6D22S

Electron tube 6D22S (6Д22С rus.) is a power diode for use as a half-wave B+ rectifier in high-quality audio amplifiers. Originally intended for color TV damper-diode service, the 6D22S is similar to the 6DL3 except for base connections and some ratings. The 6D22S features very slow warmup (30 seconds typical), making it an excellent, rugged power-on delay device for audio amplifiers. Warm-up time is longer than that of common rectifier tubes (such as the 5AR4/GZ34), it is lower in cost than electronic delay relays. Heater may be operated from the same supply as other tubes in amplifier, up to Vb=600V. High pulse current capability gives sound quality which issuperior to commonly-used rectifier tubes.

Equivalent to tube: EY500

Technical specifications: (at Ua = 50V, f = 16 ± 4kHz, t imp. = 6..8μs) 

• Heating voltage: 6.3V
• Heating current: 1.9A ± 0.15A
• Anode current in pulse: more 800mA
• Cathode-heater capacitance: less 5pF
• Anode-cathode capacitance: less 12.5pF

Maximum technical parameters:

• Heat voltage: 5.7V – 6.9V
• Reverse voltage in pulse, at t ≤15 μs: 6kV
• Voltage between cathode and heater, at positive heater potential: 100V
  – at negative heater potential: 900 V
  – the same in pulse: 6.5 kV
• Rectified current (average value): 300mA
• Anode current in pulse: 1A
• Power dissipated by anode: 8W
• Horizontal scanning frequency: not less than 12kHz
• Temperature of tube bulb: 210 °C
• Range of operating ambient temperatures: -60…+70 °C

Operating time not less than 1500 hours.