4 International 6U8A/6KD8 VHF Radio/Television Mixer Oscillator Audio Vacuum Tube Valve- Bangybang.tubeBrand International Model 6U8A Type Triode pentode by designation but is constructed as a beam tetrode Use Vf 6. 3 Volts If 0. 45 Ampere Indirect Parallel series AC DC Used in VHF radio and television between 80 MHz to 220 MHz. Bands II and III. The valve would be used as a mixer with the triode as local oscillator Similar Equiv 6KD8 Condition New in Box (NOS) Tubes per listing 4 06UXXX