Haltron PCH200 television triode heptode
The PCH200 is a television triode heptode. The triode was designed as a pulse amplifier and the heptode section was designed for service as a noise gated sync. separator in color television receivers. The PCH200 replaces the ECH84. The thin glass tube envelope is 20 mm in diameter, and excluding the B10B base pins is 48 mm tall. The PCH200 was first introduced in 1964.