6245

Ruggedized subminiature UHF pentode designed for high-frequency signal service under demanding conditions. Its compact construction combines ultra-high-frequency capability with mechanical ruggedization for equipment requiring both small size and environmental durability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 200 mA

Description

Ruggedized subminiature UHF pentode.

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: 6.3 V
Nominal heater current: 200 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: 150000 Ω
Transconductance: 0.005 S
Max plate voltage: 200 V
Max screen voltage: 155 V
Max plate dissipation: 1.85 W
Max screen dissipation: 0.55 W
Max cathode current: 20 mA

Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed where applicable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
200 mA
Published nominal or representative value
Transconductance
5000 µS
Published characteristic

Other

Maximum plate dissipation
1.85 W
Published maximum rating

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Nominal
Heater current
200 mA
Nominal

Data set 03

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater/filament voltage
6.3 V
Heater/filament current
200 mA
Maximum impact acceleration
450 G
Ruggedized
Maximum uniform acceleration
1000 G
Ruggedized
Maximum vibrational acceleration
2.5 G
Ruggedized

Application

Application summary
Ruggedized subminiature UHF pentode.

Characteristic

Plate voltage
120 V
Screen voltage
120 V
Plate current
7.5 mA
Transconductance
5000 uS
Grid-to-plate capacitance
0.02 pF
Input capacitance
4.2 pF