 In 1968, KSAN was acquired by Metromedia and renamed KNEW, then donated to KQED in 1970, which operated it as a secondary PBS channel under the call letters KQEC.The station changed hands again in 1988, becoming a foreign language station known as KMTP-TV.In 1972, with the completion of the Sutro Tower, KPIX, KGO, KRON, KQED, and KTVU all moved their transmitters to the new tower.