Sensibly equivalent¶ to:
7EK7 B349 PCC805
The 30L15 is a low impedance high gain double triode. The low voltage high current suggests a low noise design, used in the front end stages in a television tuner.
The other 30L15 in the museum has a different construction. This one has a perforated outer screen as well as an inter-section screening plate.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 47 mm tall.
References: Data-sheet & 1040. Type 30L15 was first introduced in 1960.
Absolute Maximum Operating Conditions¶
Updated November 06, 2016. shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:300ma pins:9 pin:1.k pin:2.g1s pin:3.a pin:4.h pin:5.h pin:6.g1 pin:7.kin pin:8.kout pin:9.a