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35TG

Eimac high-mu transmitting triode for modulator, oscillator, and amplifier service. Its roughly 50 W plate dissipation and 2 kV plate rating provide useful medium-power capability in both RF transmitter and audio-frequency modulator stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 5 V / 4.2 A

Description

The EIMAC 35TG is a high-mu transmitting triode for modulator, oscillator, and amplifier service.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: 4
Nominal heater voltage: 5 V
Nominal heater current: 4.2 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: 0.00285 S
Amplification factor: 43
Max plate voltage: 2000 V
Max plate dissipation: 50 W
Max grid dissipation: 15 W

Single triode section; promoted values mapped from printed General Characteristics and Maximum Ratings headings.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

The EIMAC 35TG is a high-mu triode having a maximum plate dissipation of 50 watts. It is
35 a
| The EIMAC 35TG is a high-mu triode having a maximum plate dissipation of 50 watts. It is
Voltage
5 volts
GeneralCharacteristics | Voltage - - - - - - - - - - - - - - 5.0 volts
Current
386 amps
GeneralCharacteristics | Current - - - - - - - - - - - - . - 386 4.2 amps
Amplification Factor
35
GeneralCharacteristics | Amplification Factor - - - - - - - - - - - - . 35 43
Grid-Plate
125 pF
GeneralCharacteristics | Grid-Plate - - - - - - - - - - - . : 125 2.05 pF
Grid-Filament
200 pF
GeneralCharacteristics | Grid-Filament - - - - - - - - - - - - 200 3.20 pF
Plate-Filament
10 pF
GeneralCharacteristics | Plate-Filament - - - - - - - - - - - 010 0.35 pF
Transconductance (I,
100 mA
GeneralCharacteristics | Transconductance (I, — 100 mA) S 2850 umhos

Other

at frequencies up to 100 MHz. It is basically the same as the EIMAC 35T except that the grid
100 MHz
MaximumRatings | at frequencies up to 100 MHz. It is basically the same as the EIMAC 35T except that the grid
Length
55 inches
| Length - - - - - - - . . - - - - - - - - - - - - - -« - - - - - - 55 inches
Diameter
18 inches
| Diameter - - - - - - - - - - - - - - - - - - - - . - - - - - - - 18 inches
Net weight
4 ounces
| Net weight - - - - = - - - - - - 4 - 4 - - 4 - - - - - - - - - - - - 25 ounces
Shipping weight (Average)
125 pounds
| Shipping weight (Average)- - - - - = = - = - - - - - « - - - - - - - - - 125 pounds
AND MODULATOR DC Plate Voltage
6001000 volts
AUDIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | AND MODULATOR DC Plate Voltage - - - - 6001000 1500 2000 volts
DC Grid Voltage (approx.)* 0 -8 —25 —40 volts
0 volts
AUDIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | DC Grid Voltage (approx.)* 0 -8 —25 —40 volts
Class AB (Sinusoidal wave, two tubes unless otherwise Zero-signal DC Plate Current 90 67 45 34 mA
90 mA
AUDIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | Class AB (Sinusoidal wave, two tubes unless otherwise Zero-signal DC Plate Current 90 67 45 34 mA
specified) Max-signal DC Plate Current 300 240 200 167 mA
300 mA
AUDIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | specified) Max-signal DC Plate Current 300 240 200 167 mA
Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
4250 ohms
AUDIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
DC Plate Voltage
2000 volts
MaximumRatings | DC Plate Voltage - - - - - - - - 2000 volts (per tube) - - - - - 130 240 250 255 volts
DC Plate Current
150 mA
MaximumRatings | DC Plate Current - - - - - - - - 150 mA Peak Driving Power (approx.) 18 14 10 8 watts
Plate Dissipation
50 watts
MaximumRatings | Plate Dissipation - - - - - - - - - 50 watts Nominal Driving Power {app.) 9 7 5 4 watts
Grid Dissipation
15 watts
MaximumRatings | Grid Dissipation - - - - - 15 watts Max-signal Plate Power Output 95 140 200 235 watts
AND OSCILLATOR DC Plate Voltage
1000 volts
RADIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | AND OSCILLATOR DC Plate Voltage - - - - - 1000 1500 2000 volts
DC Grid Voltage
80 volts
RADIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | DC Grid Voltage - - - - - —80 —120 —135 volts
Class-C Telegraphy or FM Telephony DC Plate Current
125 mA
RADIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | Class-C Telegraphy or FM Telephony DC Plate Current - - - - - 125 125 125 mA
)1 DC Grid Current
1 mA
RADIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | )1 DC Grid Current - - = o 40 40 45 mA
Peak RF Grid Input Voltage
165 volts
RADIO FREQUENCY POWER AMPLIFIER TYPICAL OPERATION | Peak RF Grid Input Voltage - - 165 250 285 volts
DC Plate Voltage
2000 volts
MaximumRatings | DC Plate Voltage - - - - - - - - 2000 volts Grid Dissipation - - - - - 42 50 6.8 watts
DC Plate Current
150 mA
MaximumRatings | DC Plate Current - - - - - - - - 150 mA Plate Power Input - - - - - 125 188 250 watts
Plate Dissipation
50 watts
MaximumRatings | Plate Dissipation - - - - - - - - - 50 watts Plate Dissipation - - - - - 38 47 50 watts
Grid Dissipation
15 watts
MaximumRatings | Grid Dissipation - - - - - - - 15 watts Plate Power Output - - - - 87 141 200 watts
POWER AMPLIFIER DC Plate Voltage
750 volts
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION | POWER AMPLIFIER DC Plate Voltage - - - - - 750 1000 1500 volts
DC Grid Voltage
100 volts
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION | DC Grid Voltage - - - - - =100 —125 —150 volts
)1 DC Plate Current
1 mA
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION | )1 DC Plate Current - - - - - 95 100 90 mA
DC Grid Current
40 mA
PLATE MODULATED RADIO FREQUENCY TYPICAL OPERATION | DC Grid Current - - S 40 40 40 mA
DC Plate Voltage
1600 volts
MaximumRatings | DC Plate Voltage - - - - - « - - 1600 volts Driving Power (approx.) - - - 9 10 11 watts
DC Plate Current
120 mA
MaximumRatings | DC Plate Current - - - - - - - . 120 mA Plate Dissipation - - - - - 20 25 30 watts
Plate Input
70 watts
MaximumRatings | Plate Input - - - - - - - 70 100 135 watts
Plate Dissipation
33 watts
MaximumRatings | Plate Dissipation - - - - - - - - - 33 watts Plate Power Output - - - - 50 75 105 watts
Grid Dissipation
15 watts
MaximumRatings | Grid Dissipation - - - - - - - - - 15 watts “Adjust for stated zero-signal plate current.
(Revised 6-1-67) (© 1958, 1967 by Varian Printed in U.S.A
6 A
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | (Revised 6-1-67) (© 1958, 1967 by Varian Printed in U.S.A.
| { *A 5 38 5 3
5 A
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | | { *A 5 38 5 3
the relationship of plate efficiency, = IEb Enlggc? 3:?: I'S:E
3
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | the relationship of plate efficiency, = IEb Enlggc? 3:?: I'S:E
2000 volts. These charts show com- ng_ ===/ el
2000 volts
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | 2000 volts. These charts show com- ng_ ===/ el
Points A, B, and C are identical to the 50 Amal
50 A
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | Points A, B, and C are identical to the 50 Amal
1500, and 2000 volts respectively. H
1500 volts
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | 1500, and 2000 volts respectively. H
‘;h‘a-\l :s Y&? . ‘;.5 ] CURVE s W-gt
5 a
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | ‘;h‘a-\l :s Y&? . ‘;.5 ] CURVE s W-gt
— —] so|130 |1} o I A .88 1180 ;1]
130 A
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | — —] so|130 |1} o I A .88 1180 ;1]
a 78 120 | a e === :: :':: H
78 a
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | a 78 120 | a e === :: :':: H
D e Rr38W e 1o 28 Dies A —[ 70]- 70 |H
8 A
1 The performance figures listed under Typical Operation are for radio frequencies up to the VHF region and are obtained by cal- | D e Rr38W e 1o 28 Dies A —[ 70]- 70 |H

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

The EIMAC [1]
35 W
The EIMAC 35TG is a high-mu triode having a maximum plate dissipation of 50 watts. It is
The EIMAC [2]
50 W
The EIMAC 35TG is a high-mu triode having a maximum plate dissipation of 50 watts. It is
at frequencies up to loo MHz. It is basically the same as the EIMAC
35 MHz
at frequencies up to loo MHz. It is basically the same as the EIMAC 35T except that the grid
Current [1]
3.6 A
Current-------------- 3.6 4.2 amps
Current [2]
4.2 A
Current-------------- 3.6 4.2 amps
Grid-Plate------------- I [1]
25
Grid-Plate------------- I.25 2.05 pF
Grid-Plate------------- I [2]
2.05
Grid-Plate------------- I.25 2.05 pF
Grid-Filament [1]
2
Grid-Filament------------ 2.00 3.20 pF
Grid-Filament [2]
3.2
Grid-Filament------------ 2.00 3.20 pF
Plate-Filament [1]
0.1
Plate-Filament------------ 0.10 0.35 pF
Plate-Filament [2]
0.35
Plate-Filament------------ 0.10 0.35 pF
Transconductance (I b = loo rnA)
2850 mA/V
Transconductance (I b = loo rnA) -------- 2850 umhos
Frequency for Maximum Ratings
100 MHz
Frequency for Maximum Ratings --------- 100 MHz
Recommended Heat Dissipating plate connector -------------- EIMAC HR
3
Recommended Heat Dissipating plate connector -------------- EIMAC HR-3
AND MODULATOR DCplatevoltage [1]
60010001500 V
AND MODULATOR DCplatevoltage ---- 60010001500 2000 volts
AND MODULATOR DCplatevoltage [2]
2000 V
AND MODULATOR DCplatevoltage ---- 60010001500 2000 volts
DCGridvoltage (approx.)# [1]
0 V
DCGridvoltage (approx.)# 0 -8 -25 -40 volts
DCGridvoltage (approx.)# [2]
-8 V
DCGridvoltage (approx.)# 0 -8 -25 -40 volts
DCGridvoltage (approx.)# [3]
-25 V
DCGridvoltage (approx.)# 0 -8 -25 -40 volts
DCGridvoltage (approx.)# [4]
-40 V
DCGridvoltage (approx.)# 0 -8 -25 -40 volts
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current [1]
90 A
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current 90 67 45 34 rnA
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current [2]
67 A
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current 90 67 45 34 rnA
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current [3]
45 A
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current 90 67 45 34 rnA
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current [4]
34 A
Class AB ( Sinusoidal wave, two tubes unless otherwise Zero-signal DC plate current 90 67 45 34 rnA
specified ) Max-signalDCplatecurrent [1]
300 mA
specified ) Max-signalDCplatecurrent 300 240 200 167 rnA
specified ) Max-signalDCplatecurrent [2]
240 mA
specified ) Max-signalDCplatecurrent 300 240 200 167 rnA
specified ) Max-signalDCplatecurrent [3]
200 mA
specified ) Max-signalDCplatecurrent 300 240 200 167 rnA
specified ) Max-signalDCplatecurrent [4]
167 mA
specified ) Max-signalDCplatecurrent 300 240 200 167 rnA
Effective Load Plate-to-Plate [1]
4250
Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
Effective Load Plate-to-Plate [2]
7900
Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
Effective Load Plate-to-Plate [3]
16200
Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
Effective Load Plate-to-Plate [4]
27500
Effective Load Plate-to-Plate 4250 7900 16,200 27,500 ohms
DCplatevoltage [1]
2000 V
DCplatevoltage -------- 2000 volts ( per tube ) ----- 255 volts
DCplatevoltage [2]
255 V
DCplatevoltage -------- 2000 volts ( per tube ) ----- 255 volts
DCplatecurrent [1]
150 A
DCplatecurrent -------- 150 rnA Peak Driving Power (approx.) 8 watts
DCplatecurrent [2]
8 A
DCplatecurrent -------- 150 rnA Peak Driving Power (approx.) 8 watts
Plate Dissipation [1]
50 W
Plate Dissipation --------- 50 watts Nominal Driving Power (app.) 4 watts
Plate Dissipation [2]
4 W
Plate Dissipation --------- 50 watts Nominal Driving Power (app.) 4 watts
GridDissipation [1]
15 W
GridDissipation -------- 15 watts Max-signal Plate Power Output 235 watts
GridDissipation [2]
235 W
GridDissipation -------- 15 watts Max-signal Plate Power Output 235 watts
AND OSCILLATOR DCplatevoltage [1]
1000 V
AND OSCILLATOR DCplatevoltage --- 1000 1500 2000 volts
AND OSCILLATOR DCplatevoltage [2]
1500 V
AND OSCILLATOR DCplatevoltage --- 1000 1500 2000 volts
AND OSCILLATOR DCplatevoltage [3]
2000 V
AND OSCILLATOR DCplatevoltage --- 1000 1500 2000 volts
DCGridvoltage [1]
-60 V
DCGridvoltage --- -60 -120 -135 volts
DCGridvoltage [2]
-120 V
DCGridvoltage --- -60 -120 -135 volts
DCGridvoltage [3]
-135 V
DCGridvoltage --- -60 -120 -135 volts
Class-C Telegraphy or FM Telephony DCplatecurrent [1]
125 A
Class-C Telegraphy or FM Telephony DCplatecurrent --- 125 125 125 rnA
Class-C Telegraphy or FM Telephony DCplatecurrent [2]
125 A
Class-C Telegraphy or FM Telephony DCplatecurrent --- 125 125 125 rnA
Class-C Telegraphy or FM Telephony DCplatecurrent [3]
125 A
Class-C Telegraphy or FM Telephony DCplatecurrent --- 125 125 125 rnA
( Key-down conditions, per tube ) [1]
1 mA
( Key-down conditions, per tube ) 1 DCGridcurrent --- 4040 45mA