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(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (.8/1.2mA Gm=1400/1600)

(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (.8/1.2mA Gm=1400/1600)

By Tube World

$ 109.99

1 low noise tube) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (163-B4J3=1964) in white box - copper grid posts

1 section) Gm=1400 (0.8ma)

1 section) Gm=1600 (1.2ma) 

 

Good used Gm range = 1300-1600

Good used Ma range 0.7 - 0.9ma

  • Tested on Amplitrex  

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