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7247 GE rebranded National 1960's

7247 GE rebranded National 1960's

$ 24.99

1 tube) 7247 GE rebranded National 1960's

12AX7 Section = 1.1ma Gm=1500

12AU7 Section = 8.2ma Gm=1800

strong single

Tested on Amplitrex

12AX7 Section Good = 1-1.2ma Gm=1600-1800

12AU7 Section Good = 8-10ma Gm=1800-2200

 

 

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