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Power - Triode ·Triode

8161R

Power transmitting triode for RF amplification, oscillation, modulation, or related high-power electronic service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7.5 V / 51.5 A

Description

High-performance ceramic/metal power triode for amplifier, oscillator or modulator service, using a rugged low-inductance mesh filament for improved VHF performance.

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
7.5 V
Nominal heater current
51.5 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
0.02 S
Amplification factor
22
Max plate voltage
6000 V
Max plate dissipation
4000 W
Max grid dissipation
150 W
Max cathode current
2.5 A

Section values promoted from published characteristics and maximum ratings.

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

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Voltage 7.50 ±

    0.37 V

    SourcePage1-2

  • Current @

    7.5 V

    SourcePage1-2

  • Feedback

    20 pF

    SourcePage1-2

Other

  • DC plate voltage 5500 6000

    6000 V

    SourcePage1-2

  • DC plate current 2.0 2.5

    2.5 A

    SourcePage1-2

  • Plate dissipation 2670 4000

    4000 W

    SourcePage1-2

  • Grid dissipation 150 150

    150 W

    SourcePage1-2

  • DC grid voltage -1000 -1000

    -1000 V

    SourcePage1-2

  • DC grid current

    400 mA

    SourcePage1-2

  • (Frequencies to

    110 MHz

    TypicalOperation

  • DC plate voltage 4000 5000

    6000 V

    TypicalOperation

  • DC plate current 2.5 2.5

    2.08 A

    TypicalOperation

  • DC grid voltage* -300 -450

    -500 V

    TypicalOperation

  • DC grid current* 245 265

    180 V

    TypicalOperation

  • Peak RF grid voltage* 580 750

    765 V

    TypicalOperation

  • Driving Power* 142 197

    136 W

    TypicalOperation

  • Grid dissipation* 68 78

    46 W

    TypicalOperation

  • Plate input power 10,000 12,500

    12500 W

    TypicalOperation

  • Plate dissipation 2500 2500

    2500 W

    TypicalOperation

  • Plate output power 7500 10,000

    10000 W

    TypicalOperation

  • (Frequencies to

    30 MHz

    TypicalOperation

  • DC plate voltage 4000 4500

    5000 V

    TypicalOperation

  • DC plate current 1.67 1.47

    1.25 A

    TypicalOperation

  • DC grid voltage -450 -500

    -550 V

    TypicalOperation

  • DC grid current* 180 140

    150 mA

    TypicalOperation

  • Peak RF grid voltage* 685 715

    760 V

    TypicalOperation

  • Driving power 125 100

    115 W

    TypicalOperation

  • Grid dissipation* 43 30

    32 W

    TypicalOperation

  • DC plate input power 6670 6615

    6250 W

    TypicalOperation

  • Plate dissipation 1670 1315

    950 W

    TypicalOperation

  • Plate output power 5000 5300

    5300 W

    TypicalOperation

  • DC plate voltage

    6000 V

    SourcePage1-2

  • DC plate purrent

    2.5 A

    SourcePage1-2

  • Plate dissipation

    4000 W

    SourcePage1-2

  • Grid dissipation

    150 W

    SourcePage1-2

  • DC grid voltage

    -1000 V

    SourcePage1-2

  • Zero-signal DC plate current* 0.6 0.5

    400 mA

    TypicalOperation

  • Maximum-signal DC plate current 4.0 3.2

    3 A

    TypicalOperation

  • DC grid voltage** -150 -190

    -240 V

    TypicalOperation

  • Peak AF grid voltage (per tube)* 340 360

    390 V

    TypicalOperation

  • Maximum-signal peak driving power* 340 230

    225 W

    TypicalOperation

  • Maximum-signal nominal driving power* 170 115

    113 W

    TypicalOperation

  • Load resistance, plate-to-plate 2200 3600

    4650 Ohms

    TypicalOperation