5608

Medium-mu double triode intended for AC plate-voltage amplifier circuits and applications having critical grid-leakage requirements, emphasizing controlled leakage behavior for demanding amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 2.5 V / 2 A

Description

Medium-mu double-triode amplifier for AC plate-voltage amplifiers and circuits with critical grid-leakage requirements.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: -
Nominal heater voltage: 2.5 V
Nominal heater current: 2 A
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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 13000 Ω
Transconductance: 0.00245 S
Amplification factor: 32
Max plate voltage: 350 V
Max plate dissipation: 5.5 W
Max cathode current: 20 mA

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

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 13000 Ω
Transconductance: 0.00245 S
Amplification factor: 32
Max plate voltage: 350 V
Max plate dissipation: 5.5 W
Max cathode current: 20 mA

Second identical physical triode section; added to align rows with SectionCount.

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
2.5 V
Published nominal value
Heater or filament current
2 A
Published nominal value
Transconductance
2450 µS
Published characteristic

Other

Maximum plate dissipation
5.5 W
Published maximum rating