Voltage Pentode - Remote Cutoff (single) ·Pentode
Variable-mu high-frequency pentode for RF and IF amplification with automatic gain control.
Variable-mu high-frequency pentode for RF and IF amplification with automatic gain control.
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
Published ratings/characteristics promoted from the approved source.
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
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Transconductance
6000 µS
Typical
Data set 02
Published operating points and test conditions from this source.
Heater Voltage
6.3 V
Heater Current
300 mA
CutoffCharacteristic
Variable mu
Data set 03
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Transconductance
5000 µS
RForIFAmplifier
Plate resistance
340000 ohm
RForIFAmplifier
Plate voltage
250 V
RForIFAmplifier
Screen voltage
120 V
RForIFAmplifier
Plate current
7.5 mA
RForIFAmplifier
Screen current
2.5 mA
RForIFAmplifier
Maximum plate voltage
180 V
Published limit
Maximum plate dissipation
1.7 W
Published limit
Maximum screen voltage
140 V
Published limit
Data set 04
Published operating points and test conditions from this source.
h,
300 mA
Published in approved EF85 target datasheet entry; Section1
Ci n
7.2 pF
Published in approved EF85 target datasheet entry; Section1
Cuu t
3.7 pF
Published in approved EF85 target datasheet entry; Section1
Ca -eg I <
0.007 pF
Published in approved EF85 target datasheet entry; Section1
Cg l - l1 <
0.15 pF
Published in approved EF85 target datasheet entry; Section1
la 11.8 9.2 9.6
10 mA
Published in approved EF85 target datasheet entry; Section1
gm 6.0 5.7 5.8
6 mA
Published in approved EF85 target datasheet entry; Section1
Itotal 15 23.5 20.5
18.5 mA
Published in approved EF85 target datasheet entry; Section1
I" 10.7 11.3
11.7 mA
Published in approved EF85 target datasheet entry; Section1
Ig2 2.5 2.7
2.8 mA
Published in approved EF85 target datasheet entry; Section1
gm 6.0 6.2
6 mA
Published in approved EF85 target datasheet entry; Section1
Itotal 17. 5 16 .5
16 mA
Published in approved EF85 target datasheet entry; Section1
V g
2 mA
Published in approved EF85 target datasheet entry; Section1
P g 2 max
650 mW
Published in approved EF85 target datasheet entry; Section1
Ik max
15 mA
Published in approved EF85 target datasheet entry; Section1
la
10 mA
Published in approved EF85 target datasheet entry; Section1
Ig2
2.5 mA
Published in approved EF85 target datasheet entry; Section1
gm
6 mA
Published in approved EF85 target datasheet entry; Section1
Data set 05
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
250 V
Maximum Screen Voltage
250 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.5 W
Maximum Cathode Current
15 mA
Transconductance
6000 µS
Typical
Plate Resistance
1000000 ohm
Typical
Data set 06
Published operating points and test conditions from this source.
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.65 W
Maximum Cathode Current
15 mA
Transconductance
6000 µS
Typical
Plate Resistance
1000000 ohm
Typical
Data set 07
Published operating points and test conditions from this source.
Heater Voltage Vh
63 V
Heater Current Ih
3 A
Maximum Anode Dissipation Pa(max)
25 W
Maximum Screen Grid Dissipation pg2(max)
65 W
Maximum Anode Voltage Va(max)
300 V
Maximum Screen Grid Voltage Vg2(max)
300 V
Maximum Cathode Current Ik(max)
15 mA
Grid 1 to Heater cg1_h <
15 pF
Grid to Earth c; 5
72 pF
Anode to Earth coot
37 pF
Grid 1 to Anode cg1.a <
7 pF
Anode Voltage Va 250
250 V
Screen Grid Voltage Vg2 100
250 V
Control Grid Voltage Vg1 —
2 V
Anode Current la
10 mA
Screen Grid Current Ig2
25 mA
Mutual Conductance gm
6 mA
60 µA/V Vgi
-35 V
(Va=250V, Vg3=OV, Vh=
6.3 V
iiiiiiiiiiiiiiiiiiiiiiliiiiiiiiiliiiiii iiiills"i~
1 a
(Va 250V, Vg3=OV, Vh
6.3 V
Data set 08
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heating
Heater current
300 mA
Heating
Maximum plate voltage
300 V
Promoted published datasheet value
Maximum screen voltage
250 V
Promoted published datasheet value
Maximum plate dissipation
2.5 W
Promoted published datasheet value
Anode to grid No.1 Cag1 .. max
0.007 pF
Limiting values
Grid No.1 to heater Cglf max
0.15 pF
Limiting values
Anode voltage Va, max
530 V
Limiting values
A max
250 V
Limiting values
Anode dissipation Wa max
2.5 W
Limiting values
Grid No.2 voltage Vgzo max
550 V
Limiting values
Vg2 max
250 V
Limiting values
Grid No.2 dissipation Wgz max
0.65 W
Limiting values
Cathode current I max
15 mA
Limiting values
Heater to cathode voltage Vit max
150 V
Limiting values
Plate resistance
600000 Ω
Promoted published datasheet value
Transconductance
6000 µS
Promoted published datasheet value
Amplification factor
26
Promoted published datasheet value
Anode and supply voltage Va=Vp
250 v
Published datasheet value
Grid No.1 voltage Vgl ~2 =
35 v
Published datasheet value
Y, =250
-300 V
Published datasheet value
Vo3 =
0 V
Published datasheet value
E Vs =
250 V
Published datasheet value