EY802

Low-heater-power television flyback/EHT rectifier for approximately 20 kV monochrome CRT supplies, converting horizontal-output pulses into the accelerating-voltage supply.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9C12
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 120 mA

Description

Extra-high-tension rectifier diode for 20 kV monochrome television CRT supplies. Indirectly heated Mazda/Belvu receiving tube; descriptive text translated to English from the French source.

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: 9C12
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 120 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9C12 - 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

Rectifier

X-ray radiationInterelectrode capacitances

Max cathode current: 0.5 mA
Rectifier peak inverse voltage: 30000 V
Rectifier nominal output current: 0.5 mA
Rectifier peak forward current: 50 mA

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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Filter capacitance maximum
2000 pF

Data set 02

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

BEL"U Redresseur pour l'alimentation T.H.T. (
20 kV
Capacité d€ SOrbIE .….…reeerenenmenennenentennnMnbnmnnmnnn Cs
1.2 pF
périeure à 2
0 pF
00€£ (A)PA Qsz 00c osi 001
0 s

Other

Tension filament
6.3 V
Courant filament
120 mA
dans le système deslimites absolues.…….……eesrees Va icr
30 kV
Courant de crête d'Anode ……..…..….….+..…..0…eerresmreceennensensenne Iacr
50 mA