1H33

Extremely low-consumption directly heated pentagrid mixer-oscillator for battery-powered radios. Its very low filament current minimizes battery drain while the multi-grid structure performs local oscillation and frequency conversion.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 1.4 V / 25 mA

Description

Directly heated variable-mu heptode for mixer and frequency-converter service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
Base pins: 7
Nominal heater voltage: 1.4 V
Nominal heater current: 25 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

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

Heptode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0003 S
Max plate voltage: 90 V
Max screen voltage: 67.5 V
Max plate dissipation: 0.15 W
Max cathode current: 5.5 mA

Published ratings and characteristics promoted from the approved TESLA source.

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

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

Plate Current
1.37 mA
Plate 90 V; screen grids 67.5 V

Other

Conversion Transconductance
300 µS
Plate 90 V; screen grids 67.5 V

Data set 02

1969 Tesla Manual of Electronic Tubes

Published operating points and test conditions from this source.

SECTION 1

Heptode

Application

Application
MixerFrequencyConverter text