6DE7

6DE7 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $12.06 per tube.

Description

The 6DE7 is a dual triode in a 9-pin miniature type envelope with a small-button Noval 9-pin base. The bulb is a T6-1/2 type, with a diameter of 0.875 inches, a maximum overall length of 2 inches, and a maximum seated length of 0.750 to 0.875 inches. The tube has a heater voltage of 6.3 volts and a heater current of 0.875 amperes.

Applications

The 6DE7 is intended for use as a vertical-deflection oscillator and vertical-deflection amplifier in television receivers. Unit No.1 serves as the vertical-deflection oscillator, and Unit No.2 serves as the vertical-deflection amplifier. Ratings are provided for operation in 525-line, 30-frame and 525-line, 20-frame systems.

Ratings

For Unit No.1, the maximum DC plate voltage is 275 volts, the maximum peak positive-pulse plate voltage is 1500 volts, the maximum peak negative-pulse grid voltage is 250 volts, the maximum peak cathode current is 175 milliamperes, and the maximum average cathode current is 50 milliamperes. The maximum plate dissipation for Unit No.1 is 1.5 watts. For Unit No.2, the maximum plate dissipation is 7 watts. For both units, the maximum grid-circuit resistance for grid-resistor-bias or cathode-bias operation is 2.2 megohms. The maximum peak heater-cathode voltage is 200 volts, whether the heater is negative or positive with respect to the cathode.

Characteristics

For Unit No.1, the amplification factor is 10. At a plate voltage of 250 volts and a grid voltage of -11 volts, the plate current is 17.5 milliamperes. At a plate voltage of 250 volts, the plate resistance is 8750 ohms, the transconductance is 2000 micromhos, and the amplification factor is 5.5. The approximate grid voltage for a plate current of 10 microamperes is -20 volts, and for a plate current of 50 microamperes it is -44 volts.

For Unit No.2, at a plate voltage of 150 volts and a grid voltage of -17.5 volts, the plate current is 80 milliamperes. At a plate voltage of 150 volts, the plate resistance is 925 ohms, the transconductance is 6500 micromhos, and the amplification factor is 35. The approximate grid voltage for a plate current of 10 microamperes is -44 volts.

Base Connections

Pin 1 is the plate of Unit No.2, pin 2 is the grid of Unit No.2, pin 3 is the cathode of Unit No.2, and pins 4 and 5 are the heater connections.

Per-tube prices from completed sales, 2026-07-14 to 2026-09-21. Matched pairs and quads are divided out. See the price index for how these move over time.

Original manufacturer datasheets for 6DE7, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• EDK.