The CV201 is a directly heated aligned grid beam tetrode. The prototype was the V630.
The anode dissipation is 7.5 Watts.
The low filament voltage suggests a lead acid battery as the heating power source and thus a use in portable equipment. The data-sheet mentions intermittent pulse service - probably a CW transmitter.
Side view of the anode. The internal structure is hidden.
The filament tension springs are at the top. The control grid notches cab just be seen on the right support top and again near the base. Within the anode there is another metal sheet, this will be the beam plate with a rectangular hole for the electron stream.
Close-up of the filament tension springs. The springs connect to a split plate and it looks as if there are two single coated wires running through the grids. The top plate connects the wires together.
The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 97 mm tall.
