File:Sylvania-tube.jpg

{{Information

| Description = {{en|1=Sylvanis type 6AT6 vacuum tube. Sylvania was a major manufacturer of vacuum tubes until the early 1980s.}}

| Date =

| Source = {{Own}}

| Author = Rehrenberg (talk)

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{{PD-self|date=August 2008}}

{{Copy to Wikimedia Commons|bot=Fbot|priority=true|date=March 2012}}