(!!!) (Best used single) 12AT7 Telefunken Diamond Bottom used/good 1960's (10.0ma/10.8ma)

1 low noise tube) 12AT7 Telefunken Germany <> Diamond Bottom used/good 1960's in white box, some stains on glass from usage

Amplitrex Test Data:

1 section) 10.0ma Gm=5200

1 section) 10.8ma Gm=5600

Good Ma range 8-10ma

Good Gm range 4500-5500

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