Alternatives & variations Download PDF datasheet

6F6GTG

Power-amplifier pentode intended for receiver output stages, with single-ended Class-A and push-pull Class-A/AB operating conditions. This GTG variant retains the fundamental 6F6 audio power function.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 700 mA

Description

The 6F6GTG is a pentode power amplifier intended for receiver power-output stages, with published single-ended Class A and push-pull Class A/AB operating conditions.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 700 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 80000 Ω
Transconductance: 0.0025 S
Max plate voltage: 375 V
Max screen voltage: 285 V
Max plate dissipation: 11 W
Max screen dissipation: 3.75 W

Promoted small-signal values use 250 V pentode Class A1 condition; triode-connected operation preserved as parameters.

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

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate_voltage
250 V
ClassA,OneTube
Screen_voltage
250 V
ClassA,OneTube
Control_grid_voltage
-16.5 V
ClassA,OneTube
Load_resistance
7000 ohm
ClassA,OneTube
Power_output
3.2 W
ClassA,OneTube
Total_harmonic_distortion
8 percent
ClassA,OneTube
Plate_voltage
375 V
PushPull,TwoTubes,ClassAB
Screen_voltage
250 V
PushPull,TwoTubes,ClassAB
Power_output
18.5 W
PushPull,TwoTubes,ClassAB
Effective_load_resistance_plate_to_plate
10000 ohm
PushPull,TwoTubes,ClassAB

Characteristic

Zero_signal_plate_current
34 mA
ClassA,OneTube
Zero_signal_screen_current
6.5 mA
ClassA,OneTube