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Power - Triode ·Triode

2C41

High-mu planar power triode for plate-pulsed oscillators and RF power amplifiers from lower frequencies into the microwave region. Ring-seal construction minimizes inductance and capacitance for cavity and parallel-line circuits approaching 3 GHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 1.03 A

Description

The ML-2C41 is a high-mu triode of the planar-electrode suited to cavity type circuits as well as for parallel line opera- type designed for use as a plate-pulsed oscillator, or power tion. The cathode is an indirectly-heated, oxide-coated disc. amplifier in radio transmitting service from low frequency to The anode is forced-air cooled. 3000 Mc. Features include low interelectrode capacitances, The ML-2C41 embodies the highest standards of this inductances and r.f. losses are minimized by a compact, rugged Machlett techniques to assure efficient operation and long life. construction with ring-type seals, making the tube ideally

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
6.3 V
Nominal heater current
1.03 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
0.025 S
Amplification factor
100
Max plate dissipation
35 W
Max grid dissipation
2 W

Promoted fields populated from explicitly published ratings/characteristics; service-specific data retained as parameters.

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

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Published value [1]

    3000 MHz

    3000 Mc. Features include low interelectrode capacitances, The ML-2C41 embodies the highest standards of this

  • Published value [2]

    2 MHz

    3000 Mc. Features include low interelectrode capacitances, The ML-2C41 embodies the highest standards of this

  • Published value [3]

    1 MHz

    3000 Mc. Features include low interelectrode capacitances, The ML-2C41 embodies the highest standards of this

  • Heater Current at [1]

    6.3 V

    Heater Current at 6.3 volts .......... 1.03 amps

  • Heater Current at [2]

    1.03 V

    Heater Current at 6.3 volts .......... 1.03 amps

  • Heater Heating Time, minimum

    60 s

    Heater Heating Time, minimum 60 secs

  • Amplification Factor

    100

    Amplification Factor ... ... 100

  • Maximum Anode Temperature

    175 mA

    Maximum Anode Temperature 175 °C

  • For a pulse length of * SRR [1]

    3 V

    For a pulse length of * SRR 3 usec Filament Current at 6.3 volts (Note 1) . 0.95 1.10 A

  • For a pulse length of * SRR [2]

    6.3 V

    For a pulse length of * SRR 3 usec Filament Current at 6.3 volts (Note 1) . 0.95 1.10 A

  • For a pulse length of * SRR [3]

    1 V

    For a pulse length of * SRR 3 usec Filament Current at 6.3 volts (Note 1) . 0.95 1.10 A

  • For a pulse length of * SRR [4]

    0.95 V

    For a pulse length of * SRR 3 usec Filament Current at 6.3 volts (Note 1) . 0.95 1.10 A

  • For a pulse length of * SRR [5]

    1.1 V

    For a pulse length of * SRR 3 usec Filament Current at 6.3 volts (Note 1) . 0.95 1.10 A

  • Duty Factor * [1]

    0.0025 mA

    Duty Factor * ... .. 0.0025 Plate Current (Note 2) ... . 60 95 mAdc

  • Duty Factor * [2]

    2 mA

    Duty Factor * ... .. 0.0025 Plate Current (Note 2) ... . 60 95 mAdc

  • Duty Factor * [3]

    60 mA

    Duty Factor * ... .. 0.0025 Plate Current (Note 2) ... . 60 95 mAdc

  • Duty Factor * [4]

    95 mA

    Duty Factor * ... .. 0.0025 Plate Current (Note 2) ... . 60 95 mAdc

  • Peak Plate Pulse Supply Voltage [1]

    3500 V

    Peak Plate Pulse Supply Voltage ................. .. 3500 volts Cut-off Bias (Note 3) ... — -15 Vdce

  • Peak Plate Pulse Supply Voltage [2]

    3 V

    Peak Plate Pulse Supply Voltage ................. .. 3500 volts Cut-off Bias (Note 3) ... — -15 Vdce

  • Peak Plate Pulse Supply Voltage [3]

    -15 V

    Peak Plate Pulse Supply Voltage ................. .. 3500 volts Cut-off Bias (Note 3) ... — -15 Vdce

  • Peak Grid Bias Voltage TR [1]

    -150 V

    Peak Grid Bias Voltage TR -150 wvolts Transconductance ................................... 20,000 30,000 umbhos

  • Peak Grid Bias Voltage TR [2]

    20000 V

    Peak Grid Bias Voltage TR -150 wvolts Transconductance ................................... 20,000 30,000 umbhos

  • Peak Grid Bias Voltage TR [3]

    30000 V

    Peak Grid Bias Voltage TR -150 wvolts Transconductance ................................... 20,000 30,000 umbhos

  • Peak Plate Current from Pulse Supply [1]

    4 A

    Peak Plate Current from Pulse Supply ........... 4 amps Grid-Plate Capacitance ........................ 1.86 2.16 uuf

  • Peak Plate Current from Pulse Supply [2]

    1.86 A

    Peak Plate Current from Pulse Supply ........... 4 amps Grid-Plate Capacitance ........................ 1.86 2.16 uuf

  • Peak Plate Current from Pulse Supply [3]

    2.16 A

    Peak Plate Current from Pulse Supply ........... 4 amps Grid-Plate Capacitance ........................ 1.86 2.16 uuf

  • Average Plate Current U [1]

    10 mA

    Average Plate Current U 10 mA Grid-Cathode Capacitance (Note 4) ... 5.60 7.60 uuf

  • Average Plate Current U [2]

    4 mA

    Average Plate Current U 10 mA Grid-Cathode Capacitance (Note 4) ... 5.60 7.60 uuf

  • Average Plate Current U [3]

    5.6 mA

    Average Plate Current U 10 mA Grid-Cathode Capacitance (Note 4) ... 5.60 7.60 uuf

  • Average Plate Current U [4]

    7.6 mA

    Average Plate Current U 10 mA Grid-Cathode Capacitance (Note 4) ... 5.60 7.60 uuf

  • Average Grid Current e [1]

    6 mA

    Average Grid Current e 6 mA Plate-Cathode Capacitance ................... — 035 uuf

  • Average Grid Current e [2]

    35 mA

    Average Grid Current e 6 mA Plate-Cathode Capacitance ................... — 035 uuf

  • Average Plate Dissipation e [1]

    35 W

    Average Plate Dissipation e 35 watts Plate Tuning Range (Note 5) ... 1960 2030 Mc

  • Average Plate Dissipation e [2]

    5 W

    Average Plate Dissipation e 35 watts Plate Tuning Range (Note 5) ... 1960 2030 Mc

  • Average Plate Dissipation e [3]

    1960 W

    Average Plate Dissipation e 35 watts Plate Tuning Range (Note 5) ... 1960 2030 Mc

  • Average Plate Dissipation e [4]

    2030 W

    Average Plate Dissipation e 35 watts Plate Tuning Range (Note 5) ... 1960 2030 Mc

  • Average Grid Dissipation e

    2 W

    Average Grid Dissipation e 2 watts

  • Frequency N o [1]

    3000 MHz

    Frequency N o 3000 Mc Note 1-— For reduced filament voltage see "Heater Voltage™ section

  • Frequency N o [2]

    1 MHz

    Frequency N o 3000 Mc Note 1-— For reduced filament voltage see "Heater Voltage™ section

  • Typical Operation [1]

    2500 V

    Typical Operation: 2500 Mc Oscillator Note 2 — Measured at a plate voltage of 600 volts and a cathode-

  • Typical Operation [2]

    2 V

    Typical Operation: 2500 Mc Oscillator Note 2 — Measured at a plate voltage of 600 volts and a cathode-

  • Typical Operation [3]

    600 V

    Typical Operation: 2500 Mc Oscillator Note 2 — Measured at a plate voltage of 600 volts and a cathode-

  • Duty Factor [1]

    0.0025 mA

    Duty Factor ... . 0.0025 Note 3 ~— Measured at 1 mA of plate current and a plate voltage

  • Duty Factor [2]

    3 mA

    Duty Factor ... . 0.0025 Note 3 ~— Measured at 1 mA of plate current and a plate voltage

  • Duty Factor [3]

    1 mA

    Duty Factor ... . 0.0025 Note 3 ~— Measured at 1 mA of plate current and a plate voltage

  • Peak Plate Pulse Supply Voltage [1]

    3500 V

    Peak Plate Pulse Supply Voltage . 3500 volts of 600 volts.

  • Peak Plate Pulse Supply Voltage [2]

    600 V

    Peak Plate Pulse Supply Voltage . 3500 volts of 600 volts.

  • Peak Grid Bias Voltage

    -100 V

    Peak Grid Bias Voltage . -100 volts

  • Note

    4

    Note 4 — Capacitance measurements are with the tube cold. When

  • Peak R-F Grid Voltage

    340 V

    Peak R-F Grid Voltage 340 volts the filament is heated to proper operating temperature

  • Peak R-F Plate Voltage T [1]

    2500 V

    Peak R-F Plate Voltage T 2500 volts the grid-cathode capacitance will increase by about 1 uuf

  • Peak R-F Plate Voltage T [2]

    1 V

    Peak R-F Plate Voltage T 2500 volts the grid-cathode capacitance will increase by about 1 uuf

  • Peak Plate Current from Pulse Supply

    3 A

    Peak Plate Current from Pulse Supply . 3 amps due to thermal expansion of the cathode.

  • Average Grid Current TR

    4.5 mA

    Average Grid Current TR 4.5 mA tubes will resonate within the specified frequency range.

  • Driving Power During Pulse, Approximate

    450 mA

    Driving Power During Pulse, Approximate 450 watts

  • Useful Power Output at Peak of Pulse, Approx

    2200 W

    Useful Power Output at Peak of Pulse, Approx. .. 2200 watts