Alternatives & variations Download PDF datasheet

7475

Cold-cathode gas-discharge voltage regulator for heaterless shunt stabilization or reference service in electronic power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: A25.5-XIX
Socket code: B4
Base pins: -
Nominal heater: -

Description

The Mullard 7475 is a neon-filled voltage-stabilising tube with a 90-110 V burning range.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: A25.5-XIX
Socket code: B4
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

A25.5-XIX - 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

Voltage Regulator

X-ray radiationInterelectrode capacitances

Regulator voltage: 95 V
Regulator minimum current: 1 mA
Regulator maximum current: 8 mA
Regulator starting voltage: 140 V
Regulator maintaining voltage: 95 V
Regulator dynamic impedance: 300 Ω

Cold-cathode gas-filled Philips voltage stabilizer/reference tube.

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 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

Running voltage minimum
90 V
VoltageRegulator
Running voltage maximum
110 V
VoltageRegulator
Striking voltage minimum
100 V
VoltageRegulator
Striking voltage maximum
135 V
VoltageRegulator
Extinction voltage minimum
85 V
VoltageRegulator
Extinction voltage maximum
110 V
VoltageRegulator
Lower stabilization current
1 mA
VoltageRegulator
AC resistance
300 Ω
VoltageRegulator

Other

Quiescent current
4 mA
VoltageRegulator
Maximum permissible current
8 mA
VoltageRegulator

Data set 02

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristics

Burning Voltage Minimum
90 V
Burning Voltage Maximum
110 V

Other

Quiescent Current
4 mA

Data set 03

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristics

Maintaining/Reference Voltage
95 V

Other

Minimum Current
1 mA
Maximum Current
8 mA
Ignition Voltage Maximum
140 V

Data set 04

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristic

Maintaining voltage at 4 mA
95 V
Voltage regulation
- to 8 V
Ia=1-8mA

Data set 05

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Characteristics

Operating voltage
100 V
Voltage at 4 mA
95 V
Regulation maximum
8 V
Ia1to8mA
Va (Ia ma)
212 ma
PublishedLine: Va (Ia=¢ ma) 212 95 7
Vo (Ia
4 mA
PublishedLine: Vo (Ia=4 mA) = 95 Ve

Other

Starting voltage maximum
140 V
Anode current minimum
1 mA
Anode current maximum
8 mA
Courant moyen max.
4 mA
PublishedLine: Courant moyen max. &4 mA
Ia max
8 mA
PublishedLine: Ia = max. 8 mA
Ig min
1 mA
PublishedLine: Ig min. 1 mA
Ia maX
8 mA
PublishedLine: Ia = maX,. 8 mA
Ia min
1 mA
PublishedLine: Ia min. 1 mA