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Power - Beam (NOT sweep) ·BeamPower

TT22

12.6 V heater companion to TT21, intended for RF power amplification, audio output, and pulse-modulator service with approximately 45 W plate dissipation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 800 mA

Description

The TT22 is the 12.6-volt-heater companion to the TT21 beam tetrode, for RF power, audio-output, and pulse-modulator service.

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
12.6 V
Nominal heater current
800 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

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
12000 Ω
Transconductance
0.011 S
Max plate voltage
1250 V
Max screen voltage
600 V
Max plate dissipation
45 W
Max screen dissipation
6 W
Max grid dissipation
2 W

Published maximum ratings and characteristics audited; remaining useful numerical data retained in parameter table.

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

Beam Power

Other

  • Beam tetrodes with oxide coated cathodes, the TT2 [1]

    1

    Beam tetrodes with oxide coated cathodes, the TT21 and TT22 are identical except

  • Beam tetrodes with oxide coated cathodes, the TT2 [2]

    2

    Beam tetrodes with oxide coated cathodes, the TT21 and TT22 are identical except

  • at frequencies up to

    30 MHz

    at frequencies up to 30Mc/s and are also useful as audio output valves and pulse modulators.

  • HEATER TT2 [1]

    1

    HEATER TT21 TT22

  • HEATER TT2 [2]

    2

    HEATER TT21 TT22

  • iarpk) (pulse) [1]

    75

    iarpk) (pulse) 75 7-5 A

  • iarpk) (pulse) [2]

    7

    iarpk) (pulse) 75 7-5 A

  • iarpk) (pulse) [3]

    -5

    iarpk) (pulse) 75 7-5 A

  • Rg1 -k (cathode bias) [1]

    220

    Rg1 -k (cathode bias) 220 220 kQ

  • Rg1 -k (cathode bias) [2]

    220

    Rg1 -k (cathode bias) 220 220 kQ

  • Efficiency [1]

    61

    Efficiency 61 75 78 81 %

  • Efficiency [2]

    75

    Efficiency 61 75 78 81 %

  • Efficiency [3]

    78

    Efficiency 61 75 78 81 %

  • Efficiency [4]

    81

    Efficiency 61 75 78 81 %

  • Efficiency [1]

    59

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [2]

    74

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [3]

    765

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [4]

    74

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [5]

    -5

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [6]

    795

    Efficiency 59 74 765 74-5 795 %

  • Efficiency [1]

    72

    Efficiency 72 76 80 81 %

  • Efficiency [2]

    76

    Efficiency 72 76 80 81 %

  • Efficiency [3]

    80

    Efficiency 72 76 80 81 %

  • Efficiency [4]

    81

    Efficiency 72 76 80 81 %

  • Efficiency [1]

    70

    Efficiency 70 755 785 82

  • Efficiency [2]

    755

    Efficiency 70 755 785 82

  • Efficiency [3]

    785

    Efficiency 70 755 785 82

  • Efficiency [4]

    82

    Efficiency 70 755 785 82

  • Efficiency [1]

    63

    Efficiency 63 69

  • Efficiency [2]

    69

    Efficiency 63 69

  • Fig [1]

    1 A

    Fig. 1. Constant anode current curves at Vg2==300V.

  • Fig [2]

    300 A

    Fig. 1. Constant anode current curves at Vg2==300V.

  • Fig [1]

    2 A

    Fig. 2. Constant screen current curves at Vg2=2300V.

  • Fig [2]

    2300 A

    Fig. 2. Constant screen current curves at Vg2=2300V.

  • Fig [1]

    3 A

    Fig. 3. Constant grid current curves at Vg2=300V.

  • Fig [2]

    300 A

    Fig. 3. Constant grid current curves at Vg2=300V.

  • Fig [1]

    4 A

    Fig. 4. Anode current curves at Vg2=300V and Vg negative.

  • Fig [2]

    300 A

    Fig. 4. Anode current curves at Vg2=300V and Vg negative.

  • Fig [1]

    5 A

    Fig. 5. Constant anode current curves at Vg2=600V.

  • Fig [2]

    600 A

    Fig. 5. Constant anode current curves at Vg2=600V.

  • Fig [1]

    6 A

    Fig. 6. Constant screen current curves at Vg2=600V.

  • Fig [2]

    600 A

    Fig. 6. Constant screen current curves at Vg2=600V.

  • Fig [1]

    7 A

    Fig. 7. Constant grid current curves at Vg2=600V.

  • Fig [2]

    600 A

    Fig. 7. Constant grid current curves at Vg2=600V.

  • Fig

    8 A

    Fig. 8. Anode current curves for pulse modulator applications.

  • Fig

    9 A

    Fig. 9. Screen current curves for pulse modulator applications.

  • Fig

    10 A

    Fig. 10. Grid current curves for pulse modulator applications.

  • Fig

    12 V

    Fig. 12. Class C telegraphy. Power output/anode voltage curves.

  • Fig

    13

    Fig. 13. Anode modulated class C telephony.

  • Heater voltage

    12.6 V

    Published heater rating.

  • Heater current

    800 mA

    Approximate published heater current.