I am looking for spec sheets or other data for an AEG 686h / Q450-4 tube. It is a power tetrode used in industrial applications. Any help would be appreciated. -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm