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Voltage Pentode - Remote Cutoff (single) ·Pentode

R126F

Long-life variable-gain voltage-amplifier pentode for professional telecommunications and industrial signal-control applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 18 V / 225 mA

Description

Long-life variable-gain voltage-amplifier pentode.

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: 18 V
Nominal heater current: 225 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: 1000000 Ω
Transconductance: 0.0017 S
Max plate voltage: 225 V
Max screen voltage: 225 V
Max plate dissipation: 2 W
Max screen dissipation: 0.5 W
Max cathode current: 12 mA

Pentode section; promoted values are taken from the approved source where explicitly published.

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

1953 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Resistance entre filament et cathode
0 ohm
Pentode
Heater-cathode voltage
50 V
Pentode
Plate voltage
200 V
Pentode
Suppressor-grid voltage
0 V
Pentode
Plate current
6 mA
Pentode
Screen-grid current
13 mA
Pentode
Transconductance
1.7 mA/V
Pentode
Plate voltage
225 V
Pentode
Screen-grid voltage
225 V
Pentode
Plate dissipation
2 W
Pentode
Screen-grid dissipation
5 W
Pentode
Cathode current
12 mA
Pentode

Capacitance

Input capacitance
85 pF
Pentode
Output capacitance
10 pF
Pentode
Coupling capacitance
0.02 pF
Pentode
Input capacitance
10 pF
Pentode