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Voltage Tetrode ·Tetrode

36

Sharp-cutoff screen-grid tetrode intended primarily for RF voltage amplification, providing high gain with comparatively abrupt cutoff characteristics.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5E
Socket code
UX5
Base pins
5
Nominal heater
6.3 V / 300 mA

Description

36 is listed in the supplied receiving-tube handbook as a sharp-cutoff RF tetrode. The published heater/filament rating is 6.3 V at 0.3 A.

Socket description

Small 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5E
Socket code
UX5
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5E - 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

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
550000 Ω
Transconductance
0.00108 S
Amplification factor
595
Max plate voltage
180 V
Max screen voltage
90 V

Published ratings and characteristics promoted from the approved datasheet.

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

1932 Cunningham Radio Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Grid-plate capacitance

    0.01 pF

    Published direct interelectrode capacitance

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Maximum plate voltage

    250 V

    Published datasheet rating

  • Maximum screen voltage

    90 V

    Published datasheet rating

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    90 V

    ClassA

  • Control-grid bias

    3 V

    ClassA

  • Plate current

    3.2 mA

    ClassA

  • Screen current

    1.7 mA

    ClassA

  • Biased-detector plate supply

    250 V

    BiasedDetector

  • Biased-detector screen voltage

    90 V

    BiasedDetector

  • Biased-detector grid bias

    8 V

    BiasedDetector

  • Grid-leak detector plate supply

    135 V

    GridLeakDetector

  • Grid-leak resistance minimum

    2 MOhm

    GridLeakDetector

  • Grid-leak resistance maximum

    5 MOhm

    GridLeakDetector

Characteristic

  • Plate resistance

    550000 ohm

    Published datasheet characteristic

  • Transconductance

    1000 µS

    Published datasheet characteristic

  • Amplification factor

    595

    Published datasheet characteristic

  • Heater/filament voltage

    6.3 V

    Published heater/filament rating

  • Heater/filament current

    300 mA

    Published heater/filament rating

Capacitance

  • Input capacitance

    3.7 pF

    Published capacitance

  • Output capacitance

    9.2 pF

    Published capacitance

  • Grid-to-plate capacitance

    0.007 pF

    Published capacitance

Data set 03

193X Cunningham

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater/filament voltage

    6.3 V

    Published nominal

  • Heater/filament current

    300 mA

    Published nominal

  • Transconductance

    1100 uS

    Published characteristic

Data set 04

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    300 mA

    Published nominal value

  • Transconductance

    1080 µS

    Published representative/high operating value

  • Amplification factor

    595

    Published representative/high operating value

  • Plate resistance

    550000 ohm

    Published representative/high operating value

Capacitance

  • Grid-to-plate capacitance

    0.007 pF

    With shield can

Data set 05

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    300 mA

Data set 06

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    300 mA

Data set 07

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Maximum plate voltage

    250 V

    Published handbook rating

  • Maximum screen voltage

    90 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    90 V

    ClassA

  • Control-grid bias

    3 V

    ClassA

  • Plate current

    3.2 mA

    ClassA

  • Screen current

    1.7 mA

    ClassA

Characteristic

  • Plate resistance

    550000 ohm

    Published handbook characteristic

  • Transconductance

    1080 µS

    Published handbook characteristic

  • Heater/filament voltage

    6.3 V

    Published heater/filament rating

  • Heater/filament current

    300 mA

    Published heater/filament rating

Data set 08

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    90 V

    ClassA

  • Plate current

    7.5 mA

    ClassA

Characteristic

  • Plate resistance

    550000 ohm

    ClassA

  • Transconductance

    1080 uS

    ClassA

  • Amplification factor

    595

    ClassA