Power - Triode ·Triode-Triode
Double power triode used chiefly for Class-B output service in AC receivers; its sections may also be paralleled as a Class-A driver or operated separately as voltage amplifiers.
Double triode used chiefly as a Class-B power tube in AC receivers; its two triodes can also be paralleled as a Class-A driver or used separately as voltage amplifiers.
Small 5-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1H | — | H — Heater EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN22P | B | P — Plate (Anode) EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN32G1 | B | G1 — Control Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN4K | A | K — Cathode EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN51G1 | A | G1 — Control Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN61P | A | P — Plate (Anode) EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| PIN7H | — | H — Heater EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
| CAP1G4 | A | G4 — Fourth Grid EIA transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7B |
2 physical sections, each with unique specifications.
Section 1
Published promoted fields populated from the datasheet; identical repeated sections compressed where applicable.
Section 2
Identical second physical Triode section; duplicated from representative section per physical-section-row policy.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Plate voltage
300 V
ClassB;PushPull;TwoTubes
Control-grid voltage
0 V
ClassB;PushPull;TwoTubes
Load resistance plate-to-plate
10000 Ω
ClassB;PushPull;TwoTubes
Power output
10 W
ClassB;PushPull;TwoTubes
Plate voltage
294 V
ClassA;ParallelSections
Transconductance
3200 µS
ClassA;ParallelSections
Amplification factor
35
ClassA;ParallelSections
Data set 02
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
800 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Cathode Current
60 mA
Transconductance
2600 µS
Typical
Amplification Factor
35
Typical
Data set 03
Published operating points and test conditions from this source.
Plate Resistance
11000 ohm
Transconductance
3400 µS
Amplification Factor
35
Maximum Plate Voltage
300 V
Class B Power Output
10 W
Data set 04
Published operating points and test conditions from this source.
Maximum plate voltage
300 V
Published handbook rating
Plate voltage
300 V
ClassA
Control-grid bias
0 V
ClassA
Plate current
35 mA
ClassA
Load resistance
8000 ohm
ClassA
Power output
10.5 W
ClassA
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
800 mA
Published heater/filament rating
Data set 05
Published operating points and test conditions from this source.
Maximum Peak Plate Current Per Plate
125 mA
ClassA1
Power Output
10 W
ClassB;TwoTubes