5751W1

Ruggedized special-quality 5751-family high-mu twin triode intended for reliable low-level voltage amplification in severe-service military and professional equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 12.6 V / 175 mA

Description

The 5751W1 is the high-reliability military version of the 5751 high-mu twin triode, retaining the same electrical characteristics while adding reliability-oriented qualification.

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: 9
Nominal heater voltage: 12.6 V
Nominal heater current: 175 mA
Parallel heater voltage: 6.3 V
Parallel heater current: 350 mA
Series capable: Yes

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: 58000 Ω
Transconductance: 0.0012 S
Amplification factor: 70
Max plate voltage: 330 V
Max plate dissipation: 0.8 W
Max cathode current: 22 mA
Rectifier max heater-cathode voltage: 100 V

Representative row for two identical triode sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 58000 Ω
Transconductance: 0.0012 S
Amplification factor: 70
Max plate voltage: 330 V
Max plate dissipation: 0.8 W
Max cathode current: 22 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

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Grid-to-plate capacitance each section
1.4 pF
WholeTube
Input capacitance
1.4 pF
WholeTube
Output capacitance section 1
0.7 pF
WholeTube
Output capacitance section 2
0.36 pF
WholeTube

Other

Maximum plate voltage
330 V
WholeTube
Maximum plate dissipation each section
0.8 W
WholeTube
Plate voltage
100 V
100VPoint
Grid bias voltage
-1 V
100VPoint
Amplification factor
70
100VPoint
Plate resistance
58000 ohm
100VPoint
Transconductance
1200 µS
100VPoint
Plate current
0.8 mA
100VPoint
Plate voltage
250 V
250VPoint
Grid bias voltage
-3 V
250VPoint
Amplification factor
70
250VPoint
Plate resistance
58000 ohm
250VPoint
Transconductance
1200 µS
250VPoint
Plate current
1 mA
250VPoint