6BE8

Miniature medium-mu triode and sharp-cutoff pentode designed specifically as a VHF oscillator-mixer frequency changer.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

Miniature medium-mu triode and sharp-cutoff pentode intended for use as a VHF oscillator-mixer.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5000 Ω
Transconductance: 0.008 S
Amplification factor: 40
Max plate voltage: 300 V
Max plate dissipation: 2.5 W

Sylvania 6BE8 medium-mu triode oscillator section of physically dissimilar triode/sharp-cutoff pentode VHF oscillator-mixer converter. Triode manufacturer design-center maximum plate voltage 300 V, plate dissipation 2.5 W. Typical Class A operating conditions anode 150 V, cathode resistor 56 Ω, plate current 18 mA, mu 40, transconductance 8000 µmhos (0.008 S), approximate plate resistance 0.005 MΩ (5000 Ω). Pentode suppressor-grid No.3 and internal shield are internally tied to this triode cathode. Shared heater 6.3 V 450 mA; approximate triode direct interelectrode capacitances already flagged present. Typical values are not maximum ratings.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 400000 Ω
Transconductance: 0.0052 S
Max plate voltage: 300 V
Max plate dissipation: 2.8 W
Max screen dissipation: 0.5 W

Sylvania 6BE8 sharp-cutoff pentode mixer section of dual triode-pentode VHF oscillator-mixer. Manufacturer design-center maximum pentode plate voltage 300 V, plate dissipation 2.8 W, grid-2 screen dissipation 0.5 W. Grid-2 supply maximum 300 V, but actual screen voltage is conditional on rating chart, so no unconditional max_screen_voltage promoted. Typical Class A: plate 250 V, screen 110 V, cathode resistor 68 Ω, plate current 10 mA, screen about 3.5 mA, transconductance 5200 µmhos (0.0052 S), approximate plate resistance 0.4 MΩ (400000 Ω). Grid No.3 and internal shield tied to separate triode cathode. Manufacturer 9EG basing and published section/coupling capacitances; original capacitance flag true retained.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

Heater Voltage (AC or DC) . 47 6.3 Volts
6.3 V
Heater Voltage (AC or DC) . 47 6.3 Volts
Heater Current . 600 450 Ma
450 mA
Heater Current . 600 450 Ma
Plate Voltage . . . . . . . . . . . . . . . . . . . . . 150 250 Volts
250 V
Plate Voltage . . . . . . . . . . . . . . . . . . . . . 150 250 Volts
Grid No. 2 Voltage . . . . . . . . . . . . . . . . . .. 110 Volts
110 V
Grid No. 2 Voltage . . . . . . . . . . . . . . . . . .. 110 Volts
Grid No. 1 Voltage . . . . . . . . . . . . . . . . . .. 0 0 Volts
0 V
Grid No. 1 Voltage . . . . . . . . . . . . . . . . . .. 0 0 Volts
Plate Resistance (approx.) . . . . . . . . . . . . . . . . . 005 0.4 Megohm
0.4 Megohm
Plate Resistance (approx.) . . . . . . . . . . . . . . . . . 005 0.4 Megohm
Transconductance . . . . . . . . . . . . . . . . . . . . 800 5200 umhos
5200 umhos
Transconductance . . . . . . . . . . . . . . . . . . . . 800 5200 umhos
Plate Current . . . . . . . . . . . . . . .. L. 18 10 Ma
10 mA
Plate Current . . . . . . . . . . . . . . .. L. 18 10 Ma
Grid No. 2 Current . . . . . . . . . . . . . ... 35 Ma
35 mA
Grid No. 2 Current . . . . . . . . . . . . . ... 35 Ma
Grid No. 1 Voltage (approx.) forly =10pa . . . . . . . . . . =12 -10 Volts
-10 V
Grid No. 1 Voltage (approx.) forly =10pa . . . . . . . . . . =12 -10 Volts
circuit depend upon the rated heater voltage and current of the tube under test. For this type: E =
18.8 V
circuit depend upon the rated heater voltage and current of the tube under test. For this type: E = 18.8 Volts,

Other

Plate Voltage . . 300 300 Volts Max. PRODUCTS INC.
300 V
Plate Voltage . . 300 300 Volts Max. PRODUCTS INC.
Grid No. 2 Supply Voltage 300 Volts Max.
300 V
Grid No. 2 Supply Voltage 300 Volts Max.
Grid No. 2 Voltage . See Rating Chart RADIO TUBE DIVISION
2 V
Grid No. 2 Voltage . See Rating Chart RADIO TUBE DIVISION
Plate Dissipation . . . 2.5 2.8 Watts Max. EMPORIUM, PA.
2.8 W
Plate Dissipation . . . 2.5 2.8 Watts Max. EMPORIUM, PA.
Grid No. 2 Dissipation . . 0.5 Watt Max.
0.5 W
Grid No. 2 Dissipation . . 0.5 Watt Max.
Positive Grid No. 1 Voltage 0 0 Volts Max. Prepared and Released By The
0 V
Positive Grid No. 1 Voltage 0 0 Volts Max. Prepared and Released By The