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465A

Fast-heating thoriated-tungsten transmitting tetrode designed for mobile RF service. Its rapid warm-up supports radio-frequency power equipment requiring quick availability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SEPTAR5
Base pins: 5
Nominal heater: 6 V / 3.5 A

Description

Fast-heating thoriated-tungsten transmitting tetrode for mobile RF service.

Socket description

Septar 5-contact transmitting-tube base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SEPTAR5
Base pins: 5
Nominal heater voltage: 6 V
Nominal heater current: 3.5 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

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.004 S
Amplification factor: 6
Max plate voltage: 3000 V
Max screen voltage: 600 V
Max plate dissipation: 65 W
Max screen dissipation: 10 W
Max grid dissipation: 5 W
Max cathode current: 150 mA

Promoted maximum ratings/characteristics populated from published headings; service-specific values retained in 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

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Maximum full-rating frequency
50 MHz
Reduced-rating frequency
250 MHz

Data set 02

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

dissipation rating of
65 W
dissipation rating of 65 watts. In most applications, no forced air is required, normal
and permitting the conservation of power during standby periods. The [1]
8165
and permitting the conservation of power during standby periods. The 8165/4-65A is,
and permitting the conservation of power during standby periods. The [2]
4
and permitting the conservation of power during standby periods. The 8165/4-65A is,
and permitting the conservation of power during standby periods. The [3]
-65
and permitting the conservation of power during standby periods. The 8165/4-65A is,
Voltage
6 V
Voltage - - - - - - - - - - 6.0 volts
Current [1]
3.2 A
Current - - - - - - - - - 3.2 3.8 amperes
Current [2]
3.8 A
Current - - - - - - - - - 3.2 3.8 amperes
Grid-Screen Amplification Factor [1]
5
Grid-Screen Amplification Factor - - - - - . 5 7
Grid-Screen Amplification Factor [2]
7
Grid-Screen Amplification Factor - - - - - . 5 7
Input [1]
6 pF
Input - - - - - - - - - 6.0 8.3 uuf
Input [2]
8.3 pF
Input - - - - - - - - - 6.0 8.3 uuf
Output [1]
1.9 pF
Output - - - - - - - - - 1.9 2.6 uuf
Output [2]
2.6 pF
Output - - - - - - - - - 1.9 2.6 uuf
Frequency for Maximum Ratings
150
Frequency for Maximum Ratings - - - - - - - - - 150 me
RADIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION (Frequencies up to
150 MHz
RADIO-FREQUENCY POWER AMPLIFIER TYPICAL OPERATION (Frequencies up to 150 megacycles)
Telegraphy or FM Telephony Voltage [1]
-105
Telegraphy or FM Telephony Voltage - - - -—105 —105 ~105
Telegraphy or FM Telephony Voltage [2]
-105
Telegraphy or FM Telephony Voltage - - - -—105 —105 ~105
Telegraphy or FM Telephony Voltage [3]
105
Telegraphy or FM Telephony Voltage - - - -—105 —105 ~105
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o5 [1]
0 mA
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o500 137 124 112 ma
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o5 [2]
137 mA
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o500 137 124 112 ma
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o5 [3]
124 mA
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o500 137 124 112 ma
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o5 [4]
112 mA
MAXIMUM RATINGS {Key-down conditions) D-C Plate Current - - - o500 137 124 112 ma
D-C PLATE VOLTAGE [1]
3000 V
D-C PLATE VOLTAGE - - - - 3000 MAX. VOLTS D-C Screen Current* - - - ¥ 3 2% nma
D-C PLATE VOLTAGE [2]
3 V
D-C PLATE VOLTAGE - - - - 3000 MAX. VOLTS D-C Screen Current* - - - ¥ 3 2% nma
D-C PLATE VOLTAGE [3]
2 V
D-C PLATE VOLTAGE - - - - 3000 MAX. VOLTS D-C Screen Current* - - - ¥ 3 2% nma
D-C SCREEN VOLTAGE [1]
400 mA
D-C SCREEN VOLTAGE - - - 400 MAX. YOLTS D-C Grid Current* - - - . 19 15 13 9 ma
D-C SCREEN VOLTAGE [2]
19 mA
D-C SCREEN VOLTAGE - - - 400 MAX. YOLTS D-C Grid Current* - - - . 19 15 13 9 ma
D-C SCREEN VOLTAGE [3]
15 mA
D-C SCREEN VOLTAGE - - - 400 MAX. YOLTS D-C Grid Current* - - - . 19 15 13 9 ma
D-C SCREEN VOLTAGE [4]
13 mA
D-C SCREEN VOLTAGE - - - 400 MAX. YOLTS D-C Grid Current* - - - . 19 15 13 9 ma
D-C SCREEN VOLTAGE [5]
9 mA
D-C SCREEN VOLTAGE - - - 400 MAX. YOLTS D-C Grid Current* - - - . 19 15 13 9 ma
D-C GRID VOLTAGE [1]
-500 V
D-C GRID VOLTAGE - - - —500 MAX. YOLTS Peak R-F Grid Voltage* - - - 205 195 185 175 volts
D-C GRID VOLTAGE [2]
205 V
D-C GRID VOLTAGE - - - —500 MAX. YOLTS Peak R-F Grid Voltage* - - - 205 195 185 175 volts
D-C GRID VOLTAGE [3]
195 V
D-C GRID VOLTAGE - - - —500 MAX. YOLTS Peak R-F Grid Voltage* - - - 205 195 185 175 volts
D-C GRID VOLTAGE [4]
185 V
D-C GRID VOLTAGE - - - —500 MAX. YOLTS Peak R-F Grid Voltage* - - - 205 195 185 175 volts
D-C GRID VOLTAGE [5]
175 V
D-C GRID VOLTAGE - - - —500 MAX. YOLTS Peak R-F Grid Voltage* - - - 205 195 185 175 volts
D-C PLATE CURRENT - - w [1]
150 mA
D-C PLATE CURRENT - - w . 150 MAX. MA Driving Power* - - - - - 39 29 24 1.6 watts
D-C PLATE CURRENT - - w [2]
39 mA
D-C PLATE CURRENT - - w . 150 MAX. MA Driving Power* - - - - - 39 29 24 1.6 watts
D-C PLATE CURRENT - - w [3]
29 mA
D-C PLATE CURRENT - - w . 150 MAX. MA Driving Power* - - - - - 39 29 24 1.6 watts
D-C PLATE CURRENT - - w [4]
24 mA
D-C PLATE CURRENT - - w . 150 MAX. MA Driving Power* - - - - - 39 29 24 1.6 watts
D-C PLATE CURRENT - - w [5]
1.6 mA
D-C PLATE CURRENT - - w . 150 MAX. MA Driving Power* - - - - - 39 29 24 1.6 watts
PLATE DISSIPATION - - - . & [1]
5 W
PLATE DISSIPATION - - - . &5 MAX. WATTS Plate Input Power - - . - 205 275 310 335 watts
PLATE DISSIPATION - - - . & [2]
205 W
PLATE DISSIPATION - - - . &5 MAX. WATTS Plate Input Power - - . - 205 275 310 335 watts
PLATE DISSIPATION - - - . & [3]
275 W
PLATE DISSIPATION - - - . &5 MAX. WATTS Plate Input Power - - . - 205 275 310 335 watts
PLATE DISSIPATION - - - . & [4]
310 W
PLATE DISSIPATION - - - . &5 MAX. WATTS Plate Input Power - - . - 205 275 310 335 watts
PLATE DISSIPATION - - - . & [5]
335 W
PLATE DISSIPATION - - - . &5 MAX. WATTS Plate Input Power - - . - 205 275 310 335 watts
SCREEN DISSIPATION - - N [1]
10 W
SCREEN DISSIPATION - - N . 10 MAX. WATTS Plate Output Power - - - . 140 210 245 270 watts
SCREEN DISSIPATION - - N [2]
140 W
SCREEN DISSIPATION - - N . 10 MAX. WATTS Plate Output Power - - - . 140 210 245 270 watts
SCREEN DISSIPATION - - N [3]
210 W
SCREEN DISSIPATION - - N . 10 MAX. WATTS Plate Output Power - - - . 140 210 245 270 watts
SCREEN DISSIPATION - - N [4]
245 W
SCREEN DISSIPATION - - N . 10 MAX. WATTS Plate Output Power - - - . 140 210 245 270 watts
SCREEN DISSIPATION - - N [5]
270 W
SCREEN DISSIPATION - - N . 10 MAX. WATTS Plate Output Power - - - . 140 210 245 270 watts
GRID DISSIPATION
5 W
GRID DISSIPATION - - - - 5 MAX. WATTS *Approximate values
PLATE.MODULATED RADIO.FREQUENCY TYPICAL OPERATION (Frequencies up to
150 MHz
PLATE.MODULATED RADIO.FREQUENCY TYPICAL OPERATION (Frequencies up to 150 megacycles)
AMPLIEIER D-C Plate Voltage [1]
1000 V
AMPLIEIER D-C Plate Voltage - - - - 1000 1500 2000 2500 volts
AMPLIEIER D-C Plate Voltage [2]
1500 V
AMPLIEIER D-C Plate Voltage - - - - 1000 1500 2000 2500 volts
AMPLIEIER D-C Plate Voltage [3]
2000 V
AMPLIEIER D-C Plate Voltage - - - - 1000 1500 2000 2500 volts

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
3000 V
RFPowerAmplifier
Plate current
115 mA
RFPowerAmplifier
Power output
280 W
RFPowerAmplifier
Control-grid voltage
-100 V
RFPowerAmplifier
Grid current
5 mA
RFPowerAmplifier
Screen voltage
400 V
RFPowerAmplifier
Maximum frequency at full input
150 MHz
RFPowerAmplifier

Capacitance

Grid-to-plate capacitance
0.08 pF
Section1
Output capacitance
2.1 pF
Section1

Data set 04

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater/filament voltage
6 V
Heater/filament current
3.5 A
Amplification factor
5
Transconductance
4000 uS

Capacitance

Input/grid-cathode capacitance
8 pF
Output/plate-cathode capacitance
2.1 pF
Feedback/grid-plate capacitance
0.08 pF

Other

Maximum plate voltage
3000 V
Maximum screen voltage
600 V
Maximum plate dissipation
65 W
Maximum screen dissipation
10 W
Maximum grid dissipation
5 W
Maximum plate/cathode current
150 mA
Frequency for maximum ratings
110 MHz
SSB maximum plate voltage
2500 V
SSB
SSB maximum plate current
120 mA
SSB
Typical screen voltage
250 V

Data set 05

1965 Penta Labs Power Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater/filament voltage
6 V
Heater/filament current
3.5 A
Amplification factor
5
Transconductance
4000 uS
Quick-heating filament
Yes

Other

Maximum plate voltage
3000 V
Maximum screen voltage
600 V
Maximum plate dissipation
65 W
Maximum control-grid dissipation
5 W
Source language
English
Maximum frequency at full input
150 MHz

Capacitance

Grid-plate capacitance
0.08 pF
Input capacitance
7.5 pF
Output capacitance
2.2 pF

Application

Primary application
Quick-heating 65 W power tetrode for RF/audio amplifier and modulator service.

Construction

Cooling
Radiation/convection or source-specific
Electrode structure
Tetrode