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Voltage Radio Detector Converter ·Octode

KK2

Directly heated battery octode for superheterodyne frequency conversion. Its multi-grid structure combines oscillator-assisted mixing with very high plate resistance, while the low-current filament minimizes consumption in portable receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
P35(37)
Socket code
-
Base pins
-
Nominal heater
2 V / 130 mA

Description

Directly heated battery octode for frequency-conversion service in low-filament-current receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
P35(37)
Socket code
-
Base pins
-
Nominal heater voltage
2 V
Nominal heater current
130 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

P35(37) - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Octode

X-ray radiationInterelectrode capacitances
Plate resistance
2500000 Ω
Transconductance
0.00027 S

Promoted only where a fixed schema field matched the source semantics; all other published operating, capacitance, CRT, converter, and output data are preserved in TUBE_SECTION_PARAMETER.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Octode

Other

  • Anode voltage

    135 V

    Converter;OperatingPoint1

  • Anode current

    0.7 mA

    Converter;OperatingPoint1

  • Control-grid voltage

    0 V

    Converter;OperatingPoint1

  • Screen-grid voltage

    135 V

    Converter;OperatingPoint1

  • Screen-grid current

    2.1 mA

    Converter;OperatingPoint1

  • Voltage on grids 3 and 5

    45 V

    Converter;OperatingPoint1

  • Grid-4 voltage

    -0.5 V

    Converter;OperatingPoint1

  • Grid-4 voltage

    -12 V

    Converter;Suppressed;OperatingPoint1

  • Anode voltage

    90 V

    Converter;OperatingPoint2

  • Anode current

    0.7 mA

    Converter;OperatingPoint2

  • Control-grid voltage

    0 V

    Converter;OperatingPoint2

  • Screen-grid voltage

    90 V

    Converter;OperatingPoint2

  • Screen-grid current

    1.3 mA

    Converter;OperatingPoint2

  • Voltage on grids 3 and 5

    45 V

    Converter;OperatingPoint2

  • Grid-4 voltage

    -0.5 V

    Converter;OperatingPoint2

  • Grid-4 voltage

    -12 V

    Converter;Suppressed;OperatingPoint2

  • Anode voltage

    135 V

    Converter;OscillatingCondition

  • Anode current

    1 mA

    Converter;OscillatingCondition

  • Control-grid voltage

    0 V

    Converter;OscillatingCondition

  • Screen-grid voltage

    135 V

    Converter;OscillatingCondition

  • Screen-grid current

    2.3 mA

    Converter;OscillatingCondition

  • Voltage on grids 3 and 5

    60 V

    Converter;OscillatingCondition

  • Grid-4 voltage

    -1.5 V

    Converter;OscillatingCondition

Characteristic

  • Mutual conductance

    270 µS

    Converter;OperatingPoint1

  • Internal resistance

    2500000 Ω

    Converter;OperatingPoint1

  • Anode current maximum in suppressed condition

    0.015 mA

    Converter;Grid4=-12V;OperatingPoint1

  • Mutual conductance maximum in suppressed condition

    2 µS

    Converter;Grid4=-12V;OperatingPoint1

  • Internal resistance minimum in suppressed condition

    10000000 Ω

    Converter;Grid4=-12V;OperatingPoint1

  • Mutual conductance

    270 µS

    Converter;OperatingPoint2

  • Internal resistance

    2000000 Ω

    Converter;OperatingPoint2

  • Anode current maximum in suppressed condition

    0.015 mA

    Converter;Grid4=-12V;OperatingPoint2

  • Mutual conductance maximum in suppressed condition

    2 µS

    Converter;Grid4=-12V;OperatingPoint2

  • Internal resistance minimum in suppressed condition

    10000000 Ω

    Converter;Grid4=-12V;OperatingPoint2

  • Mutual conductance

    270 µS

    Converter;OscillatingCondition

  • Internal resistance

    1700000 Ω

    Converter;OscillatingCondition

Capacitance

  • Grid-anode capacitance maximum

    0.07 pF

    Section1

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Octode

Characteristic

  • Chauffage: direct par batterie; vf

    2 V

  • alimentation en parallidle If

    130 mA

  • N bs 1 = +97" (

    44 A

Capacitance

  • Kapazititen Cel

    6.4 pF

  • Cg2

    8 pF

  • Cags <

    0.07 pF

  • Cglgd <

    0.2 pF

  • Cg2g4 <

    0.4 pF

Other

  • Va = 90

    1395 V

  • Vg2

    90 V

  • vg3+gh = 45

    45 V

  • va

    135 V

  • Vg2

    135 V

  • Vgitg5

    60 V

  • Se = 300

    3 pA

  • Wa = max

    0.5 W

  • vge = max

    135 V

  • Wge = max

    0.6 W

  • Vg3+gb = max

    100 V

  • wgl+g5s = max

    0.4 W

  • Ik = max

    10 mA

  • Vg (Ig4 [1]

    0.3 µA

  • Vg (Ig4 [2]

    0.2 V