6P14P

6P14P has no equivalent designation confirmed by the archive. Completed sales put the typical price at $14.25 per tube.

General Description

The 6P14P is an output pentode designed for low-frequency power amplification. It is miniature, housed in a glass bulb with a nine-pin base, and has an indirectly heated oxide-coated cathode.

Ratings and Characteristics

The tube is rated for a heater voltage of 6.3 V, with a permissible range of 5.7 V to 7 V. The interelectrode capacitances are 11 pF between the first grid and cathode, 7 pF between anode and cathode, and 0.2 pF between the first grid and anode. The transconductance is 11.3 -2.3 mA/V, and the anode impedance is 30 kΩ.

Maximum ratings include an anode dissipation of 14 W, a second grid dissipation of 2.2 W, a cathode current of 65 mA, and a voltage between cathode and heater of 100 V. The maximum second grid voltage is 300 V. The maximum anode voltage is 400 V when anode dissipation is up to 8 W, and 300 V when anode dissipation exceeds 8 W. The maximum first grid resistance is 1 MΩ for fixed bias, or 0.3 MΩ for self-bias. With fixed bias, the first grid circuit resistance may be increased to 1 MΩ provided anode and second grid dissipation are no more than 75% of rated value.

For rated conditions, the anode and second grid voltages are both 250 V, with a cathode resistor of 120 Ω for self-bias. Under these conditions, anode current is 48 ± 8 mA, second grid current is 5 +2 mA, and cathode power dissipation is 4.2 -1.2 W. Under dynamic conditions at a cathode power of 4 W, the second grid current is less than 11 mA and the distortion factor kf is 8 +2%. The datasheet also gives operating conditions at an effective first grid voltage of 3.4 V and an anode load of 5.2 kΩ.

Environmental and Mechanical Limits

The 6P14P operates at ambient temperatures from -60 to +70 °C and is resistant to relative humidity of 95 to 98% at +40 °C. It withstands vibration loads up to 2.5 g and multiple impact loads up to 35 g. The maximum bulb temperature is 220 °C. The maximum weight is 20 g, and the guaranteed service life is 3000 hours.

Per-tube prices from completed sales, 2025-07-03 to 2026-10-17. Matched pairs and quads are divided out. See the price index for how these move over time.

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• 6P14P