AX1

Directly heated gas-filled full-wave rectifier for conventional power supplies. Gas-assisted conduction provides relatively low forward voltage while the dual-anode structure supplies full-wave AC-to-DC conversion.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: A35
Socket code: -
Base pins: -
Nominal heater: 4 V / 2 A

Description

4 V directly heated gas-filled full-wave rectifier. Electrical ratings and operating characteristics were extracted from the supplied 4-volt valve data table, including the published heater data and available section-level values.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: A35
Socket code: -
Base pins: -
Nominal heater voltage: 4 V
Nominal heater current: 2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

A35 - 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

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 125 mA
Rectifier forward voltage drop: 15 V

Two identical rectifier anodes compressed to one section row; full-wave gas-filled type.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 125 mA
Rectifier forward voltage drop: 15 V

Second physical rectifier section; promoted electrical properties populated from identical section.

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

Rectifier

Other

AC voltage per plate
500 V RMS
FullWave
Nominal DC output current
125 mA
FullWave
Heater voltage
4 V
Heater current
2 A

SECTION 2

Rectifier

Other

AC voltage per plate
500 V RMS
FullWave
Nominal DC output current
125 mA
FullWave

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Maximum transformer secondary no-load voltage
2x500 V RMS
Maximum DC output current
125 mA
Maximum forward voltage drop
15 V
Maximum filter input capacitance
64 uF
CapacitorInputFilter
Minimum series resistance
100 ohm
FilterCapacitance=10uF
Minimum series resistance
150 ohm
FilterCapacitance=32uF
Minimum series resistance
200 ohm
FilterCapacitance=64uF