Condition: Out of Stock - Power pentode with high-mu triode specifically designed in 1961 for audio applications. The ECL86 is half a ECC83/12AX7 equivalent triode, and an EL84/6BQ5 equivalent pentode in one. Unfortunately no longer in production since the factory is closed. Limited stock available in original box. Recommended for: Aristaeus, Jag Electronics, Heathkit, Bölkow, Lafayette, Marshall, Audio Innovations, Eko, Blaupunkt.