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100TH

High-mu transmitting power triode for Class C RF amplification or oscillation and Class B audio/modulator service. Rated for 100 W plate dissipation, operation to about 40 MHz, and several hundred watts output under published conditions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: MEDIUM4BAYONET
Base pins: 4
Nominal heater: 5 V / 6.3 A

Description

Three-electrode transmitting tube designed for Class B audio-frequency power-amplifier/modulator and Class C radio-frequency power-amplifier or oscillator operation.

Socket description

Medium 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: MEDIUM4BAYONET
Base pins: 4
Nominal heater voltage: 5 V
Nominal heater current: 6.3 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: 0.0045 S
Amplification factor: 38
Max plate voltage: 3000 V
Max plate dissipation: 100 W
Max grid dissipation: 20 W

Published 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

The Eimac [1]
100 W
The Eimac 100TH is a high -mu powe r t riode hav ing a ma ximum plate dissipation rating of 100
The Eimac [2]
100 W
The Eimac 100TH is a high -mu powe r t riode hav ing a ma ximum plate dissipation rating of 100
C o o ling of t he
100
C o o ling of t he 100TH is accomplished by radiatio n from the plate, whi ch ope ra tes at a visible
Current
6.3 A
Current - - 6.3 amperes
Grid-P late [1]
2
Grid-P late 2 .0 /L/L f
Grid-P late [2]
0
Grid-P late 2 .0 /L/L f
Gr id-Filament
2.9
Gr id-Filament - - - - - - - - - 2.9 /L/Lf
~ Plate-Fi lament [1]
0
~ Plate-Fi lament - - - - - - - - - 0 .3 /L/Lf
~ Plate-Fi lament [2]
3
~ Plate-Fi lament - - - - - - - - - 0 .3 /L/Lf
~ Transconductance (i b= [1]
200
~ Transconductance (i b=200 ma ., Eb=3000v ., e c= -5v.) 4500/Lmhos
~ Transconductance (i b= [2]
3000
~ Transconductance (i b=200 ma ., Eb=3000v ., e c= -5v.) 4500/Lmhos
~ Transconductance (i b= [3]
-5
~ Transconductance (i b=200 ma ., Eb=3000v ., e c= -5v.) 4500/Lmhos
~ Transconductance (i b= [4]
4500
~ Transconductance (i b=200 ma ., Eb=3000v ., e c= -5v.) 4500/Lmhos
Frequency for Maximum Ratings
40 MHz
Frequency for Maximum Ratings 40Mc.
Grid Eimac HR
2
Grid Eimac HR-2
AND MODULATOR D-C Plate Voltag e [1]
1500
AND MODULATOR D-C Plate Voltag e - 1500 2000 2500 Volts
AND MODULATOR D-C Plate Voltag e [2]
2000
AND MODULATOR D-C Plate Voltag e - 1500 2000 2500 Volts
AND MODULATOR D-C Plate Voltag e [3]
2500
AND MODULATOR D-C Plate Voltag e - 1500 2000 2500 Volts
D-C Grid Voltage (approx.) * • [1]
-20 V
D-C Grid Voltage (approx.) * • -20 -3 5 -50 Volts
D-C Grid Voltage (approx.) * • [2]
-3 V
D-C Grid Voltage (approx.) * • -20 -3 5 -50 Volts
D-C Grid Voltage (approx.) * • [3]
5 V
D-C Grid Voltage (approx.) * • -20 -3 5 -50 Volts
D-C Grid Voltage (approx.) * • [4]
-50 V
D-C Grid Voltage (approx.) * • -20 -3 5 -50 Volts
Max-Sig na l D-C Plat e Current [1]
320 mA
Max-Sig na l D-C Plat e Current - 320 280 250 Ma.
Max-Sig na l D-C Plat e Current [2]
280 mA
Max-Sig na l D-C Plat e Current - 320 280 250 Ma.
Max-Sig na l D-C Plat e Current [3]
250 mA
Max-Sig na l D-C Plat e Current - 320 280 250 Ma.
Effect ive Load , Plate-to -Plate [1]
8800
Effect ive Load , Plate-to -Plate - 8800 15,000 22,000 Ohms.
Effect ive Load , Plate-to -Plate [2]
15000
Effect ive Load , Plate-to -Plate - 8800 15,000 22,000 Ohms.
Effect ive Load , Plate-to -Plate [3]
22000
Effect ive Load , Plate-to -Plate - 8800 15,000 22,000 Ohms.
D-C PLATE VOL TAG E [1]
3000
D-C PLATE VOL TAG E - 3000 MAX. VQLTS Peak A-F Grid Input Voltag e [ pe r tub e} - 145 150 155 Volts
D-C PLATE VOL TAG E [2]
145
D-C PLATE VOL TAG E - 3000 MAX. VQLTS Peak A-F Grid Input Voltag e [ pe r tub e} - 145 150 155 Volts
D-C PLATE VOL TAG E [3]
150
D-C PLATE VOL TAG E - 3000 MAX. VQLTS Peak A-F Grid Input Voltag e [ pe r tub e} - 145 150 155 Volts
D-C PLATE VOL TAG E [4]
155
D-C PLATE VOL TAG E - 3000 MAX. VQLTS Peak A-F Grid Input Voltag e [ pe r tub e} - 145 150 155 Volts
Ma x-Signal Peak Driving Power [1]
18 W
Ma x-Signal Peak Driving Power 18 19 15 Wa tt s
Ma x-Signal Peak Driving Power [2]
19 W
Ma x-Signal Peak Driving Power 18 19 15 Wa tt s
Ma x-Signal Peak Driving Power [3]
15 W
Ma x-Signal Peak Driving Power 18 19 15 Wa tt s
Max-Sig na l Nomina l Driving Power (approx.) [1]
9 W
Max-Sig na l Nomina l Driving Power (approx.) 9 9.5 7.5 Wa tts
Max-Sig na l Nomina l Driving Power (approx.) [2]
9.5 W
Max-Sig na l Nomina l Driving Power (approx.) 9 9.5 7.5 Wa tts
Max-Sig na l Nomina l Driving Power (approx.) [3]
7.5 W
Max-Sig na l Nomina l Driving Power (approx.) 9 9.5 7.5 Wa tts
Max- Sig nal Plat e Power O utput [1]
280 W
Max- Sig nal Plat e Power O utput - - 280 360 425 Watts
Max- Sig nal Plat e Power O utput [2]
360 W
Max- Sig nal Plat e Power O utput - - 280 360 425 Watts
Max- Sig nal Plat e Power O utput [3]
425 W
Max- Sig nal Plat e Power O utput - - 280 360 425 Watts
PLATE DISSIPATIO N, PER TUBE
100
PLATE DISSIPATIO N, PER TUBE - 100 MAX. W ATTS 'Ad just to give stated ze ro signa l p la te c urre nt .
AND OSCILLATOR D-C Plate Volt ag e [1]
1500
AND OSCILLATOR D-C Plate Volt ag e - 1500 2000 3000 Volts
AND OSCILLATOR D-C Plate Volt ag e [2]
2000
AND OSCILLATOR D-C Plate Volt ag e - 1500 2000 3000 Volts
AND OSCILLATOR D-C Plate Volt ag e [3]
3000
AND OSCILLATOR D-C Plate Volt ag e - 1500 2000 3000 Volts
D-C Grid C urr ent [1]
48
D-C Grid C urr ent - 48 39 51 Ma.
D-C Grid C urr ent [2]
39
D-C Grid C urr ent - 48 39 51 Ma.
D-C Grid C urr ent [3]
51
D-C Grid C urr ent - 48 39 51 Ma.
D-C PLATE VOLTAGE [1]
3000 V
D-C PLATE VOLTAGE 3000 MAX. VOLTS Driving Powe r [approx.) 10 8 18 Watts
D-C PLATE VOLTAGE [2]
10 V
D-C PLATE VOLTAGE 3000 MAX. VOLTS Driving Powe r [approx.) 10 8 18 Watts
D-C PLATE VOLTAGE [3]
8 V
D-C PLATE VOLTAGE 3000 MAX. VOLTS Driving Powe r [approx.) 10 8 18 Watts
D-C PLATE VOLTAGE [4]
18 V
D-C PLATE VOLTAGE 3000 MAX. VOLTS Driving Powe r [approx.) 10 8 18 Watts
Grid Dissipa tion [1]
7
Grid Dissipa tion 7 5 10 W att s
Grid Dissipa tion [2]
5
Grid Dissipa tion 7 5 10 W att s
Grid Dissipa tion [3]
10
Grid Dissipa tion 7 5 10 W att s
D-C PLATE CURRENT
225 mA
D-C PLATE CURRENT 225 MA X. MA.
Plate Power Inpu t • [1]
285 W
Plate Power Inpu t • 285 335 500 Watts
Plate Power Inpu t • [2]
335 W
Plate Power Inpu t • 285 335 500 Watts
Plate Power Inpu t • [3]
500 W
Plate Power Inpu t • 285 335 500 Watts
PLATE DISSIPATION [1]
100 W
PLATE DISSIPATION 100 MAX. WATTS Plat e Dissipa tion 100 100 100 W att s
PLATE DISSIPATION [2]
100 W
PLATE DISSIPATION 100 MAX. WATTS Plat e Dissipa tion 100 100 100 W att s
PLATE DISSIPATION [3]
100 W
PLATE DISSIPATION 100 MAX. WATTS Plat e Dissipa tion 100 100 100 W att s
PLATE DISSIPATION [4]
100 W
PLATE DISSIPATION 100 MAX. WATTS Plat e Dissipa tion 100 100 100 W att s
~ GRID DISSIPATION [1]
20 W
~ GRID DISSIPATION 20 MAX. W ATTS Plate Power Output - 185 235 400 Wa tt s
~ GRID DISSIPATION [2]
185 W
~ GRID DISSIPATION 20 MAX. W ATTS Plate Power Output - 185 235 400 Wa tt s
~ GRID DISSIPATION [3]
235 W
~ GRID DISSIPATION 20 MAX. W ATTS Plate Power Output - 185 235 400 Wa tt s
~ GRID DISSIPATION [4]
400 W
~ GRID DISSIPATION 20 MAX. W ATTS Plate Power Output - 185 235 400 Wa tt s
D-C Plate Voltag e [1]
1500
D-C Plate Voltag e 1500 2000 2500 Volts
D-C Plate Voltag e [2]
2000
D-C Plate Voltag e 1500 2000 2500 Volts
D-C Plate Voltag e [3]
2500
D-C Plate Voltag e 1500 2000 2500 Volts
AMPLIFIER D-C Grid Voltage [1]
150 V
AMPLIFIER D-C Grid Voltage - - 150 -200 -250 Volts
AMPLIFIER D-C Grid Voltage [2]
-200 V
AMPLIFIER D-C Grid Voltage - - 150 -200 -250 Volts
AMPLIFIER D-C Grid Voltage [3]
-250 V
AMPLIFIER D-C Grid Voltage - - 150 -200 -250 Volts
Class-C Telephony (Carri er conditions, per t ube ) D-C Plat e Current - IbO [1]
150 mA
Class-C Telephony (Carri er conditions, per t ube ) D-C Plat e Current - IbO 150 140 Ma.
Class-C Telephony (Carri er conditions, per t ube ) D-C Plat e Current - IbO [2]
140 mA
Class-C Telephony (Carri er conditions, per t ube ) D-C Plat e Current - IbO 150 140 Ma.
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage [1]
325 V
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage 325 375 425 Volts
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage [2]
375 V
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage 325 375 425 Volts
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage [3]
425 V
MAXIMUM' RATINGS Peak R-F Gr id Input Voltage 325 375 425 Volts
D-C PLATE VO LTAGE [1]
2500 W
D-C PLATE VO LTAGE 2500 MAX. VO LTS Driving Power (approx.) 15 15.5 17 Wa tts
D-C PLATE VO LTAGE [2]
15 W
D-C PLATE VO LTAGE 2500 MAX. VO LTS Driving Power (approx.) 15 15.5 17 Wa tts
D-C PLATE VO LTAGE [3]
15.5 W
D-C PLATE VO LTAGE 2500 MAX. VO LTS Driving Power (approx.) 15 15.5 17 Wa tts
D-C PLATE VO LTAGE [4]
17 W
D-C PLATE VO LTAGE 2500 MAX. VO LTS Driving Power (approx.) 15 15.5 17 Wa tts
Grid Dissipation [1]
8 W
Grid Dissipation 8 7.3 7 W atts
Grid Dissipation [2]
7.3 W
Grid Dissipation 8 7.3 7 W atts
Grid Dissipation [3]
7 W
Grid Dissipation 8 7.3 7 W atts
D-C PLATE CURRE NT
180
D-C PLATE CURRE NT - 180 MAX. MA.
Plat e Power Input [1]
240 W
Plat e Power Input - 240 300 350 Watts

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum operating plate voltage
3000 V
ClassC
Typical operating plate voltage
2000 V
ClassC

Data set 03

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid-Plate Capacitance
2 pF
Grid-Filament Capacitance
2.9 pF
Plate-Filament Capacitance
0.3 pF

Other

Maximum Frequency for Full Ratings
40 MHz
Maximum DC Plate Current
225 mA
RF/AF
RF Typical Plate Voltage
3000 V
ClassC
RF Typical Plate Power Output
400 W
ClassC
AF Typical Plate Voltage
2500 V
ClassAB;TwoTubes
AF Typical Plate Power Output
425 W
ClassAB;TwoTubes
Plate-Modulated Maximum Plate Voltage
2500 V
ClassC;Telephony
Plate-Modulated Maximum Plate Current
180 mA
ClassC;Telephony