Vacuum Tube - 6SC7, Triode, Dual, HI-MU
New-Old-Stock (NOS) tube.
Also known by US military identifier VT-105.
The 6SC7 is a high-mu twin triode designed primarily for use as an AF voltage amplifier. Featuring a special shielding arrangement to reduce hum, the tube is well suited for low-level audio amplifier service.