(!!) (Best Pair #2) ECC81=12AT7 Philips by Mullard and Mullard UK NOS 1965-1970 (10.5/12ma and 11.2/10.6ma) (sweet sound)

1 low noise pair) ECC81=12AT7 Philips by Mullard and Mullard UK NOS 1965-1970

1 tube) 10.5/12ma Gm=5300 and 5900 – Philips Import by Mullard 1970

1 tube) 11.2/10.6ma Gm=5600 and 5500 – Mullard 1965

• Tested on Amplitrex AT1000
  
• Low Noise and not microphonic
• Good Ma range 8-10ma
  
• Good Gm range 5000-5500

(Sweet and Smooth 12AT7)