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[[File:Tube 7788.jpeg|thumb|300px|right|7788 Tube]] | [[File:Tube 7788.jpeg|thumb|300px|right|7788 Tube]] | ||
The '''7788''' (European equivalent '''E810F''') is a long life, shock and vibration resistant pentode with {{B9A base}}. | The '''7788''' (European equivalent '''E810F''', Russian 6Ж52П similar) is a long life, shock and vibration resistant pentode with {{B9A base}}. | ||
It is used as the output tube in the vertical power amplifier of [[585A]]. | It is used as the output tube in the vertical power amplifier of [[585A]]. |