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Z759

High-slope short-base pentode designed for video and wide-band amplification. Marconi documentation identifies it as a broadband signal tube for circuits requiring high transconductance and substantial frequency response.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 600 mA

Description

High-slope short-base pentode for video and wide-band amplification.

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: 6.3 V
Nominal heater current: 600 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: 500000 Ω
Transconductance: 0.015 S
Max plate voltage: 300 V
Max screen voltage: 250 V
Max plate dissipation: 5 W
Max screen dissipation: 1.5 W

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater/Filament Voltage
6.3 V
Heater/Filament Current
600 mA
Transconductance
15000 uS
Plate Resistance
500000 ohm

Other

Maximum/Published Anode Voltage
300 V
Maximum/Published Screen Voltage
250 V
Maximum Anode Dissipation
5 W
Maximum Screen Dissipation
1.5 W

Capacitance

Grid-Anode Capacitance
0.007 pF
Input Capacitance
13 pF
Output Capacitance
25 pF