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Power - Beam (NOT sweep) ·BeamPower-Rectifier

117L7GT

117 V line-operated combination tube containing a rectifier and beam-power audio output section, intended for transformerless radio and related consumer equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8A0
Socket code
-
Base pins
8
Nominal heater
117 V / 90 mA

Description

Combines a half-wave rectifier and beam power amplifier in the same envelope for AC-DC service from a 117-volt line, including three-way portable receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8A0
Socket code
-
Base pins
8
Nominal heater voltage
117 V
Nominal heater current
90 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8A0 - 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
350 V
Rectifier nominal output current
75 mA
Rectifier peak forward current
450 mA
Rectifier max heater-cathode voltage
175 V

Section 2

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
13000 Ω
Transconductance
0.0053 S
Max plate voltage
117 V
Max screen voltage
117 V
Max plate dissipation
6 W
Max screen dissipation
1 W

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

Rectifier

Characteristic

  • Average Characteristics Nz Volts

    90 mA

  • Limits Of Supplied Voltage N7£

    12 V

  • Maximum Dc Heater-Cathode Voltage

    175 V

Other

  • Peak Inverse Voltage

    350 V

  • Steady-State Peak Plate Current

    450 mA

  • Ef =

    117 V

  • Einput =

    117 V

SECTION 2

Beam Power

Other

  • Plate Diss{Pation

    6 W

  • E¢ =

    117 V

  • ¢ =

    117 V

  • = E., =

    105 V

  • E Egjg =

    3.67 V