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6760

Power/output pentode designed for audio, broadband, telephone, industrial, or general power-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7CH
Socket code: B7G
Base pins: 7
Nominal heater: 18 V / 350 mA

Description

The 6760 is a long-life miniature power-amplifier pentode intended for telephone equipment and industrial applications, especially broadband amplifier output stages, with reliable operation under vibration.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7CH
Socket code: B7G
Base pins: 7
Nominal heater voltage: 18 V
Nominal heater current: 350 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7CH - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN2G5	A	G5 — Fifth GridGroup 7CH2 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN2K	A	K — CathodeGroup 7CH2 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN3H	—	H — Heater Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN4H	—	H — Heater Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN5P	A	P — Plate (Anode) Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN6G2	A	G2 — Screen GridGroup 7CH6 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN6G4	A	G4 — Fourth GridGroup 7CH6 Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH
PIN7G3	A	G3 — Suppressor Grid Chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CH

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.012 S
Max plate voltage: 300 V
Max screen voltage: 200 V
Max plate dissipation: 10 W
Max screen dissipation: 1.5 W
Max cathode current: 100 mA

Published ratings and characteristics audited; additional numerical data retained in TUBE_SECTION_PARAMETER.

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

Pentode

Other

Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
100 V
Published handbook rating
Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid bias
1.5 V
ClassA
Plate current
2.6 mA
ClassA
Screen current
7.5 mA
ClassA
Oscillator grid current
0.5 mA
Converter Oscillator
Oscillator grid resistor
20000 ohm
Converter Oscillator

Characteristic

Plate resistance
1000000 ohm
Published handbook characteristic
Transconductance
475 µS
Published handbook characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
300 mA
Published heater/filament rating

Data set 02

1960 Ericsson

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

POWER AMPLIFIER PENTODES { [1]
6760 W
POWER AMPLIFIER PENTODES { 6760 AND 6761 ;
POWER AMPLIFIER PENTODES { [2]
6761 W
POWER AMPLIFIER PENTODES { 6760 AND 6761 ;
Except for heater ratings the [1]
6760
Except for heater ratings the 6760 is identical with the 6761.
Except for heater ratings the [2]
6761
Except for heater ratings the 6760 is identical with the 6761.
Pin No [1]
1
Pin No 1 - Plate Pin No 6 - Plate
Pin No [2]
6
Pin No 1 - Plate Pin No 6 - Plate
Pin No [1]
2
Pin No 2 - Grid No 1 Pin No 7 - Grid No 2
Pin No [2]
1
Pin No 2 - Grid No 1 Pin No 7 - Grid No 2
Pin No [3]
7
Pin No 2 - Grid No 1 Pin No 7 - Grid No 2
Pin No [4]
2
Pin No 2 - Grid No 1 Pin No 7 - Grid No 2
Pin No [1]
3
Pin No 3 - Cathode and Grid No 3 Pin No 8 - Cathode and Grid No 3
Pin No [2]
3
Pin No 3 - Cathode and Grid No 3 Pin No 8 - Cathode and Grid No 3
Pin No [3]
8
Pin No 3 - Cathode and Grid No 3 Pin No 8 - Cathode and Grid No 3
Pin No [4]
3
Pin No 3 - Cathode and Grid No 3 Pin No 8 - Cathode and Grid No 3
Pin No [1]
4
Pin No 4 - Heater Pin No 9 - No Connection
Pin No [2]
9
Pin No 4 - Heater Pin No 9 - No Connection
Pin No
5
Pin No 5 -~ Heater
Grid No [1]
1
Grid No 1 to Plates 81 CO P o ¢ o 0 o 5 ¢ o o L] . 0.4 uuf
Grid No [2]
81
Grid No 1 to Plates 81 CO P o ¢ o 0 o 5 ¢ o o L] . 0.4 uuf
Grid No [3]
0
Grid No 1 to Plates 81 CO P o ¢ o 0 o 5 ¢ o o L] . 0.4 uuf
Grid No [4]
5
Grid No 1 to Plates 81 CO P o ¢ o 0 o 5 ¢ o o L] . 0.4 uuf
Grid No [5]
0.4
Grid No 1 to Plates 81 CO P o ¢ o 0 o 5 ¢ o o L] . 0.4 uuf
Input:s g1 to h + k + g2 + g3 * L]
11
Input:s g1 to h + k + g2 + g3 * L] 11’ uu?®
Outputs p to h + k¥ + g2 + g3 N
5
Outputs p to h + k¥ + g2 + g3 N 5 uupP
Grid No [1]
2 V
Grid No 2 Voltage . . . 200 volts
Grid No [2]
200 V
Grid No 2 Voltage . . . 200 volts
Plate Diassipation
10
Plate Diassipation . . . . 10 wvatts
Grid No [1]
2 W
Grid No 2 Dissipation ., 1.5 watts
Grid No [2]
1.5 W
Grid No 2 Dissipation ., 1.5 watts
Cathode Current
100 mA
Cathode Current . . . . . 100 milliamps
Heater = Cathode Voltage
100 V
Heater = Cathode Voltage . 100 volts
Heater Voltage . « o s o s e s @ [1]
18 V
Heater Voltage . « o s o s e s @ 18.0 6.3 volts
Heater Voltage . « o s o s e s @ [2]
6.3 V
Heater Voltage . « o s o s e s @ 18.0 6.3 volts
Heater Current . . « . . « e e st e s s [1]
350 mA
Heater Current . . « . . « e e st e s s 0.35 1.0 anps
Heater Current . . « . . « e e st e s s [2]
1 A
Heater Current . . « . . « e e st e s s 0.35 1.0 anps
Plate Voltage « . « « « o s s s e s » [1]
130 V
Plate Voltage « . « « « o s s s e s » 130 130 volts
Plate Voltage « . « « « o s s s e s » [2]
130 V
Plate Voltage « . « « « o s s s e s » 130 130 volts
Grid No [1]
2 V
Grid No 2 Voltage . . . e ¢ s 4 o s+ s 130 130 volts
Grid No [2]
4 V
Grid No 2 Voltage . . . e ¢ s 4 o s+ s 130 130 volts
Grid No [3]
130 V
Grid No 2 Voltage . . . e ¢ s 4 o s+ s 130 130 volts
Grid No [4]
130 V
Grid No 2 Voltage . . . e ¢ s 4 o s+ s 130 130 volts
Cathode Bias Resistor . *« = [1]
2 ohm
Cathode Bias Resistor . *« = 2 8 & & s @ 100 100 ohms
Cathode Bias Resistor . *« = [2]
8 ohm
Cathode Bias Resistor . *« = 2 8 & & s @ 100 100 ohms
Cathode Bias Resistor . *« = [3]
100 ohm
Cathode Bias Resistor . *« = 2 8 & & s @ 100 100 ohms
Cathode Bias Resistor . *« = [4]
100 ohm
Cathode Bias Resistor . *« = 2 8 & & s @ 100 100 ohms
Plate Current , . . . . e s e e s e = e [1]
70 A
Plate Current , . . . . e s e e s e = e 70 70 milliamwps
Plate Current , . . . . e s e e s e = e [2]
70 A
Plate Current , . . . . e s e e s e = e 70 70 milliamwps
Grid No [1]
2 mA
Grid No 2 Current . . . e * v s s e s @ 345 35 milliamps
Grid No [2]
345 mA
Grid No 2 Current . . . e * v s s e s @ 345 35 milliamps
Grid No [3]
35 mA
Grid No 2 Current . . . e * v s s e s @ 345 35 milliamps
Transconductance . «e s
4 A/V
Transconductance . «e s 4 o s s e o
Grid No [1]
1 V
Grid No 1 Voltage approx. for Ib = 10 ulA ~25 =25 volts
Grid No [2]
10 V
Grid No 1 Voltage approx. for Ib = 10 ulA ~25 =25 volts
Grid No [3]
25 V
Grid No 1 Voltage approx. for Ib = 10 ulA ~25 =25 volts
Grid No [4]
25 V
Grid No 1 Voltage approx. for Ib = 10 ulA ~25 =25 volts
Load Resistor . . ¢« « » * L] L] L4 » L L] L) [1]
2000 ohm
Load Resistor . . ¢« « » * L] L] L4 » L L] L) 2000 2000 ohms
Load Resistor . . ¢« « » * L] L] L4 » L L] L) [2]
2000 ohm
Load Resistor . . ¢« « » * L] L] L4 » L L] L) 2000 2000 ohms
Power Output at [1]
10 W
Power Output at 10 % Digtortion . . . . 3-0 2.0 watts
Power Output at [2]
3 W
Power Output at 10 % Digtortion . . . . 3-0 2.0 watts
Power Output at [3]
0 W
Power Output at 10 % Digtortion . . . . 3-0 2.0 watts
Power Output at [4]
2 W
Power Output at 10 % Digtortion . . . . 3-0 2.0 watts