ECF80=6BL8 Telefunken NOS 1971 original box, tube was factory sealed

triode section) 12.5ma Gm=5300

pentode section) 10ma Gm=6800

Recommended for

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