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(!!!) (#1 6BL8 Pair - Best Overall Sound) ECF80=6BL8 Telefunken Germany <> bottom NOS 1961-1966

(!!!) (#1 6BL8 Pair - Best Overall Sound) ECF80=6BL8 Telefunken Germany <> bottom NOS 1961-1966

$ 119.99

1 pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1961-1966

tubes were factory sealed, 1 tube has smeared printing (on left)

1 tube) 12ma Gm=5200 and 11.6ma Gm=7000 (triode/pentode) 1961

1 tube) 13.2ma Gm=5500 and 11.0ma Gm=7300 (triode/pentode) 1966

Matched on Amplitrex

Good Triode Ma/Gm=12-14ma 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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