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[TowerTalk] AL-811 with Svetlana 572B's

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Subject: [TowerTalk] AL-811 with Svetlana 572B's
From: "Drax Felton" <>
Date: Tue, 24 Aug 2010 16:19:57 -0400
List-post: <">>
Does anyone have instructions on what needs to be done to replace the 811A
tubes in an Ameritron AL-811 amplifier when Svetlana 572B tubes?


I've seen on the Internet where it mentioned the Svetlana brand wasn't a
direct drop in replacement for the 811A tube.


My amp seems to have high input SWR now that I dropped in the Svetlana's and
seems to develop a lot of power, 500 watts, at only 10-15 watts drive.




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