Created page with "thumb|300px|right|7788 TubeThe '''7788''' is a long life, shock and vibration resistant pentode with {{B9A base}}. It is used as the output tube in th..."
(Created page with "thumb|300px|right|7788 TubeThe '''7788''' is a long life, shock and vibration resistant pentode with {{B9A base}}. It is used as the output tube in th...")