This is a Mullard QY4-250, a high-power transmitting tetrode vacuum tube primarily used in radio frequency (RF) applications like transmitters and linear amplifiers. Plate Dissipation: Typically rated for 250 watts.
This is a Mullard QY4-250, a high-power transmitting tetrode vacuum tube primarily used in radio frequency (RF) applications like transmitters and linear amplifiers. Plate Dissipation: Typically rated for 250 watts.