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

triode section) 11.7ma Gm=5200

pentode section) 9ma Gm=5900

Recommended for

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