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7551

Industrial beam-power tube for Class-C RF amplification, oscillation, and frequency multiplication to approximately 175 MHz in mobile communications equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9LK
Socket code: B9A
Base pins: 9
Nominal heater: 13.5 V / 360 mA

Description

Industrial beam power tube for Class C RF amplification, oscillation, and frequency multiplication to 175 MHz in mobile communications.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9LK
Socket code: B9A
Base pins: 9
Nominal heater voltage: 13.5 V
Nominal heater current: 360 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9LK - 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

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 30000 Ω
Transconductance: 0.0053 S
Amplification factor: 8.7
Max plate voltage: 375 V
Max screen voltage: 300 V
Max plate dissipation: 12 W
Max screen dissipation: 2 W
Max cathode current: 80 mA

Published electrical section from supplied RCA data sheet.

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 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Maximum RF frequency multiplier frequency
175 MHz

Application

Service
RF frequency multiplier / AF Class AB1 amplifier
ClassAB

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
450 mA
MaximumOperatingFrequency
175 MHz
Approximate/useful limit

Data set 03

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

Heater voltage
13.5 V
Heater current
360 mA
Characteristic plate voltage
250 V
Characteristic grid2 voltage
250 V
Transconductance
5300 uS

Other

Plate voltage maximum CCS Class C
250 V
ClassC
Plate voltage maximum ICAS Class C
300 V
ClassC
Grid2 voltage maximum
250 V
Grid1 voltage minimum
-125 V
Plate dissipation maximum CCS
8 W
ClassC
Plate dissipation maximum ICAS
12 W
ClassC
Typical Class-C plate voltage
300 V
ClassC

Application

Application
RF power amplifier / frequency multiplier / AF amplifier

Data set 04

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage
13.5 V
Heater current
360 mA
Plate voltage
250 V
ClassA
Screen voltage
250 V
ClassA
Grid voltage
-18 V
ClassA
Plate current
40 mA
ClassA
Screen current
3 mA
ClassA
Maximum plate voltage
375 V
Maximum screen voltage
300 V
Maximum plate dissipation
12 W
ICAS
Push-pull power output
20.5 W
ClassAB1;TwoTubes
RF useful power output
10 W
ClassC;175MHz

Characteristic

Transconductance
5300 uS
ClassA
Screen-to-control-grid mu factor
8.7

Capacitance

Grid-to-plate capacitance
0.15 pF

Data set 05

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage nominal
13.5 V
Heater current nominal
360 mA
Voltage range
12 V
Published source row
Voltage range (value 2)
15 V
Published source row
Current at
13.5 V
Published source row
Current at (value 2)
0.36 V
Published source row
DC PLATE VOLTAGE
300 V
Published source row
DC PLATE VOLTAGE (value 2)
300 V
Published source row
DC GRID-No
2
Published source row
VOLTAGE
250 V
Published source row
VOLTAGE (value 2)
250 V
Published source row
VOLTAGE
-125 V
Published source row
VOLTAGE (value 2)
-125 V
Published source row
DC PLATE CURRENT
70 mA
Published source row
DC GRID-No
2 mA
Published source row
DC GRID-No (value 2)
15 mA
Published source row
DC GRID-No (value 3)
15 mA
Published source row
DC GRID-No.l CURRENT
5 mA
Published source row
DC GRID-No.l CURRENT (value 2)
5 mA
Published source row
GRID-No
2 W
Published source row

Characteristics

Heater Voltage
13.5 V
Published source row
Plate Voltage
250 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
250 V
Published source row
Grid-No.l Voltage
-18 V
Published source row
Mu-Factor, Grid No
2
Published source row
Mu-Factor, Grid No (value 2)
1
Published source row
Mu-Factor, Grid No (value 3)
8.7
Published source row
Transconductance
5300 µS
Published source row
Plate Current
40 mA
Published source row
Grid-No
2 mA
Published source row
Grid-No (value 2)
3 mA
Published source row
DC PLATE VOLTAGE
300 V
Published source row
DC GRID-No
2 V
Published source row
DC GRID-No (value 2)
250 V
Published source row
MAX.-SIGNAL DC PLATE CURRENTS
70 mA
Published source row
MAX.-SIGNAL GRID-No
2 W
Published source row
MAX.-SIGNAL GRID-No (value 2)
2 W
Published source row
PLATE DISSIPATION•
10 W
Published source row
Heater Voltage
13.5 V
Published source row
DC Plate Voltage
300 V
Published source row
DC Grid-No
2 V
Published source row
DC Grid-No (value 2)
250 V
Published source row
DC Grid-No.l Voltage§
-21 V
Published source row
Peak AF Grid-No.l-to-Grid-No
1 V
Published source row
Peak AF Grid-No.l-to-Grid-No (value 2)
40 V
Published source row
Zero-Signal DC Plate Current
40 mA
Published source row
Max.-Signal DC Plate Current
125 mA
Published source row
Zero-Signal DC Grid-No
2 mA
Published source row
Zero-Signal DC Grid-No (value 2)
2 mA
Published source row
Max.-Signal DC Grid-No
2 mA
Published source row
Max.-Signal DC Grid-No (value 2)
14 mA
Published source row
Effective Load Resistance (Plate to plate)
5000 ohm
Published source row
Total Harmonic Distortion
5 %
Published source row
Max.~Signal Power Output (Approx )
20.5 W
Published source row
Grid-No.l-Circuit Resistance
0 Mohm
Published source row
Grid-No.l-Circuit Resistance (value 2)
1 Mohm
Published source row

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

Grid No.1 to Plate Capacitance
0.15 pF
Maximum
Grid No.1 Input Capacitance
10 pF
Plate Output Capacitance
5.5 pF

Characteristic

Class A Plate Voltage
250 V
ClassA
Class A Screen Voltage
250 V
ClassA
Class A Plate Current
40 mA
ClassA
Class A Screen Current
3 mA
ClassA

Other

RF DC Plate Current
80 mA
ClassC;ICAS;175MHz
RF DC Screen Current
15 mA
ClassC;ICAS;175MHz
Useful Power Output
10 W
ClassC;ICAS;175MHz