12JB6

A nine-pin Novar beam-power pentode designed for television horizontal-deflection output service. Its 12.6-volt, 600-milliampere heater features controlled warm-up, while the tube provides substantial peak pulse-voltage capability, high cathode-current capacity, and a top-cap plate connection for sweep-circuit applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9QL
Socket code: -
Base pins: 9
Nominal heater: 12.6 V / 600 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9QL
Socket code: -
Base pins: 9
Nominal heater voltage: 12.6 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9QL - 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: 15000 Ω
Transconductance: 0.0071 S
Amplification factor: 4.4
Max plate voltage: 770 V
Max screen voltage: 220 V
Max plate dissipation: 17.5 W
Max screen dissipation: 3.5 W
Max cathode current: 550 mA

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

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Plate Voltage
250 V
Screen Voltage
150 V
Grid Voltage
-22.5 V
Plate Current
70 mA
Screen Current
2.1 mA
Grid To Plate Capacitance
0.2 pF
Input Capacitance
15 pF
Output Capacitance
6 pF
Peak positive pulse plate voltage
6500 V
peak positive plate pulse; Sylvania 1970
Peak negative pulse plate voltage
-1500 V
peak negative plate pulse; Sylvania 1970
Average cathode current
175 mA
average cathode maximum; Sylvania 1970
Peak cathode current
550 mA
peak cathode maximum; Sylvania 1970
Heater warm-up time
11 s
heater warm-up; Sylvania 1970
Grid #1 voltage
-42 V
grid cutoff Ib=1mA; Sylvania 1970
Plate voltage
60 V
knee Eb with Ec2=150 and Ec1=0; Sylvania 1970
Plate current
390 mA
knee plate current; Sylvania 1970
Grid #2 current
32 mA
knee screen current; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
heater negative maximum total DC and peak; Sylvania 1970
Peak Heater-Cathode Voltage
100 V
heater positive maximum DC; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
heater positive maximum total DC and peak; Sylvania 1970