5HA7

Dissimilar twin triode, documented as electrically identical to the 4HA7 except for heater characteristics, combining low- and high-mu sections for complementary circuit functions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 12FQ
Socket code: B12C
Base pins: 12
Nominal heater: 5.8 V / 450 mA

Description

Except for heater characteristics, the 5HA7 is identical to the 4HA7; the source prints only the heater differences.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12FQ
Socket code: B12C
Base pins: 12
Nominal heater voltage: 5.8 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12FQ - 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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7700 Ω
Transconductance: 0.0022 S
Amplification factor: 17
Max plate voltage: 330 V
Max plate dissipation: 2.75 W
Max cathode current: 20 mA

Medium-mu triode section; 5HA7 is identical to 4HA7 except heater characteristics.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 62500 Ω
Transconductance: 0.0016 S
Amplification factor: 100
Max plate voltage: 330 V
Max plate dissipation: 0.3 W

High-mu triode section; ratings inherited from 4HA7 because 5HA7 is specified identical except heater characteristics.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Warmup Time
1 s