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6Y6GT

Beam-power pentode designed primarily as an audio-frequency power amplifier, particularly useful where the available supply voltage is comparatively low.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7AC
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 1.25 A

Description

The 6Y6-GT is a beam-power pentode primarily intended as an audio-frequency power amplifier and particularly useful where the available supply voltage is relatively low.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7AC
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 1.25 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7AC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Pin 1	—	NC	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN2Pin 2	—	H — Heater	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN3Pin 3	A	P — Plate (Anode)	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN4Pin 4	A	G2 — Screen Grid	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN5Pin 5	A	G1 — Control Grid	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN7Pin 7	—	H — Heater	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN8Pin 8	A	BP — Beam-Forming PlateGroup AC8	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN8Pin 8	A	K — CathodeGroup AC8	Verified 12L6GT/25L6GT manufacturer basing, 7AC

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 18300 Ω
Transconductance: 0.0071 S
Max plate voltage: 200 V
Max screen voltage: 135 V
Max plate dissipation: 12.5 W
Max screen dissipation: 1.75 W

Promoted characteristics use the 200-V Class-A column; 135-V alternative preserved as parameter data.

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

Capacitance

Input capacitance
15 pF
Output capacitance
11 pF
Grid-to-plate capacitance
0.7 pF

Other

Plate voltage
200 V
ClassA
Screen-grid voltage
135 V
ClassA
Grid voltage
-14 V
ClassA
Load resistance
2600 ohm
ClassA
Power output
6 W
ClassA

Characteristic

Plate resistance
18300 ohm
ClassA
Transconductance
4100 uS
ClassA

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

Plate Resistance
9300 ohm
ClassA;Ep=135V
Transconductance
7000 uS
ClassA;Ep=135V

Other

Power Output
3.6 W
ClassA;Ep=135V
Power Output
6 W
ClassA;Ep=200V