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6BF5

Beam-power pentode designed for television vertical-deflection amplifier service, including triode-connected operation in sweep-output circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7BZ
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 1.2 A

Description

Beam-power pentode designed for television vertical-deflection amplifier service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7BZ
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 1.2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7BZ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Pin 1	A	G1 — Control Grid	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN2Pin 2	A	G3 — Suppressor GridGroup BZ2	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN2Pin 2	A	K — CathodeGroup BZ2	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN3Pin 3	—	H — Heater	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN4Pin 4	—	H — Heater	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN5Pin 5	A	P — Plate (Anode)	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN6Pin 6	A	G2 — Screen Grid	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout
PIN7Pin 7	A	G1 — Control Grid	Verified Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 10000 Ω
Transconductance: 0.0075 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 5.5 W
Max screen dissipation: 1.25 W
Max cathode current: 40 mA
Rectifier max heater-cathode voltage: 200 V

Maximum plate dissipation is 5.5 W for Class A amplifier service; 5.0 W is separately published for vertical-deflection service.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Plate voltage
110 V
ClassA; OperatingPoint1
Screen voltage
110 V
ClassA; OperatingPoint1
Control-grid bias
7.5 V
ClassA; OperatingPoint1
Plate current
36 mA
ClassA; OperatingPoint1
Screen current
4 mA
ClassA; OperatingPoint1
Plate resistance
12000 ohm
ClassA; OperatingPoint1
Transconductance
7500 uS
ClassA; OperatingPoint1
Load resistance
2500 ohm
ClassA; OperatingPoint1
Plate voltage
225 V
VerticalDeflection; OperatingPoint2
Screen voltage
30 V
VerticalDeflection; OperatingPoint2
Control-grid bias
10 V
VerticalDeflection; OperatingPoint2
Load resistance
2500 ohm
VerticalDeflection; OperatingPoint2
Power output
6.7 W
VerticalDeflection; OperatingPoint2

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Power Output
5.5 W
ClassA1

Characteristic

Plate Resistance
12000 ohm
Typical

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

GRID #
0.65 µµf
Capacitances | GRID #1 TO PLATE: (G1 TO P) 0.65 µµf

Other

HEATER VOLTAGE
6.3 V
Maximum Ratings | HEATER VOLTAGE 6.3 VOLTS
MAXIMUM PLATE DISSIPATION
5.5 W
Maximum Ratings | MAXIMUM PLATE DISSIPATION 5.5 WATTS
HEATER VOLTAGE
6.3 V
Typical Operating Conditions | HEATER VOLTAGE 6.3 VOLTS
HEATER CURRENT L
2 A
Typical Operating Conditions | HEATER CURRENT L 2 AMP.
PEAK AF GRID #
5 V
Typical Operating Conditions | PEAK AF GRID #1 VOLTAGE ~.5 VOLTS
ZERO—SIGNAL PLATE CURRENT
36 mA
Typical Operating Conditions | ZERO—SIGNAL PLATE CURRENT 36 MA.
MAXIMUM SIGNAL PLATE CURRENT
39 mA
Typical Operating Conditions | MAXIMUM SIGNAL PLATE CURRENT 39 MA.
ZERO—SIGNAL GRID #
4 mA
Typical Operating Conditions | ZERO—SIGNAL GRID #2 CURRENT 4 MA.
M AX FMUM SIGNAL GRID #
10.5 mA
Typical Operating Conditions | M AX FMUM SIGNAL GRID #2 CURRENT 10.5 MA.
MAXIMUM SIGNAL POWER OUTPUT L
9 W
Typical Operating Conditions | MAXIMUM SIGNAL POWER OUTPUT L.9 WATTS

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Peak Positive Pulse Plate Voltage
700 V
PlateDissipationVerticalDeflection
5 W
Heater Cathode Voltage
100 V
Grid1CircuitResistanceFixedBias
0.1 Mohm
Grid1CircuitResistanceCathodeBias
0.5 Mohm
Grid1CircuitResistanceCathodeBias820OhmMinimum
2.2 Mohm
Plate Voltage
110 V
ClassA
Screen Voltage
110 V
ClassA
Grid1 Voltage
-7.5 V
ClassA
Peak AF Grid1 Voltage
7.5 V
ClassA
Zero Signal Plate Current
49 mA
ClassA
Maximum Signal Plate Current
50 mA
ClassA
Zero Signal Screen Current
4 mA
ClassA
Maximum Signal Screen Current
8.5 mA
ClassA
Load Resistance
2500 ohm
ClassA
Total Harmonic Distortion
9 %
ClassA
Power Output
0.9 W
ClassA

Characteristic

Plate Voltage
225 V
TriodeConnection; VerticalDeflection
Cathode Bias Resistance
1200 ohm
TriodeConnection; VerticalDeflection
GridInputSawtoothPeakToPeak
40 V
TriodeConnection; VerticalDeflection
GridInputNegativePeaking
56 V
TriodeConnection; VerticalDeflection
Amplification Factor
6.7
TriodeConnection; VerticalDeflection
Transconductance
4200 uS
TriodeConnection; VerticalDeflection
Plate Current
20 mA
TriodeConnection; VerticalDeflection
PeakPositivePulsePlateOutputVoltage
500 V
TriodeConnection; VerticalDeflection
SawtoothPlateOutputPeakToPeak
140 V
TriodeConnection; VerticalDeflection
Deflection Angle
53 deg
TriodeConnection; VerticalDeflection