Summary

Tetrode type 235. The internal workings are sectioned to display the variable pitch winding of the control grid. The variable pitch winding of the grid produces the remote cut-off or variable mu characteristic.
2.5 volt indirectly heated cathode.
Manufacturer: Cable Radio Tube Corp., 230 North Ninth Street, Brooklyn, NY, USA.

Physical Description

Valve without bulb on five pin UY style base with top cap, mounted on display block with ST 21579. The internal workings are sectioned to display the variable pitch winding of the control grid.

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