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Voltage Dual Tetrode ·Tetrode-Tetrode

QQE025

Internally neutralized double tetrode designed for RF amplification, oscillation, and frequency multiplication.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

Internally neutralized double tetrode for RF amplifier, oscillator and frequency-multiplier service.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.0105 S
Amplification factor
31
Max plate voltage
250 V
Max screen voltage
200 V

Identical repeated sections compressed to one row. Internally neutralized double tetrode for RF amplifier, oscillator and frequency-multiplier service.

Section 2

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.0105 S
Amplification factor
31
Max plate voltage
250 V
Max screen voltage
200 V

Second physical RF tetrode section; added to align rows with SectionCount.

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

1963 Philips Electron Tubes Handbook V4

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • Cathode: oxyde Vf

    12.6 V

    | Cathode: oxyde Vf = 6.3 12.6 V 1 )

  • Katode : Oxyd

    300 mA

    | Katode : Oxyd 0.6 0.3 A

  • should not exceed

    7 V

    Cooling | should not exceed 7 V or 14 V and the accumulator may be

  • should not exceed

    14 V

    Cooling | should not exceed 7 V or 14 V and the accumulator may be

  • actuel ne surpassera pas

    7 V

    Cooling | actuel ne surpassera pas 7 V ou 14 V et 1'accumulateur

  • actuel ne surpassera pas

    14 V

    Cooling | actuel ne surpassera pas 7 V ou 14 V et 1'accumulateur

  • maniere que Vf

    5.7 V

    Cooling | maniere que Vf = 5.7 V ou 11.4 V

  • maniere que Vf

    11.4 V

    Cooling | maniere que Vf = 5.7 V ou 11.4 V

  • Eine voribergehende Abweichung von Vf von

    1 s

    Cooling | Eine voribergehende Abweichung von Vf von 10 % 1st zu-

Capacitance

  • Plate capacitance

    1.6 pF

    Capacitances | Ca = 1.6 pF Co = 0.95 pF

  • Plate capacitance

    0.95 pF

    Capacitances | Ca = 1.6 pF Co = 0.95 pF

  • Control-grid capacitance

    6.4 pF

    Capacitances | Cg1 = 6.4 pF C1 = 3.8 pF

  • Control-grid capacitance

    3.8 pF

    Capacitances | Cg1 = 6.4 pF C1 = 3.8 pF

  • Grid-to-plate capacitance

    0.16 pF

    Capacitances | Cag1 = 0.16 pF

Other

  • Typical characteristics per system Va

    150 V

    Typical characteristics | Typical characteristics per system Va = 150 V

  • Kenndaten pro System Vg

    150 V

    Typical characteristics | Kenndaten pro System Vg2 = 150 V

  • Plate current

    25 mA

    Typical characteristics | Ia = 25 mA

  • Transconductance

    10.5 mA/V

    Typical characteristics | S = 10.5 mA/V

  • f = max

    500 ma

    Maximum ratings | f = max. 500 max. 500 Mc/s

  • f = max

    500 MHz

    Maximum ratings | f = max. 500 max. 500 Mc/s

  • Plate voltage

    250 ma

    Maximum ratings | Va = max. 250 max. 250 V

  • Plate voltage

    250 V

    Maximum ratings | Va = max. 250 max. 250 V

  • Wia = max

    6 ma

    Maximum ratings | Wia = max. 2x6 max. 2x7 W

  • Wia = max

    7 W

    Maximum ratings | Wia = max. 2x6 max. 2x7 W

  • Wa = max

    3 ma

    Maximum ratings | Wa = max. 2x3 max. 2x3.75 W

  • Wa = max

    3.75 W

    Maximum ratings | Wa = max. 2x3 max. 2x3.75 W

  • Plate current

    45 ma

    Maximum ratings | Ia = max. 2x45 max. 2x50 mA

  • Plate current

    50 mA

    Maximum ratings | Ia = max. 2x45 max. 2x50 mA

  • Screen-grid voltage

    200 ma

    Maximum ratings | Vg2 = max. 200 max. 200 V

  • Screen-grid voltage

    200 V

    Maximum ratings | Vg2 = max. 200 max. 200 V

  • Wg

    1.5 ma

    Maximum ratings | Wg2 = max. 2x1.5 max. 2x1.75 w

  • Wg

    1.75 w

    Maximum ratings | Wg2 = max. 2x1.5 max. 2x1.75 w

  • Vg t = max

    100 ma

    Maximum ratings | -Vg t = max. 100 max. 100 V

  • Vg t = max

    100 V

    Maximum ratings | -Vg t = max. 100 max. 100 V

  • Igi = max

    3 ma

    Maximum ratings | Igi = max. 2x3 max. 2x4 mA

  • Igi = max

    4 mA

    Maximum ratings | Igi = max. 2x3 max. 2x4 mA

  • Vkf = max

    100 ma

    Maximum ratings | Vkf = max. 100 max. 100 V

  • Vkf = max

    100 V

    Maximum ratings | Vkf = max. 100 max. 100 V

  • f

    500 MHz

    Maximum ratings | f = 500 500 Mc/s

  • Plate voltage

    200 V

    Maximum ratings | Va = 180 200V

  • Screen-grid voltage

    200 V

    Maximum ratings | Vg2 = 180 200 V

  • Control-grid voltage

    20 V

    Maximum ratings | Vg1 = -20 20V

  • Vg

    50 V

    Maximum ratings | Vg1g1'p = 50 50 V

  • Plate current

    31 mA

    Maximum ratings | Ia = 2x27.5 2x31 mA

  • Screen-grid current

    14 mA

    Maximum ratings | Ig2 = 12.5 14 mA

  • Igi

    0.75 mA

    Maximum ratings | Igi = 2x0.75 2x0.75 mA

  • Wia

    6.2 W

    Maximum ratings | Wia = 2x5 2x6.2 W

  • Wa

    2.6 W

    Maximum ratings | Wa = 2x2.1 2x2.6 W

  • Wg

    2.8 W

    Maximum ratings | Wg2 = 2.25 2.8 W

  • Wig

    1.2 W

    Maximum ratings | Wig1 2) = 1.2 1.2W

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Cathode: oxyde V¢ = 6,3

    12.6 V

  • Katode : Oxyd Ir = 0,6

    300 mA

  • Vy, = max. 250 max

    250 V

    PushPull;Telegraphy

  • Wg = maxXx., 2X3 max. 2x3,

    75 W

  • Ig = max. 2x45 max. 2x5

    0 ma

  • Vg2 = max., 200 max

    200 V

  • Wgo = max. 2x1,5 max. 2x1,

    75 W

  • Vg1 = max. 50 max

    50 V

  • Vi = max, 100 max

    100 V

  • by = 500

    500 Mc/s

  • Va = 180

    200 V

  • Vg2 = 180

    200 V

  • Ia = 2x27,5 2x3

    1 mA

  • Ig2 = 12,5

    14 ma

  • Wig = 2x5 2x6,

    2 W

  • Wa = 2x2,1 2x2,

    6 W

  • Wigl 2) = 1,2

    1.2 W

  • Wo = 5,8

    7.2 W

  • Wy 3) = 5

    6 w

  • f = max. 00 max

    0 Mc/s

    PushPull;Telegraphy

  • f = 500

    500 Mc/s

  • Vg1 = =20

    -20 V

  • Vgigi'p = 50

    50 V

  • Ig2 = 12,5

    14 mA

  • Iz = 2x0,75 2x0,

    75 mA

  • Wia = 2x5 2x6,

    2 W

  • Wg2 = 2,25

    2.8 W

  • Wo = 5,8

    7.2 w

  • w3 = 5

    6 W

  • z max. 500 max

    500 Mc/s

    PushPull

  • Wa = max. 2x2 max, 2x2,

    5 W

  • Ig = max. 2x32 max. 2x4

    0 mA

  • Vg2 = max. 200 max

    200 V

Capacitance

  • Ca

    1.6 pF

    PushPull

  • Cg1

    6.4 PF

    PushPull

  • Cagt = 0,

    16 pF

    PushPull

Characteristic

  • Caractéristiques types par systéme a

    150 v

  • Kenndaten pro System Vg2

    150 V

  • vgagl = 31

    10.5 mA

  • Cooling: Radlation and convection. The use of a closed can

    1 s

  • Température de 1'ampoule (au point le plus chaud) max

    225 °C

  • should not exceed [1]

    7 V

  • should not exceed [2]

    14 V

  • that V¢ is 5.7 Vor

    11.4 V

  • actuel ne surpassera pas 7 Vou

    14 V

  • maniere que V¢

    5.7 V

  • wird, so soll die an der Rohre gemessene Heizspannung

    7 V

  • oder

    14 V

  • dass Vf [1]

    5.7 V

  • dass Vf [2]

    11.4 V