12BQ6GT

Beam-power tube for television horizontal-deflection output stages, combining 11 W plate dissipation with substantial pulse-voltage capability and controlled heater warm-up.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 6AM
Socket code: -
Base pins: 8
Nominal heater: 12.6 V / 600 mA

Description

THE PLATE IS BROUGHT OUT TO A TOP CAP FOR ISOLATION OF THE HIGH VOLTAGE AND CONVENIENCE IN A CIRCUIT LAYOUT. ITS ELECTRICAL CHARACTERISTICS ARE SUCH AS TO PROVIDE GOOD PERFORMANCE WHERE THE SUPPLY VOLTAGES ARE LIMITED. THERMAL CHARACTERISTICS OF THE HEATER HAVE BEEN CONTROLLED SUCH THAT HEATER VOLTAGE SURGES DURING THE WARM-UP CYCLE ARE MINIMIZED PROVIDED IT IS USED WITH OTHER TUBES WHICH ARE SIMILLARLY CONTROLLED. EXCEPT FOR HEATER

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6AM
Socket code: -
Base pins: 8
Nominal heater voltage: 12.6 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

6AM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Pin 1	—	NC May be omitted on some physical base variants	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN2Pin 2	—	H — Heater	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN3Pin 3	—	NC	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN4Pin 4	A	G2 — Screen Grid	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN5Pin 5	A	G1 — Control Grid	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN7Pin 7	—	H — Heater	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN8Pin 8	A	BP — Beam-Forming PlateGroup AM8	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
PIN8Pin 8	A	K — CathodeGroup AM8	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view
CAP1Top cap	A	P — Plate (Anode)	Verified 6AM manufacturer basing; 12DQ6A Tung-Sol, 6BQ6GT Sylvania/Tung-Sol; bottom view

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 18000 Ω
Transconductance: 0.006 S
Max plate voltage: 550 V
Max screen voltage: 175 V
Max plate dissipation: 11 W
Max screen dissipation: 2.5 W
Max cathode current: 110 mA

Published maximum ratings and characteristics promoted from supplied datasheet.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage
12.6 V
Nominal
Heater current
600 mA
Nominal
Plate voltage
1250 V
Typical operating conditions
Screen voltage
175 V
Typical operating conditions
Plate current
55 mA
Typical operating conditions

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

GRID #1 TO PLATE: (G1 TO P)
0.6 pF
Published datasheet
INPUT: G1 TO (H}K}G2}BP)
15 pF
Published datasheet

Characteristic

HEATER VOLTAGE
12.6 V
Published datasheet
PLATE CURRENT
55 mA
Published datasheet
GRID #2 CURRENT
2.1 mA
Published datasheet
PLATE CURRENT
225 mA
Published datasheet
GRID #2 CURRENT
25 mA
Published datasheet
GRID #i VOLTAGE (APPROX.J
-46 V
Published datasheet
Transconductance
0.0055 A/V
Published datasheet; promoted section value

Other

MAXIMUM DC PLATE SUPPLY VOLTAGE (BOOST } POWER SUPPLY)
550 V
Published datasheet
MAXIMUM PEAK POSITIVE PLATE VOLTAGE (ABSOLUTE MAXIMUM)
5 V
Published datasheet; operating column 1
MAXIMUM PEAK POSITIVE PLATE VOLTAGE (ABSOLUTE MAXIMUM)
500 V
Published datasheet; operating column 2
MAXIMUM PEAK NEGATIVE PLATE VOLTAGE
1 V
Published datasheet; operating column 1
MAXIMUM PEAK NEGATIVE PLATE VOLTAGE
250 V
Published datasheet; operating column 2
MAXIMUM PLATE DISSIPATION S
11 W
Published datasheet
MAXIMUM DC GRID #2 VOLTAGE
175 V
Published datasheet
MAXIMUM GRID !
2 W
Published datasheet; operating column 1
MAXIMUM GRID !
2.5 W
Published datasheet; operating column 2
MAXIMUM AVERAGE CATHODE CURRENT
110 mA
Published datasheet
MAXIMUM PEAK CATHODE CURRENT
400 mA
Published datasheet
MAXIMUM GRID N1 CIRCUIT RESISTANCE
0.47 Mohm
Published datasheet
HEATER WARM- UP TIME (APPROX.)"` ]
1 s
Published datasheet
PLATE RE SISTANCE
20 ohm
Published datasheet; operating column 1
PLATE RE SISTANCE
0 ohm
Published datasheet; operating column 2
CWITH Eb =
250 V
Published datasheet; operating column 1
CWITH Eb =
150 V
Published datasheet; operating column 2
CWITH Eb =
-22.5 V
Published datasheet; operating column 3
DWITN Eb =
60 V
Published datasheet; operating column 1
DWITN Eb =
150 V
Published datasheet; operating column 2
E FOR Ib =
1 V
Published datasheet; operating column 1
E FOR Ib =
250 V
Published datasheet; operating column 2
E FOR Ib =
150 V
Published datasheet; operating column 3
FWITN E b = ECp =
150 V
Published datasheet; operating column 1
FWITN E b = ECp =
-22.5 V
Published datasheet; operating column 2
Ef =
12.6 V
Published datasheet
Maximum plate voltage
550 V
Published datasheet; promoted section value
Maximum screen voltage
175 V
Published datasheet; promoted section value
Maximum plate dissipation
11 W
Published datasheet; promoted section value
Maximum screen dissipation
2.5 W
Published datasheet; promoted section value
Maximum cathode current
110 mA
Published datasheet; promoted section value