Genosha Hotel, 70 King Street East.  CKDO operated on 1240 kHz with 100 watts of power full-time (non-directional).  The transmitter was on Westmount Avenue.  The station was on the air from 6:30am to 11:00pm daily. (Photo from heritageoshawa.ca).
	1948 On June 26, CKDO's studios were moved from the Genosha Hotel to 16 Centre Street. (Photo from A.H. Collins). 1950 CKDO became CKLB, the "LB" for new owner, Lakeland Broadcasting Co., Ltd.  Lakeland was owned by A. H. Collins. 1952 CKLB increased power from 100 to 250 watts.
	1953 August 15, Robert Steele, Assistant Engineer of CKLB, lost his life when the CKLB special events truck, driven by radio announcer Rob Taggert, and a Toronto automobile, crashed almost headon on Highway 12, just north of Brooklin. Steele was a passenger of the CKLB special events truck.
	1956 Gordon Garrison formed a group to purchase CKLB from A. H. Collins.  The corporate name changed slightly to The Lakeland Broadcasting Co. Ltd.  Following the approval of sale, CKLB switched frequency from 1240 to 1350 kHz and increased power from 250 watts full-time to 5,000 full-time (two directional patterns).  The transmitter and four 125 foot towers were located near Courtice, in Durham County.  Studios and offices remained at 16 Centre Street. (Photo from A.H. Collins).
	1957 CKLB-FM began broadcasting on September 12.
	1960 Around 1960, CKLB increased power to 10,000 watts day and 5,000 watts night on 1350 kHz.  The same transmitter site was used but in addition to the four 125 foot towers, one 186 foot tower was added to the array.
	1963 Studios and offices were re-located to 360 King Street West. 1966 CKLB-FM became CKQS-FM on June 6.
	1979 Grant Broadcasting Ltd. (George Grant) purchased CKLB and CKQS-FM from Lakeland Broadcasting Co. Ltd. (Gord Garrison). On March 19, just after 9am, CKLB with an adult contemporary format, became CKAR with a contemporary hits format.  The "KAR" in the new call letters was for "car" - Oshawa is the "Motor City", with General Motors being the largest employer. In February, CKQS-FM became CKQT-FM.
	1985 CKAR switched from adult contemporary to a country format in the fall.
	1986 The format changed in the fall, to adult contemporary from a mix of A/C and country.
	1988 On February 12, the sale of CKAR by Grant Broadcasting Ltd. to CKAR-AM Radio Ltd. (R. Daniel Pickett), was approved. Pickett was a marketing consultant with over 25 years of experience in the cable television and communications industries and had no other media holdings.  George Grant would serve as a consultant to the new company.  General Manager Scott Cameron was a director of the new company.  For a variety of reasons, this transaction was never completed and Grant Broadcasting continued as owner of CKAR-AM.
	1990 On September 27, the sale of CKAR and CKQT-FM by Grant Broadcasting Ltd. to Power Broadcasting Inc. was approved.
	1992 CKAR switched back to its original call letters - CKDO, on March 30 at 6:00am.  The format changed from Adult Contemporary to Oldies - Top 40 music of the 50's, 60's, and early 70's, with an emphasis on mid-to-late 60's music.  This time the "DO" in the call letters stood for Durham-Oshawa (and Durham's Oldies). The new format was chosen as a result of listener feedback since the past summer when the station (known during this period simply as "AM 1350") became the country's first listener-designed radio station.  Listeners were invited to call in and suggest changes and improvements to the station. Besides the new format, other improvements were to include new antenna towers, new transmitter, digital studio equipment, and the use of CD's and digital audio tape.
	1994 On December 6, Don Allman passed away.  He was the announcer that put the original CKDO on the air in 1946, with a program called "The Old Ranchouse".  Don left for CHEX in Peterborough in 1948, but returned to Oshawa around 1950.  He worked at General Motors for 40 years and returned to the Oshawa airwaves in the mid-70's when he retired from GM.  He continued his on-air work until 1992.
	1996 On June 1, CKDO began simulcasting the programming of sister station CKGE-FM.
	1997 Early in the year, CKDO was airing programming separate from CKGE-FM, although the format was similar to the FM's station's. CKDO and CKGE moved to new studios and offices at the Oshawa Airport, 1200 Airport Blvd.
	1998 CKDO was again doing some simulcasting with CKGE-FM.
	2000 On March 24th, the sale of Power Broadcasting Inc. (including CKDO and CKGE) to Corus Entertainment INc. by Power Corporation was approved.  Corus took control of the stations on April 13.
	2001 In February, Corus created a six station Ontario talk network consisting of CHML 900 Hamilton, CFPL 980 London, CKDO 1350 Oshawa, CKRU 980 Peterborough, CFFX 960 Kingston, and CJOY 1460 Guelph.  Talkshows from CHML and CFPL were simulcast on the network during certain dayparts, seven days a week. In the summer, CKDO returned to an all-oldies music format.
	2002 In February, the CKDO "AM 1350" morning show began simulcasting over sister station CHEX-TV channel 22, Oshawa.
	2003 On April 23, the sale of CKDO and CKGE-FM by Corus Entertainment Inc. to Durham Radio Inc. was approved.  Durham Radio Inc. owned CJKX-FM "KX96" in nearby Ajax.  Durham Radio Inc. took control of CKDO and CKGE in early June. On September 1, CJKX joined CKDO and CKGE at 1200 Airport Blvd, suite 207, Oshawa.
	2004 On August 20, CKDO was authorized to add an FM booster in Oshawa.  CKDO proposed to operate the new transmitter on 107.7 MHz with an effective radiated power of 250 watts.  That frequency was awarded to CKMB-FM Barrie in a competing application.  CKDO was asked to seek an alternate channel.  It later turned out that 107.7 could not be used in Barrie so CKDO was given the go ahead to use it at Oshawa.
	2005 CKDO 1350's new booster transmitter - CKDO-FM-1 (on 107.7 MHz) began broadcasting on March 30.  The FM booster was designed to fill gaps, especially at night, in the AM signal, particularly in Oshawa, Whitby, and Ajax. On November 15, CKDO was given approval to change its main frequency from 1350 to 1580 kHz and to increase power from 10,000 watts day and 5,000 watts night to a full-time power of 10,000 watts.  The same transmitter site would be used and the number of towers would be reduced from five to two.  On 1350, CKDO had different patterns for day and night operation.  On 1580, the station would use the same pattern, day and night. 2006 Just after the 10:00 a.m. news, August 13, CKDO left the 1350 frequency. The station returned to the air late that evening on its new 1580 frequency. The down time between 1350 and 1580 was spent setting up the transmitter for the new frequency. CKDO continued to operate on 107.7 FM in addition to the new, stronger 1580 kHz. 2007 On February 23, Durham Radio Inc. was authorized to increase the effective radiated power of CKDO-FM-1 from 250 watts to an average ERP of 665 watts (maximum ERP of 2,000 watts). The increase wou 2008 On February 23, Durham Radio Inc. was authorized to increase the effective radiated power of CKDO-FM-1 from 250 watts to an average ERP of 665 watts (maximum ERP of 2,000 watts). The increase would improve the reception of CKDO-FM-1, optimize the use of 107.7 MHz by counteracting co-channel interference from U.S. station WLKK-FM  Weathersfield ,   N.Y. , and continue the turnaround of CKDO from both a listener acceptance and a financial standpoint. 2009 Former CKDO-CKGE (Lakeland Broadcasting Co. Ltd.) owner Gord Garrison passed away.
	Written by Bill Dulmage - December 2005