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Power - Triode (over 1000V 100W) ·Triode

ACT28

Forced-air-cooled disc-seal triode for pulsed UHF oscillator service in common-grid coaxial circuits to approximately 400 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
16 V / 7.3 A

Description

The ACT28 is a forced-air-cooled disc-seal triode for pulsed UHF oscillator service in common-grid coaxial circuits at frequencies up to about 400 MHz.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
16 V
Nominal heater current
7.3 A
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

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.05 S
Max plate voltage
11000 V
Max plate dissipation
1500 W

Published maximum ratings and characteristics audited; remaining useful numerical data retained 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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • General. The ACT2 [1]

    8

    General. The ACT28 is a forced-air-cooled disc seal 85236“ J]

  • General. The ACT2 [2]

    85236

    General. The ACT28 is a forced-air-cooled disc seal 85236“ J]

  • common grid co-axial circuits at frequencies up to K [1]

    3

    common grid co-axial circuits at frequencies up to K - 3 ON 4-25"

  • common grid co-axial circuits at frequencies up to K [2]

    4

    common grid co-axial circuits at frequencies up to K - 3 ON 4-25"

  • common grid co-axial circuits at frequencies up to K [3]

    -25

    common grid co-axial circuits at frequencies up to K - 3 ON 4-25"

  • Cooling. The flow of air to the anode should be [1]

    2

    Cooling. The flow of air to the anode should be 2-128'

  • Cooling. The flow of air to the anode should be [2]

    -128

    Cooling. The flow of air to the anode should be 2-128'

  • All cooling supplies must be in operation before [1]

    10

    All cooling supplies must be in operation before 10-063 '

  • All cooling supplies must be in operation before [2]

    -63

    All cooling supplies must be in operation before 10-063 '

  • applying any voltage to the valve and should continue o J g

    373 V

    applying any voltage to the valve and should continue o J g 0373..

  • voltages

    4125 V

    voltages. 04125 ’

  • four minutes before the application of the anode

    0.875

    four minutes before the application of the anode . 0.875"

  • voltage. t0

    -2 V

    voltage. t0-02d

  • The holes in the grid ring are provided for cooling *

    40

    The holes in the grid ring are provided for cooling *.040'

  • Inside diameter of anode line [1]

    4

    Inside diameter of anode line 4:75 in. yZ3 45

  • Inside diameter of anode line [2]

    75

    Inside diameter of anode line 4:75 in. yZ3 45

  • Inside diameter of anode line [3]

    45

    Inside diameter of anode line 4:75 in. yZ3 45

  • Outside diameter of grid line

    4

    Outside diameter of grid line 4 in.

  • Va (pulse) (max.)

    11

    Va (pulse) (max.) 11 kv

  • Frequency [1]

    200 MHz

    Frequency 200 400 400 600 Mc/s.

  • Frequency [2]

    400 MHz

    Frequency 200 400 400 600 Mc/s.

  • Frequency [3]

    400 MHz

    Frequency 200 400 400 600 Mc/s.

  • Frequency [4]

    600 MHz

    Frequency 200 400 400 600 Mc/s.

  • Line length [1]

    34

    Line length 34 14 46 375 cm. Ia (av) (during pulse) {max.) 50

  • Line length [2]

    14

    Line length 34 14 46 375 cm. Ia (av) (during pulse) {max.) 50

  • Line length [3]

    46

    Line length 34 14 46 375 cm. Ia (av) (during pulse) {max.) 50

  • Line length [4]

    375

    Line length 34 14 46 375 cm. Ia (av) (during pulse) {max.) 50

  • Line length [5]

    50

    Line length 34 14 46 375 cm. Ia (av) (during pulse) {max.) 50

  • Mode M4 A4 [1]

    3

    Mode M4 A4 3A/4 3N/4 t pulse (max.) s

  • Mode M4 A4 [2]

    4

    Mode M4 A4 3A/4 3N/4 t pulse (max.) s

  • Mode M4 A4 [3]

    3

    Mode M4 A4 3A/4 3N/4 t pulse (max.) s

  • Mode M4 A4 [4]

    4

    Mode M4 A4 3A/4 3N/4 t pulse (max.) s

  • Heater Ca_g

    28

    Heater Ca_g 28