border (convergence with Modernine TV, MCOT Modern Radio, and Thai News Agency) Commercial breaks The logo is shown on commercial breaks and test transmissions. Clocks The clock in Thailand was not in colour until 1974. Originally the clock was based on the clock tower in Bangkok in black and white. In 1974 the clock was yellow on blue. Test card Until the introduction of 24-hour broadcasting in 2002, MCOT used the PM5544 test pattern during the off-air hours of TV9 and EBU Colorbars on Channel 3. Until 2002, MCOT used the Philips PM5534 (PM5544 with clock) during off-air hours. On-air and off-air Currently both stations broadcast 24 hours a day. Channel 9 MCOT HD 1955–1960 Channel 4 broadcast from 19:00–23:00 Bangkok Time. 1961–1967 Channel 4 broadcast from 18:00–23:30. 1968–1976 Channel 4 (and from 1974, Channel 9) broadcast from 15:00–24:00. 1977–1984 Channel 9 broadcast from 13:00–24:00. 1985–1990 Channel 9 broadcast from 10:00–24:00. 1990–1993 Channel 9 broadcasts for 12 hours daily, 12:00–24:00. 1994–2002 Channel 9 broadcasts for 20 half hours daily, 05:30–02:00. 1 February – 30 June 2017 Channel 9 broadcasts for 21 hours on weekday, 04:00–01:00. (for 20 half hours on Saturday and Sunday, 05:30–02:00) 2002–31 January 2017,1 July 2017–Present Channel 9 broadcasts 24/7. ThaiTV3 1970–1987 Channel 3 broadcasts for six hours daily, 18:00–24:00. 1987–1990 Channel 3 broadcasts for eight hours daily, 16:00–24:00. 1990–1993 Channel 3 broadcasts for 12 hours daily, 12:00–24:00. 1994–2004 Channel 3 broadcasts for 18 hours daily, 06:00–24:00. 2005–Present Channel 3 broadcasts 24/7. MCOT Family 1 April 2014 – 24 May 2014: MCOT Family was broadcast 12 hours daily, 12:00–24:00 (test of transmission). 25 May 2014 – Don't Know & Don't Know – Present: MCOT Family broadcasts 24/7. Don't Know – Don't Know : MCOT Family broadcasts 16 hours daily, 06:00–22:00 See also List of television stations in Thailand References External links Publicly funded broadcasters Television in Thailand Mass media companies of Thailand 1952 establishments in Thailand Organizations established in 1952 Mass media in Bangkok Television channels and stations established in 1977 State media Government-owned companies of Thailand