1F34

Directly heated variable-mu pentode intended for RF and IF amplification. The variable-mu characteristic permits controlled receiver gain, while its filamentary construction supports compact low-power signal equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: -
Nominal heater: 1.2 V / 30 mA

Description

Directly heated variable-mu pentode for RF and IF amplification.

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: -
Nominal heater voltage: 1.2 V
Nominal heater current: 30 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 250000 Ω
Transconductance: 0.00075 S
Amplification factor: 400
Max plate voltage: 90 V
Max screen voltage: 67.5 V
Max plate dissipation: 0.35 W
Max screen dissipation: 0.11 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

Pentode

Characteristic

Plate Current
3.5 mA
Plate 90 V; Screen 67.5 V
Input Capacitance
4.2 pF
Output Capacitance
7.5 pF

Data set 02

1969 Tesla Manual of Electronic Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Application

Application
RF_IF_Amplifier text