Sensibly equivalent¶ to:
The CV133 triode was specified as both an amplifier and an RF power valve and in commercial form is a 6C4. In the latter role it would deliver 5.5 Watts. With a very small envelope volume, this would make it ideal for hand portable equipment. In larger apparatus it could deliver enough drive power for much larger PA's.
The anode is a flattened cylinder that is treated to produce a better radiating surface.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 45 mm tall.
References: Datasheet & 1040.
Absolute Maximum Operating Conditions¶
Updated October 02, 2013. shape:thin.glass.tube construction:all.glass type:triode age:1940.1950 base:b7g heater:6.3v pins:7 pin:1.a pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g1 pin:7.k