Voltage Pentode ·Pentode
Classic low-noise, low-microphony pentode for microphone, phono, and high-quality audio preamplifier voltage amplification.
Low-noise pentode for audio-frequency voltage amplification and high-quality preamplifier service.
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 ratings and characteristics are taken from the printed target-tube entry in the approved PDF.
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
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
1 W
Transconductance
2200 µS
Typical
Data set 02
Published operating points and test conditions from this source.
Plate Voltage
250 V
Screen Voltage
140 V
Plate Current
3 mA
Screen Current
0.6 mA
Control Grid Voltage
-2 V
Transconductance
2000 uS
Equivalent Input Noise Voltage
2 uV
Bandwidth=25-10000Hz
Maximum Grid Resistance
3000000 ohm
PlateDissipation>0.2W
Data set 03
Published operating points and test conditions from this source.
Plate voltage
250 V
VoltageAmplifier
Screen voltage
140 V
VoltageAmplifier
Grid voltage
-2 V
VoltageAmplifier
Plate current
3 mA
VoltageAmplifier
Screen current
0.6 mA
VoltageAmplifier
Plate resistance
2500000 ohm
Transconductance
2000 µS
Data set 04
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
1 W
Transconductance
2200 µS
Typical
Data set 05
Published operating points and test conditions from this source.
Heater Voltage
6.3 V
Heater Current
200 mA
NoiseVoltageTypical
3 uV
AudioAmplifier
Application
Tape recorder and microphone preamplifier
LowNoise
Data set 06
Published operating points and test conditions from this source.
Plate voltage
250 V
AudioPreamplifier
Screen voltage
140 V
AudioPreamplifier
Control-grid voltage
-2 V
AudioPreamplifier
Plate current
3 mA
AudioPreamplifier
Screen current
0.6 mA
AudioPreamplifier
Plate resistance
2.5 MΩ
Section1
Transconductance
2000 µS
Section1
Data set 07
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published heater rating
Heater current
200 mA
Published heater rating
Transconductance
2000 µS
AFAmplifier
Plate resistance
2500000 ohm
AFAmplifier
Plate voltage
250 V
AFAmplifier
Screen voltage
140 V
AFAmplifier
Plate current
3 mA
AFAmplifier
Data set 08
Published operating points and test conditions from this source.
III
200 mA
Published in approved EF86 target datasheet entry; Section1
j: V""' measured w it h Vi" =
100 mV
Published in approved EF86 target datasheet entry; Section1
P. z max
200 mW
Published in approved EF86 target datasheet entry; Section1
I k max
6 mA
Published in approved EF86 target datasheet entry; Section1
R. 1 - k max. (p"
200 mW
Published in approved EF86 target datasheet entry; Section1
( o ut
5.1 pF
Published in approved EF86 target datasheet entry; Section1
C ~l - h <
0.0025 pF
Published in approved EF86 target datasheet entry; Section1
Data set 09
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
1 W
Maximum Screen Dissipation
0.4 W
Maximum Cathode Current
10 mA
Data set 10
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
200 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
1 W
Maximum Screen Dissipation
0.2 W
Maximum Cathode Current
10 mA
Transconductance
2200 µS
Typical
Data set 11
Published operating points and test conditions from this source.
Heater Voltage Vh
6.3 V
Heater Current Ih
200 mA
pa >
200 mW
Pa <
200 mW
Input Cin
38 pF
Output Cout
5.1 pF
Anode to Grid 1 Ca.gi <
5 pF
Data set 12
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published nominal/basic-parameter heater condition.
Heater current
200 mA
Published heater current.
Plate current
3 mA
Published basic-parameter operating point.
Screen current
0.6 mA
Published basic-parameter operating point.
Transconductance
2000 µS
Published basic-parameter value; normalized to µS.
Plate resistance
2500000 Ω
Published internal/plate resistance.
Amplification factor
38
Published amplification factor.
Maximum plate voltage
300 V
Published limiting operating value.
Data set 13
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heating
Heater current
200 mA
Heating
Maximum plate voltage
300 V
Promoted published datasheet value
Maximum screen voltage
300 V
Promoted published datasheet value
Plate resistance
2500000 Ω
Promoted published datasheet value
Transconductance
2200 µS
Promoted published datasheet value
Amplification factor
38
Promoted published datasheet value
Data set 14
Published operating points and test conditions from this source.
Heater Current (typical)
200 mA
SourcePage1-2
Cathode-to-heater potential ±
100 V
SourcePage1-2
DC plate voltage Vp
300 V
SourcePage1-2
Screen grid voltage Vg2
200 V
SourcePage1-2
Plate dissipation
1 W
SourcePage1-2
Screen grid dissipation
0.2 W
SourcePage1-2
Cathode current
6 mA
SourcePage1-2
DC plate Voltage 250
250 V
TypicalOperation
Data set 15
Published operating points and test conditions from this source.
Input Capacitance
4 pF
Output Capacitance
5.5 pF
TransferCapacitance
0.05 pF