Vacuum Tube - 6AS7G / 6520, Dual Triode
New-Old-Stock (NOS) tube.
The 6AS7G is a glass type twin triode designed especially for service as a power amplifier. The low-mu and high plate current rating of the tube adapt it particularly well to booster operation in the scanning circuit of television receivers. It may be used as a regulator tube in direct-current power supplies.