(!!!!!) (Best Overall Pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (13.5/13.2ma and 12.8/12.2ma) 1-5% matched (Highest mA and Gm)
$139.99
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1 pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 1 tube) 13.5ma Gm=5500 and 13.2ma Gm=7500 (triode/pentode) 1 tube) 12.8ma Gm=5400 and 12.2ma Gm=7000 (triode/pentode) Matched on Amplitrex Good Triode Ma/Gm=11-14ma Gm=4500-5000 Good Pentode Ma/Gm=8-10ma Gm=5500-6000 Recommended for - McIntosh MR67, MR71 FM Stereo tuner- Telefunken radio- Graaf GM 100 amplifier- HH Scott 350 Tuner 1961-2
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$119.99
$139.99
(+$20)