Voltage - Dual Triode (similar) ·Triode-Triode
Ruggedized medium-mu twin triode for voltage amplification, oscillator/mixer, multivibrator, and phase-inverter service, intended for severe-shock military and industrial airborne equipment.
Ruggedized medium-mu twin triode with electrically independent sections for voltage amplification, oscillator/mixer, multivibrator and phase-inverter service; intended for severe-shock military and industrial airborne equipment.
Small-button Noval 9-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 |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN22G1 | B | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN32K | B | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN4H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN5H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN61P | A | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN71G1 | A | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN81K | A | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
| PIN9HCT | — | HCT — Heater Center Tap EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 130, 9A |
2 physical sections, each with unique specifications.
Section 1
Published promoted fields populated semantically; identical repeated sections compressed.
Section 2
Second physical triode restored under current one-row-per-physical-section 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.
HeaterVoltageNominal
12.6 V
Nominal
HeaterCurrentNominal
175 mA
Nominal
Maximum Plate Voltage
330 V
Maximum Plate Dissipation
3 W
Maximum Cathode Current
20 mA
Transconductance
2200 µS
Typical
Amplification Factor
17
Typical
Plate Resistance
7700 ohm
Typical
Data set 02
Published operating points and test conditions from this source.
Plate Resistance
7700 ohm
EachSection
Transconductance
2200 uS
EachSection
Amplification Factor
17
EachSection
Data set 03
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heater current
350 mA
Plate voltage
100 V
ClassA
Grid voltage
0 V
ClassA;100VPlate
Plate current
11.8 mA
100VPlate
Plate voltage
250 V
ClassA
Grid voltage
-8.5 V
ClassA;250VPlate
Plate current
10.5 mA
250VPlate
Maximum plate voltage
330 V
Maximum plate dissipation
3 W
Maximum cathode current
22 mA
Amplification factor
19.5
100VPlate
Plate resistance
6250 ohm
100VPlate
Transconductance
3100 uS
100VPlate
Amplification factor
17
250VPlate
Plate resistance
7700 ohm
250VPlate
Transconductance
2200 uS
250VPlate
Grid-to-plate capacitance
1.5 pF
Section1
Grid-to-plate capacitance
1.5 pF
Section2
Input capacitance
1.6 pF
Section1
Input capacitance
1.6 pF
Section2
Output capacitance
0.5 pF
Section1
Output capacitance
0.35 pF
Section2