6U8A

High-fidelity miniature 9-pin triode-pentode specifically engineered for exceptionally low hum, minimal leakage noise, and very low microphonics in low-level audio stages. Equivalents: There are no direct drop-in pin-compatible equivalents. Real-Life Examples: Dynaco ST-70 stereo amplifier, Ampeg Reverberocket guitar amplifier, Gibson Falcon guitar amplifier reverb circuit. [1, 2, 3, 4]