(!!!) (slightly microphonic) ECC81=12AT7 Miniwatt by Mullard NOS 1970 (9.6/10.6ma)

1 slightly microphonic low noise tube) ECC81=12AT7 Miniwatt by Mullard NOS 1970 in white box made in Blackburn plant, UK

1 section) 9.6ma Gm=5000

1 section) 10.6ma Gm=5500

• Tested on Amplitrex AT1000
  
• Low Noise and slightly microphonic when tapped 
• Good Ma range 8-10ma
  
• Good Gm range 5000-5500

(Sweet and Smooth 12AT7) 

(rich midrange, lots of harmonic structure, good bass)

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