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(!!!!!) (Best Pair 1961) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (10.2/10.8ma and 10.4/10ma) (PREMIUM 6BL8 SUB) (Tuners)

(!!!!!) (Best Pair 1961) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (10.2/10.8ma and 10.4/10ma) (PREMIUM 6BL8 SUB) (Tuners)

$ 99.99

1 matched pair) E80CF=7643 Amperex Germany PQ NOS made by Valvo Hamburg Germany 1961 in white boxes (Triode/Pentode) 

1 tube) 10.2ma Gm=4500 and 10.4ma Gm=6400

1 tube) 10.8ma Gm=4800 and 10.0ma Gm=6100

 

Good Triode section Ma and Gm = 11-13ma Gm= 4500-5000

Good Pentode section Ma and Gm = 9-11ma Gm = 6000-6500

 

7643=E80CF is a "SPECIAL QUALITY" low noise medium-mu triode/pentode

Specs are similar to 6BL8=ECF80

 

- McIntosh MR-67 tuner

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