ECF80=6BL8 Telefunken Germany <> bottom like new 1971

triode section) 11.6ma Gm=5000 (strong)

pentode section) 9.6ma Gm=6100 (strong)

Recommended for

- McIntosh MR67, MR71 FM Stereo tuner
- Telefunken radio
- Graaf GM 100 amplifier
- HH Scott 350 Tuner 1961-2