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Old 06-08-2007, 12:58 AM
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jpdylon jpdylon is offline
<-- sucker for old sets.
 
Join Date: Apr 2005
Location: Knox County, Tennessee
Posts: 1,675
it has a shield to prevent detuning to surrounding electromagnetic interference.

plain and simple it keeps things stable by preventing the tube from picking up unwanted noise.

Glad you found the problem.
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