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6247WA

Ruggedized subminiature high-mu triode of the 6247 family for voltage-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SUBMINIATURE8
Base pins: -
Nominal heater: 6.3 V / 200 mA

Description

Reliable subminiature high-mu triode engineered for very low microphonic response in specialized military voltage-amplifier equipment under severe shock or vibration.

Socket description

Subminiature 8-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SUBMINIATURE8
Base pins: -
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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.00265 S
Amplification factor: 60
Max plate voltage: 275 V
Max plate dissipation: 1.25 W
Max cathode current: 6.5 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

Triode

Characteristics

Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
200 mA
Published nominal or representative value
Transconductance
2650 µS
Published characteristic

Other

Maximum plate dissipation
1.25 W
Published maximum rating