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please help? [message #9993] Wed, 12 September 2007 15:46 Go to previous message
Gilipsie is currently offline  Gilipsie
Messages: 77
Registered: May 2009
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My friend just bought a quad of Alpha branded E84L tubes to test. They seem fine tested as a 6BQ5 but gave him a loud hum in his guitar amp as soon as they came up. Any idea why?

 
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