2000T

Very large Eimac transmitting triode for high-power RF amplifier, oscillator, modulator, and audio-power service. Rated for 2 kW plate dissipation, it supports multi-kilowatt RF output and push-pull audio output approaching 9 kW.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SPECIAL4
Base pins: 4
Nominal heater: 10 V / 23.5 A

Description

The Eimac 2000T is a medium-mu high-vacuum transmitting triode for high-power amplifier, oscillator, and modulator service, rated for 2000 watts plate dissipation.

Socket description

Special 4-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SPECIAL4
Base pins: 4
Nominal heater voltage: 10 V
Nominal heater current: 23.5 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: 0.011 S
Amplification factor: 23
Max plate voltage: 8000 V
Max plate dissipation: 2000 W
Max grid dissipation: 150 W

Published RF/AF maximum ratings and average characteristics promoted.

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

1950 Eimac Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

m o d u la t o r servic e . It has a ma ximum plate d issipa tion rating of [1]
2000
m o d u la t o r servic e . It has a ma ximum plate d issipa tion rating of 2000 wa tts . Cooling of the 2000T is
m o d u la t o r servic e . It has a ma ximum plate d issipa tion rating of [2]
2000
m o d u la t o r servic e . It has a ma ximum plate d issipa tion rating of 2000 wa tts . Cooling of the 2000T is
Voltage
10 V
Voltage 10.0 vol ts
Current [1]
25 A
Current - 25 .0 amperes
Current [2]
0 mA
Current - 25 .0 amperes
Grid-Plate
8.5
Grid-Plate 8.5 p.p.fd .
Grid - Filament [1]
12
Grid - Filament - 12 .7 p.p.fd .
Grid - Filament [2]
7
Grid - Filament - 12 .7 p.p.fd .
D·C PLATE VOLTAGE - ~
8000 V
D·C PLATE VOLTAGE - ~8000 MAX. VOLTS
D-C PLATE VOLTAGE - ~
8 V
D-C PLATE VOLTAGE - ~ 8ooo MA X. VOLTS
D·C PLATE CURRENT
1.75 mA
D·C PLATE CURRENT 1.75 MAX . AMPS .
MAX-SIGNAL D·C PLATE CURRE NT, PER TUBE
1.75
MAX-SIGNAL D·C PLATE CURRE NT, PER TUBE 1.75 MAX. A M PS.
PLATE DISSIP ATIO N
2000
PLATE DISSIP ATIO N 2000 MA X. WA TTS
PLATE DISSIP ATION, PER TU8E
2000
PLATE DISSIP ATION, PER TU8E - 2000 MAX. WATTS
GRID DISSI PATION
150
GRID DISSI PATION 150 MAX. W ATTS
GRID DISSIPATION , PER TUBE
150 W
GRID DISSIPATION , PER TUBE 150 MAX. WATTS
D-C Pla te Voltag e [1]
5000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Pla te Voltag e [2]
6000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Pla te Voltag e [3]
7000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Pla te Voltag e [4]
5000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Pla te Voltag e [5]
6000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Pla te Voltag e [6]
7000 V
D-C Pla te Voltag e 5000 6000 7000 vo lts D-C Plate Voltage 5000 6000 7000 vo lts
D-C Grid Voltage [1]
-350 V
D-C Grid Voltage -350 -SOO -600 volts D-C G rid Voltage -180 -230 -290 vo lts
D-C Grid Voltage [2]
-600 V
D-C Grid Voltage -350 -SOO -600 volts D-C G rid Voltage -180 -230 -290 vo lts
D-C Grid Voltage [3]
-180 V
D-C Grid Voltage -350 -SOO -600 volts D-C G rid Voltage -180 -230 -290 vo lts
D-C Grid Voltage [4]
-230 V
D-C Grid Voltage -350 -SOO -600 volts D-C G rid Voltage -180 -230 -290 vo lts
D-C Grid Voltage [5]
-290 V
D-C Grid Voltage -350 -SOO -600 volts D-C G rid Voltage -180 -230 -290 vo lts
D-C Plate Curren t [1]
1.35
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Plate Curren t [2]
1.35
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Plate Curren t [3]
1.15
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Plate Curren t [4]
480
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Plate Curren t [5]
400
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Plate Curren t [6]
350
D-C Plate Curren t 1.35 1.35 1.15 amp s Ze ro -Sig nal D-C Plate Curren t 480 400 350 mao
D-C Grid Current [1]
175 mA
D-C Grid Current 175 165 120 ma o Max -Signal D-C Pla te Current 2.00 1.8B I.B6 amps .
D-C Grid Current [2]
165 mA
D-C Grid Current 175 165 120 ma o Max -Signal D-C Pla te Current 2.00 1.8B I.B6 amps .
D-C Grid Current [3]
120 mA
D-C Grid Current 175 165 120 ma o Max -Signal D-C Pla te Current 2.00 1.8B I.B6 amps .
D-C Grid Current [4]
2 mA
D-C Grid Current 175 165 120 ma o Max -Signal D-C Pla te Current 2.00 1.8B I.B6 amps .
D-C Grid Current [5]
1.8 mA
D-C Grid Current 175 165 120 ma o Max -Signal D-C Pla te Current 2.00 1.8B I.B6 amps .
Gr id Dissipation [1]
79 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Gr id Dissipation [2]
78 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Gr id Dissipation [3]
43 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Gr id Dissipation [4]
4900 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Gr id Dissipation [5]
6650 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Gr id Dissipation [6]
8500 W
Gr id Dissipation 79 78 43 wa tt s Effective Load, Pla t e -to- Pla te 4900 6650 8500 ohms
Peak R-F G rid Input Vo lt a g e (appro x.) [1]
900 V
Peak R-F G rid Input Vo lt a g e (appro x.) 900 1050 1060 vo lts Peak A- F G rid Input Voltage (per t ube ) 470 525 590 vo lts
Peak R-F G rid Input Vo lt a g e (appro x.) [2]
1050 V
Peak R-F G rid Input Vo lt a g e (appro x.) 900 1050 1060 vo lts Peak A- F G rid Input Voltage (per t ube ) 470 525 590 vo lts
Peak R-F G rid Input Vo lt a g e (appro x.) [3]
1060 V
Peak R-F G rid Input Vo lt a g e (appro x.) 900 1050 1060 vo lts Peak A- F G rid Input Voltage (per t ube ) 470 525 590 vo lts

Data set 02

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid-Plate Capacitance
8.5 pF
Grid-Filament Capacitance
12.7 pF
Plate-Filament Capacitance
1.7 pF

Other

Maximum DC Plate Current
1.75 A
RF/AF
RF Typical Plate Voltage
7000 V
ClassC
RF Typical Plate Power Output
6000 W
ClassC
AF Typical Plate Voltage
7000 V
ClassB;TwoTubes
AF Typical Plate Power Output
9000 W
ClassB;TwoTubes

Data set 03

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

and modulator service. It has a maximum plate dissipation rating of [1]
2000 W
and modulator service. It has a maximum plate dissipation rating of 2000 wet+s. Cooling of the 2000T
and modulator service. It has a maximum plate dissipation rating of [2]
2000 W
and modulator service. It has a maximum plate dissipation rating of 2000 wet+s. Cooling of the 2000T
Voltage
10 V
Voltage - - 10.0 volts
Current
23.5 A
Current - - 23.5 amperes
Transconductance (ib=l [1]
75 mA/V
Transconductance (ib=l.75 amp., Eh=6000 v.) - - -
Transconductance (ib=l [2]
6000 mA/V
Transconductance (ib=l.75 amp., Eh=6000 v.) - - -
Plate . . Eimac HR
8
Plate . . Eimac HR-8
AUDIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION
2 W
AUDIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION-2 TUBES
D-C PIATE VOLTAGE
8000 V
D-C PIATE VOLTAGE ----- 8000 MAX. VOLTS
PLATE DISSIPATION. PER TUBE
2000 W
PLATE DISSIPATION. PER TUBE - - - 2000 MAX. WATTS
D-C Plate Current - - - - , I [1]
35 A
D-C Plate Current - - - - , I.35 I.35 I.15 Amp!.
D-C Plate Current - - - - , I [2]
35 A
D-C Plate Current - - - - , I.35 I.35 I.15 Amp!.
D-C Plate Current - - - - , I [3]
15 A
D-C Plate Current - - - - , I.35 I.35 I.15 Amp!.
MAXIMUM RATINGS (Frequencies below
40 MHz
MAXIMUM RATINGS (Frequencies below 40 Mc.) Plat® Power Input - - -
D-C PLATE VOLTAGE
8000 V
D-C PLATE VOLTAGE ----- 8000 MAX. VOLTS Plate power output - - -
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION, PER TUBE'. (Fr®quenci®s below
40 MHz
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION, PER TUBE'. (Fr®quenci®s below 40 Mc.)
MAXIMUM RATINGS (Frequencies below
40 MHz
MAXIMUM RATINGS (Frequencies below 40 Mc.) Driving power (approx.) - - -
D-C PLATE VOLTAGE
6000 V
D-C PLATE VOLTAGE ----- 6000 MAX. VOLTS Plato Dissipation -----
D-C PLATE CURRENT ----- l`
4 mA
D-C PLATE CURRENT ----- l`4 MAX AMPS.
PLATE DISSIPATloN
1350
PLATE DISSIPATloN ------ 1350 MAX. WATTS
GRID DISSIPATION
150 W
GRID DISSIPATION ------ 150 MAX. WATTS
Published value [1]
8 V
8eoc:lei:gfi°Forsceevde.ra:rvitroai:i°gni:nrdeqsuhi::5.ontheenvelope Plate Voltage-The plate supply voltage for the 2000T
Published value [2]
5 V
8eoc:lei:gfi°Forsceevde.ra:rvitroai:i°gni:nrdeqsuhi::5.ontheenvelope Plate Voltage-The plate supply voltage for the 2000T
Published value [3]
2000 V
8eoc:lei:gfi°Forsceevde.ra:rvitroai:i°gni:nrdeqsuhi::5.ontheenvelope Plate Voltage-The plate supply voltage for the 2000T
and also in the base of the tube. Envelope cooling may should not exceed
8000
and also in the base of the tube. Envelope cooling may should not exceed 8000 volts. In most cases there is little
be accomplished by locating an ordinary
8 V
be accomplished by locating an ordinary 8- or lo-inch fan advantage in using plate-supply voltages higher than
Base cooling requires an air flow of [1]
21 W
Base cooling requires an air flow of 21/2 cu. ft. per min. Grid Dissipation~The power dissipated by the grid of the
Base cooling requires an air flow of [2]
2 W
Base cooling requires an air flow of 21/2 cu. ft. per min. Grid Dissipation~The power dissipated by the grid of the
directed up through the bottom of the base toward the [1]
2000 W
directed up through the bottom of the base toward the 2000T must not exceed 150 watts. Grid dissipation may
directed up through the bottom of the base toward the [2]
150 W
directed up through the bottom of the base toward the 2000T must not exceed 150 watts. Grid dissipation may
Published value
0.1 W
0.1 inch of water is required at the manifold to provide where Pg±Grid dissipation,
the [1]
21 V
the 21/2 cu. ft. per min. ecmp± Peak positive grid voltage, and
the [2]
2 V
the 21/2 cu. ft. per min. ecmp± Peak positive grid voltage, and
One type of socket provides a [1]
1 A
One type of socket provides a 1/4 inch diameter pipe Ic±D-c grid current.
One type of socket provides a [2]
4 A
One type of socket provides a 1/4 inch diameter pipe Ic±D-c grid current.
filament voltage must be kept within t,he range from
9.5 V
filament voltage must be kept within t,he range from 9.5 Plate Dissipation-Under normal operating conditions,
to [1]
10.5 W
to 10.5 volts. All four socket terminals should be used, the power dissipated by the plate of the 2000T should
to [2]
2000 W
to 10.5 volts. All four socket terminals should be used, the power dissipated by the plate of the 2000T should
putting two in parallel for each filament connection. not be allowed to exceed
2000 W
putting two in parallel for each filament connection. not be allowed to exceed 2000 watts. Plate dissipation in
the bias voltage which may be used on the
2000 V
the bias voltage which may be used on the 2000T there is periods of time, such as during tuning procedures.
at plate voltages of [1]
5000 V
at plate voltages of 5000, 6000, and 7a -3 •
at plate voltages of [2]
6000 V
at plate voltages of 5000, 6000, and 7a -3 •
at plate voltages of [3]
7 V
at plate voltages of 5000, 6000, and 7a -3 •
at plate voltages of [4]
-3 V
at plate voltages of 5000, 6000, and 7a -3 •
bined grid and bias losses only. The /
1
bined grid and bias losses only. The / 1 A'