Vacuum Tube - 6KD6, Beam Power Amplifier
New-Old-Stock (NOS) tube.
The 6KD6 is a compactron beam-power pentode primarily designed for use as the horizontal-deflection amplifier in color television receivers. It is characterized by having a very low knee with a very high peak current of over an ampere. This results in a basic capability to scan 90 degree large screen color picture tubes at 25 kV from 280 volt power supplies. Its low knee minimizes "snivets" without the necessity of supply special voltages to the beam plates.