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In Reply to: RE: Rolling tube 6dz4 to 6af4 caused problem in 10B posted by kolbay@t-online.hu on April 06, 2008 at 00:15:20
The 6DZ4 and 6AF4 are so simular I am surprised you are having an issue. Is the 6DZ4 used to point of being weak and the 6AF4 a new tube? What happens if the AFC is turned off with 6AF4 in place?
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