(!!!) (Best Single) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (Premium 6BL8 SUB) (Highest mA and Gm)
$54.99
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E80CF=7643 Amperex Germany PQ NOS made by Valvo Hamburg Germany 1961 (Triode/Pentode) 12.4ma Gm=5000 (triode) 14.2ma Gm=7300 (pentode) Good Triode section Ma and Gm = 12-13ma Gm= 4500-5000 Good Pentode section Ma and Gm = 9-11ma Gm = 6000-6500 (The E80CF is a "SPECIAL QUALITY" medium-mu triode/pentode. Specs are similar to 6BL8=ECF80) - McIntosh MR-67 tuner
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