The 807 is a classic RF beam tetrode made by many companies. This is the Mullard version and unlike other 807's the lower screen is a box rather than the usual elliptical shape.The parameters given are for single ended use. When used in a class AB1 as a push pull pair with 600 Volts on the anode an output power of 65 Watts was normal.
The anode has extra ceramic insulators for the high voltages that occur in transmitter service.
The box screens top and bottom.The classic envelope is 50 mm in diameter, and excluding the UX5 base pins is 131 mm tall.References: Data-sheet & 1040. Type 807 was first introduced in 1938. See also 1938 adverts. |
