Anode Voltage (typical)Anode Voltage (typical)200V
Grid 1 Bias VoltageGrid 1 Bias Voltage-12.5V
Anode CurrentAnode Current90mA
Anode ResistanceAnode Resistance1,000Ω
TransconductanceTransconductance
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current1.2A
Notes
Bendix Type TE-52. Uses hard glass bulb (Nonex Glass T-11) with tungsten stem seal construction for higher temperature operation up to 300°C bulb temperature, compared to 225°C for the standard 6AR6.
Top cap (plate/anode) connection required — Cap, Small CI-1.
Intermediate (short) shell octal 6-pin base (glass filled mica). Pins 2 and 4 are not connected.
Designed primarily for pulse service with very high peak plate voltage ratings (up to 3000V DC, 1200V pulse test conditions). The peak plate current should not exceed the value shown in the pulse rating chart for the required duty factor.
The 6889 has significantly higher maximum plate voltage (3000V) than the standard 6AR6 (565V) and 6384 (750V), making it suitable for high-voltage pulse and regulator circuits where those types would fail.
Heater voltage regulation is critical — voltage should not fluctuate more than ±5% from the 6.3V center value. Both reliability and performance are directly related to heater voltage stability.
45-hour run-in under overload is performed on each tube during manufacture to eliminate tubes with minor defects. Tubes are also conditioned for high-voltage operation.
Cathode warm-up time is 45 seconds. Plate and heater voltage may be applied simultaneously.
Triode-strapped data sourced from the Tung-Sol 6AR6 manufacturer datasheet (https://frank.pocnet.net/sheets/127/6/6AR6.pdf), not from the Bendix 6889 datasheet. The 6889 datasheet provides triode characteristic curves (Chart 6) but no explicit numeric specifications for triode mode.
Interelectrode capacitances are from the Tung-Sol 6AR6 datasheet. The Bendix 6889 datasheet does not list capacitance values.