Siam Broadcasting Company was registered in June 1990. Thai Sky TV launched test signals on 26 August 1991. These became regular in September 1991. TSTV used
MMDS to deliver its signals, similar to
IBC, its competitor. Under this system, TSTV carried three channels. At the time, the installation fee for TSTV was higher than that of IBC: TSTV charged 1000 baht per subscription while IBC charged only 600. The companies moved to the
Thaicom satellite in 1994. Negotiations were held in March of the same year to form a possible joint with Star TV, with the likely outcome of using TSTV's satellite as Star's inroad for Thailand. Parent company Wattachai was restructuring TSTV in order to be more competitive with IBC. As of 1995, the company was owned by Wattachak plc. TSTV and UBC on 5 April 1995 signed contracts with Shinawatra Satellite, owned by
Thaksin Shinawatra. TSTV shut down in August 1997 as an effect of the
1997 Asian financial crisis. The company was unable to find a satellite to continue providing its service. Its former signals were reused by a new company, World Star, in 2001, which planned a 12-channel digital service, yet initially restricted to three analog channels. ==Channels==