The 6BV8 is a double diode triode with each section having a separate cathode. The design use was as a synchronous detector and chrominance amplifier in colour television receivers. It is also suited to the application in sound receivers of FM demodulation and first AF amplifier.
The RCA logo and the three separate valve sections. The triode is on the left. Each diode has a maximum current rating of 23 mA.
A face view of the triode section showing the copper grid supports.
The triode is on the right. Note the bus bars that the three heaters connect to in parallel.
The thin glass tube envelope is 21 mm in diameter, and excluding the B9A base pins is 48 mm tall.
Reference: Data-sheet. Type 6BV8 was first introduced in 1955.