Voltage Pentode ·Pentode
Low-noise frame-grid pentode developed for UHF and broadband professional amplification, combining very high transconductance with low capacitances.
Low-noise frame-grid RF pentode for ultrahigh-frequency and broadband service, with high transconductance and low capacitances.
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.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Promoted fields mapped from printed maximum-rating and characteristic headings; additional published values preserved in parameter rows.
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.
Grid To Plate Capacitance
0.04 pF
Maximum;WithShield
Input Capacitance
7.8 pF
WithShield
Output Capacitance
3.4 pF
WithShield
Transconductance
15000 uS
Typical
Data set 02
Published operating points and test conditions from this source.
Grid-to-plate capacitance
0.05 pF
ColdTube;Maximum
Input capacitance
7 pF
ColdTube;WithoutExternalShield
Output capacitance
2.5 pF
ColdTube;WithoutExternalShield
Plate supply voltage
150 V
ClassA
Screen-grid supply voltage
150 V
ClassA
Cathode bias resistor
110 Ohm
ClassA
Plate current
13.5 mA
ClassA
Screen-grid current
4 mA
ClassA
Transconductance minimum
10000 uS
Transconductance maximum
16000 uS
Plate current maximum
18 mA
Screen-grid current maximum
6 mA
Transconductance
13000 uS
ClassA
Plate resistance
0.2 MOhm
ClassA
Equivalent noise resistance
500 Ohm
ClassA
Input conductance at 100 MHz
2000 uS
ClassA
Data set 03
Published operating points and test conditions from this source.
Maximum plate voltage
- to 200 V
Maximum screen voltage
- to 165 V
Maximum plate dissipation
- to 3.3 W
Maximum screen dissipation
- to 0.85 W
Maximum cathode current
- to 40 mA
Transconductance
12500 µS
Plate supply voltage
150 V
ClassA
Plate supply voltage
160 V
ClassA
Grid No.2 supply voltage
150 V
ClassA
Grid No.2 supply voltage
160 V
ClassA
Cathode resistor
110 Ω
ClassA
Cathode resistor
600 Ω
ClassA
Transconductance
12500 µS
ClassA
Plate current
13 mA
ClassA
Grid No.2 current
4.5 mA
ClassA
Data set 04
Published operating points and test conditions from this source.
Screen-Grid Dissipation
0.75 watt
Screen-Grid Dissipation 0.75 watt
Heater Current
300 amperes
Heater Current 300 mi I I i amperes
Screen-Grid Current U
5 amperes
Screen-Grid Current U.5 U.5 mII 1i amperes
Data set 05
Published operating points and test conditions from this source.
Plate Voltage Maximum
180 V
Design-center value
Screen-Grid Voltage Maximum
150 V
Design-center value
Plate Dissipation Maximum
3 W
Design-center value
Screen-Grid Dissipation Maximum
0.75 W
Design-center value
Cathode Current Maximum
35 mA
Design-center value
Heater-Cathode Voltage Maximum
50 V
Design-center value
Grid Resistance Maximum
0.1 megohm
Design-center value
Bulb Temperature Maximum
120 degC
Design-center value
Heater Voltage
6.3 V
A-C or D-C
Heater Current
300 mA
General characteristics
Plate Supply Voltage
150 V
Operating column 1
Screen-Grid Supply Voltage
150 V
Operating column 1
Control Grid Voltage
0 V
Operating column 1
Cathode Resistor
110 ohm
Operating column 1
Plate Supply Voltage
160 V
Operating column 2; minimized gain variation
Screen-Grid Supply Voltage
160 V
Operating column 2; minimized gain variation
Control Grid Voltage
8.5 V
Operating column 2 as printed
Cathode Resistor
600 ohm
Operating column 2
Grid-to-Plate Capacitance Maximum
0.5 pF
Without external shield
Input Capacitance
7 pF
Without external shield
Output Capacitance
2.5 pF
Without external shield
Grid-to-Plate Capacitance Maximum
0.4 pF
With external shield RMA #315
Input Capacitance
7.1 pF
With external shield RMA #315
Output Capacitance
2.9 pF
With external shield RMA #315
Plate Current
13 mA
Operating column 1
Screen-Grid Current
4.5 mA
Operating column 1
Transconductance
12500 uS
Operating column 1
Plate Current
13 mA
Operating column 2
Screen-Grid Current
4.5 mA
Operating column 2
Transconductance
12500 uS
Operating column 2