EZ12

Indirectly heated full-wave rectifier for mains-powered electronic equipment. Its 6.3 V heater construction supports transformer-dependent DC output up to approximately 125 mA in documented operating conditions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: Y8A
Base pins: -
Nominal heater: 6.3 V / 900 mA

Description

Indirectly heated full-wave rectifier for mains-powered equipment, rated up to 125 mA DC output depending on transformer voltage.

Socket description

Steel-tube 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: Y8A
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 900 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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 500 V
Rectifier nominal output current: 125 mA
Rectifier peak forward current: 450 mA
Rectifier max heater-cathode voltage: 550 V

Representative promoted row for repeated identical sections.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 500 V
Rectifier nominal output current: 125 mA
Rectifier peak forward current: 450 mA
Rectifier max heater-cathode voltage: 550 V

Physical rectifier section 2; identical section values duplicated per physical-section policy.

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 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Transformer voltage maximum
2x500 V
FullWave
DC output current maximum
100 mA
At500V
DC output current maximum
125 mA
At400VOrLess

Data set 02

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

RMS transformer voltage per plate
500 V
At100mADC;2x500V
DC output current maximum
100 mA
At2x500Vrms
RMS transformer voltage per plate
400 V
At125mADC;2x400VOrLess
DC output current maximum
125 mA
At2x400VrmsOrLess
Transformer voltage-current product maximum
100000 V*mA
2xU_rms * I_dc;400-500V range
Heater-to-cathode voltage maximum
550 V
Reservoir capacitance maximum
32 uF
Minimum series and protection resistance
300 Ohm
Reservoir capacitance
16 uF
Curves