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Power - TV Horizontal Output (sweep) ·BeamPower-DamperDiode

12HE7

A 12-pin Compactron combining a beam-power pentode horizontal-deflection amplifier and high-perveance damper diode in one envelope. Designed for television sweep applications, it uses a 12.6-volt, 1.35-ampere heater and provides high-voltage pulse handling with separate output and energy-recovery sections.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
12FS
Socket code
-
Base pins
12
Nominal heater
12.6 V / 1.35 A

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12FS
Socket code
-
Base pins
12
Nominal heater voltage
12.6 V
Nominal heater current
1.35 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12FS - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
6200 Ω
Transconductance
0.0088 S
Amplification factor
4.2
Max plate voltage
500 V
Max screen voltage
150 V
Max plate dissipation
10 W
Max screen dissipation
3.5 W
Max cathode current
800 mA

Section 2

DamperDiode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
4200 V
Rectifier nominal output current
200 mA
Rectifier peak forward current
1.2 A
Rectifier forward voltage drop
21 V

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

    130 V

  • Screen Voltage

    130 V

  • Grid Voltage

    -22 V

  • Plate Current

    60 mA

  • Screen Current

    2.8 mA

  • Grid To Plate Capacitance

    0.38 pF

  • Input Capacitance

    19 pF

  • Output Capacitance

    8 pF

  • Peak positive pulse plate voltage

    5000 V

    peak positive plate pulse; Sylvania 1970

  • Peak negative pulse plate voltage

    0 V

    peak negative plate pulse; Sylvania 1970

  • Average cathode current

    230 mA

    DC cathode current maximum; Sylvania 1970

  • Peak cathode current

    800 mA

    peak cathode current; Sylvania 1970

  • Plate current

    60 mA

    typical plate current at Eb130 Ec2 130 Ec1 -22; Sylvania 1970

  • Grid #2 current

    2.8 mA

    typical screen current; Sylvania 1970

  • Grid #1 voltage

    -39 V

    cutoff at Ib 1mA; Sylvania 1970

  • Peak Heater-Cathode Voltage

    200 V

    pentode heater negative total DC+peak; Sylvania 1970

  • Peak Heater-Cathode Voltage

    100 V

    pentode heater positive DC; Sylvania 1970

  • Peak Heater-Cathode Voltage

    200 V

    pentode heater positive DC+peak; Sylvania 1970

Capacitance

  • Grid-to-plate capacitance

    0.38 pF

    grid-to-plate unshielded; Sylvania 1970

  • Input capacitance

    19 pF

    input unshielded; Sylvania 1970

  • Output capacitance

    8 pF

    output unshielded; Sylvania 1970

SECTION 2

DamperDiode

Other

  • Tube Voltage Drop

    21 V

    DC diode current 250 mA

  • Peak Cathode Current

    1200 mA

    damper steady-state peak plate current; Sylvania 1970

  • Average cathode current

    200 mA

    damper DC output current; Sylvania 1970

  • Peak Heater-Cathode Voltage

    4200 V

    diode heater negative total DC+peak; Sylvania 1970

  • Peak Heater-Cathode Voltage

    500 V

    diode heater negative DC; Sylvania 1970

  • Peak Heater-Cathode Voltage

    100 V

    diode heater positive DC; Sylvania 1970

  • Peak Heater-Cathode Voltage

    200 V

    diode heater positive DC+peak; Sylvania 1970

Capacitance

  • Grid-to-plate capacitance

    8 pF

    diode cathode-to-plate and heater capacitance; Sylvania 1970

  • Output capacitance

    7 pF

    diode plate-to-cathode and heater capacitance; Sylvania 1970

  • Input capacitance

    1.6 pF

    diode heater-to-cathode capacitance; Sylvania 1970

Characteristics

  • Tube voltage drop

    21 V

    Diode tube voltage drop at DC plate current 250 mA; Sylvania 1970