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All prices are per tube$39.99
The 6414 is 1/2 inch taller than a standard 12AT7 and is a useful great sounding sub for a 12at7, 5965, or a 7062. These are Triple Mica, grey plate construction with D-getters. They were mistakenly branded 12AT7 by the National/Richardson company. Highly recommended for Singlepower Extreme headphone amplifier.