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EY84

Indirectly heated half-wave rectifier designed primarily for high-altitude operation. Its construction provides reliable moderate-current power conversion under reduced atmospheric pressure.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Noval
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 1 A

Description

H ALF -W AV E RECTI FI ER Indirectly heated half-wave rectifier primarily intended for operation at high altitudes. EY84 HEATE R 6.3 V 1.0 A LIMI TI N G VAL UES

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: Noval
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 1 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Noval - 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

Rectifier peak inverse voltage: 2000 V
Rectifier nominal output current: 150 mA
Rectifier peak forward current: 900 mA
Rectifier forward voltage drop: 22 V
Rectifier max heater-cathode voltage: 650 V

Half-wave rectifier primarily intended for high-altitude operation.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
900 mA
Anode Voltage Drop
22 V
OutputCurrent=150mA

Other

HeaterCathodeVoltageMaximum
650 V
HeaterNegative
DCOutputCurrentMaximum
150 mA
CapacitorInputFilter;RMSInput=500V
DCOutputCurrentMaximum
175 mA
CapacitorInputFilter;RMSInput=700V
PeakAnodeCurrentMaximum
900 mA

Data set 02

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

AC input voltage
500 V RMS
TwoTubes; TwoPhaseHalfWave
Series resistance
150 ohm
PerTube; ACInput=500V
Filter capacitance at 50Hz
16 uF
Filter capacitance at 1600Hz
0.5 uF
DC output current
300 mA
TwoTubes; ACInput=500V
DC output voltage
500 V
TwoTubes; ACInput=500V
AC input voltage
625 V RMS
TwoTubes; TwoPhaseHalfWave
Series resistance
250 ohm
PerTube; ACInput=625V
DC output current
250 mA
TwoTubes; ACInput=625V
DC output voltage
635 V
TwoTubes; ACInput=625V
Peak inverse voltage
2000 V
Maximum DC current at 500 V input
150 mA
PerTube
Maximum DC current at 625 V input
125 mA
PerTube
Maximum peak current
900 mA
Maximum filter capacitance
24 uF

Data set 03

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

P.I.V. max
2 V
Characteristic
lout ma x. l See rat ing cha rt
1 ma
Characteristic
lout ma x. l See rat ing chart
1 ma
Characteristic
Anod e vo ltage drop (lout =
22 V
CHARACTERISTICS
using a capacitor of
5 a
CHARACTERISTICS
lout
0 mA
CHARACTERISTICS
lim it ing re sist ance. Rating cha rt
2
CHARACTERISTICS
Refe r e nce should be made to rati ng cha rt
1 A
CHARACTERISTICS
Ca pa citor input f ilt e r bas ed upon ia (surge):;
2 A
CHARACTERISTICS
Ca pac it or input bas ed upon ia(pk) ma x =
0 ma
CHARACTERISTICS

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Published electrical datum
6.3 V
Chauffage: indirect par C.A. ou C.C. Ve = 6,3 V
Published electrical datum
1 A
alimentation en parallble Ir = 1,0 A
Published electrical datum
635 V
Vo = 500 635 V
Published electrical datum
2000 V
Vinv.p. = max, 2000 V
Published electrical datum
500 Veff
Rt (Vi § 500 Veff) = min. 150 ®

Other

Published electrical datum
250 mA
To = max. 300 250 mA
Published electrical datum
500 Veff
Io (Vi = 500 Veff) = max. 150 mA
Published electrical datum
125 mA
(V41 = 625 Vefr) = max. 125 mA
Published electrical datum
900 mA
lap = max. 0,9 A
Published electrical datum
24 µF
Crilt = Max. 24 uF
Published electrical datum
500 V
Vif (k pos.; f neg.) = max. 500 V
Heater voltage
6.3 V
Nominal heater rating
Heater current
1 A
Nominal heater rating