The 403A aka 6AK5 is a sharp cut-off VHF pentode. The heater is 6.3-V. at 150 mA. 2 NOS Western Electric 403A. Hickok TV-7D/U tests read 34 and 38. Vacuum Tubes.
The 403A aka 6AK5 is a sharp cut-off VHF pentode. The heater is 6.3-V. at 150 mA. 2 NOS Western Electric 403A. Hickok TV-7D/U tests read 34 and 38. Vacuum Tubes.