The CV2940 is a line output valve for television receivers. Sets with parallel heaters and thus mains transformers were for professional monitor use for TV and/or radar. Commercially the valve Type is the EL36.
The first EL36 was an audio output pentode from 1940. Next came the device referenced in the heading - this was for radar scanning and pulse modulation. Finally it became the TV valve, especially the PL36.
This exhibit is of modern design with a pressed glass foot and not an old style pinch. The 1940's EL36 audio output valve lacks the top cap of the EL36 television valve with the same Type designation.
The construction is as a beam tetrode with two inner grids and bright beam plates for suppression of secondary emission effects. The control grid has cooling fins on top of the supports.
The rectangular cathode and supports for the inner grids.
The wide glass tube envelope is 29 mm in diameter, and excluding the IO base pins is 93 mm tall.
