The classic 807 beam tetrode valve is unusual in still being designated as current production in the 1960s and having a five pin base. The 807 was normally run hard and different makes of 807 held up better than others.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.![](../pics/abb0002a.jpg)
The anode side view.![](../pics/abb0002b.jpg)
The UX5 base. The base shell is plastic not ceramic suggesting commercial ground based applications. For airborne or tropical use the base would be ceramic.![](../pics/abb0002c.jpg)
The lower screen and the base of the electrodes.The classic envelope is 51 mm in diameter, and excluding the UX5 base pins is 124 mm tall.References: Data-sheet & 1040. Type 807 was first introduced in 1938. See also 1938 adverts. |