Beam Power Pentode
The KT66 / 7581A / 7581 Vacuum tube is a glass octal type used in AF power amplifier applications. It is used
in the output stage of audio amplifying equipment, especially units designed to have ample
reserve of power-delivering ability. The KT66 / 7581A tube should be adequately ventilated.
It requires an octal socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.9 A