Voltage - Dual Triode (similar) ·Triode-Triode
Dual triode documented across Mullard, Philips, Amperex, Siemens, AEG, and GE literature, providing two triode sections for general electronic amplification where its published characteristics are suitable.
Mullard dualtriode with published ratings and characteristics extracted from the supplied datasheet.
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) Original EIA label 2P; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN22K | B | K — Cathode Original EIA label 2K; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN32G1 | B | G1 — Control Grid Original EIA label 2G1; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN4H | — | H — Heater Original EIA label H; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN5H | — | H — Heater Original EIA label H; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN61P | A | P — Plate (Anode) Original EIA label 1P; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN71K | A | K — Cathode Original EIA label 1K; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN81G1 | A | G1 — Control Grid Original EIA label 1G1; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
| PIN9HCT | — | HCT — Heater Center Tap Original EIA label HCT; manufacturer corroboration pending | Unverified EIA Base Connections, printed page 131, 9CZ |
2 physical sections, each with unique specifications.
Section 1
Representative electrical section.
Section 2
Second identical physical triode section; added to align rows with SectionCount.
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.
Typical anode voltage
250 V
ComputerService
Typical anode current per system
14.5 mA
ComputerService
Insulation resistance
100 MOhm
Data set 02
Published operating points and test conditions from this source.
Application
Industrial long-life amplifier
Data set 03
Published operating points and test conditions from this source.
Input capacitance
3 pF
EachSection
Output capacitance
0.6 pF
EachSection
Grid-to-plate capacitance
5 pF
EachSection
Plate voltage
250 V
ClassA;EachSection
Cathode resistor
620 Ω
ClassA;EachSection
Plate current
14.5 mA
ClassA;EachSection
Plate voltage
100 V
FrequencyHalver;EachSection
Plate voltage
200 V
FrequencyHalver;EachSection
Control-grid voltage
-11 V
FrequencyHalver;EachSection
Plate current
1 mA
FrequencyHalver;EachSection
Plate resistance
3850 Ω
EachSection
Transconductance
5200 µS
EachSection
Amplification factor
20
EachSection
Data set 04
Published operating points and test conditions from this source.
Plate voltage
250 V
Cathode resistor
620 ohm
Plate current
14.5 mA
Transconductance
5200 uS
Amplification factor
20
Data set 05
Published operating points and test conditions from this source.
HeaterOrFilamentVoltage
12.6 V
HeaterOrFilamentCurrent
300 mA
Plate Voltage
250 V
Plate Current
14.5 mA
Transconductance
5200 uS
Plate Resistance
3850 ohm
Amplification Factor
20
Data set 06
Published operating points and test conditions from this source.
Grid-to-plate capacitance
5.2 pF
EachSection
Plate capacitance
0.6 pF
EachSection
Grid capacitance
3.4 pF
EachSection
Plate supply voltage
250 V
EachSection
Cathode resistor
620 Ω
EachSection
Plate current
14.5 mA
EachSection
Plate voltage
120 V
EachSection
Control-grid voltage
-2 V
EachSection
Plate current
21 mA
EachSection
Peak cathode current maximum
350 mA
Pulse;EachSection
Application
Computer and switching service with prolonged cutoff operation
Section1
Transconductance
5200 µS
EachSection
Amplification factor
20
EachSection
Data set 07
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Vf = 6.3 12.6 V
Heater current
600 mA
If = 600 300 mA
Plate voltage
100 V
Vf = 6.3 V Va =100 V
Heater voltage
6.3 V
Vf = 6.3 V Va =100 V
Heater current
600 mA
If = 600 570-630 mA. Ig = 200 µA
Plate voltage
120 V
Ca = 0.6 0.4-0.8 pP Va = 120 V
Plate capacitance
0.6 pF
Ca = 0.6 0.4-0.8 pP Va = 120 V
Grid capacitance
3.4 pF
Cg = 3.4 2.9-3.9 pP Vg = -2 V
Cathode-heater capacitance
3.5 pF
Ckf = 3.5 pP Ia = 21 14-28 10 mA
Plate current
21 mA
Ckf = 3.5 pP Ia = 21 14-28 10 mA
Plate voltage
200 V
Ca' = 0.5 0.35-0.65 pP Va = 200 V
Plate voltage
120 V
Caa' . 0.9 <1.2 pP Va =120 V
Plate supply voltage
250 V
Vba = 250 V Rg =0.1 MSS
Cathode resistor
620 ohm
Rk = 620 S2 -I g = < 0.2 1 µA E--
Transconductance
2 mA/V
Rk = 620 S2 -I g = < 0.2 1 µA E--
Plate current
14.5 mA
Ia = 14.5 mA
Cathode-heater voltage
1 V
S •.= 5.2 3.9-6.5 mA/V Vkf 1 ) = 200 V
Amplification factor
20
µ 20 R 2) = 1 MS
Heater voltage
6.3 V
Vf = 6.3 V
Plate supply voltage
150 V
Vba = 150 V
Cathode resistor
90 ohm
Rk = 90Q
Load resistance
3900 kohm
Ra = 3900
Transconductance
1 mA/V
6) With S = 1 %. Timp = max. 10 µsec
Data set 08
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heater current
600 mA
Transconductance
5200 µS
Nominal/Bogey
Amplification factor
20
Nominal/Bogey
Data set 09
Published operating points and test conditions from this source.
Anode-grid capacitance
5 pF
Interelectrode
Anode capacitance
0.6 pF
Interelectrode
Grid capacitance
3.4 pF
Interelectrode