6GV8

6GV8 is also designated ECL85.

The 6GV8 is a miniature tube containing a triode unit and a pentode unit, intended for sync-amplifier and video-output applications in television receivers. It requires a miniature 9-contact socket.

Ratings

The 6GV8 has a heater voltage of 6.3 volts and a heater current of 0.9 amperes. The peak heater-cathode voltage is ±200 volts maximum. The maximum bulb temperature is 240 °C at the hottest point.

Both the triode and pentode units have a maximum plate supply voltage of 550 volts. The triode unit has a maximum DC plate voltage of 250 volts. The pentode unit has a maximum peak plate voltage of 2000 volts. The maximum DC plate supply voltage is 770 volts, with a maximum peak positive-pulse plate voltage of 6500 volts and a maximum peak negative-pulse plate voltage of 1500 volts. The maximum DC grid-No.1 voltage is 55 volts, and the maximum peak negative-pulse grid-No.1 voltage is 330 volts. The maximum peak cathode current is 550 mA, and the maximum average cathode current is 175 mA. Maximum plate dissipation is 17.5 watts. The pentode unit has a maximum grid-No.2 supply voltage of 550 volts, a maximum grid-No.2 voltage of 250 volts, a maximum DC grid-No.2 voltage of 220 volts, and a maximum grid-No.2 input of 3.5 watts. The maximum grid-No.1-circuit resistance is 1 megohm for grid-resistor-bias operation.

The Mazda Belvu datasheet gives alternative maximum ratings for the 6GV8. It specifies a maximum voltage between filament and cathode of 100 volts and a maximum resistance of the circuit between filament and cathode of 1 megohm. For the triode unit, it gives a maximum anode voltage at zero current of 550 volts, a maximum continuous anode voltage of 250 volts, a maximum anode dissipation of 0.5 watts, and a maximum average cathode current of 15 mA. The maximum peak cathode current for the triode unit is 200 mA with a maximum pulse duration of 400 microseconds, or 100 mA with a maximum pulse duration of 800 microseconds. The maximum grid circuit resistance is 1 megohm with fixed bias and 3.3 megohms with automatic bias.

Characteristics

For the triode unit, the mu-factor from grid No.2 to grid No.1 is 4.4 at a plate voltage of 150 volts and a grid-No.1 voltage of -22.5 volts. For the pentode unit, at a plate voltage of 250 volts, a grid-No.2 voltage of 150 volts, and a grid-No.1 voltage of -22.5 volts, the plate resistance is approximately 15000 ohms and the transconductance is 7100 µmhos. The Mazda Belvu datasheet states that for a new average tube, the peak anode current is 200 mA at an anode voltage of 50 volts, a grid-No.2 voltage of 170 volts, and a grid-No.1 voltage of -1 volt.

Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.

Original manufacturer datasheets for 6GV8, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• Horizontal-Deflection Amplifier
• MAZDA BELVU (filed under ECL85)