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PY88

High-current television efficiency diode for horizontal-deflection line-output stages, combining strong heater-cathode insulation with substantial recovery-current capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9C12
Socket code: B9A
Base pins: 9
Nominal heater: 30 V / 300 mA

Description

Efficiency diode for television line-deflection recovery service. The supplied French datasheet was translated to English for descriptive output.

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: 30 V
Nominal heater current: 300 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 plate voltage: 250 V
Max plate dissipation: 5 W
Max cathode current: 220 mA
Rectifier peak inverse voltage: 7500 V
Rectifier nominal output current: 220 mA
Rectifier peak forward current: 550 mA
Rectifier max heater-cathode voltage: 6600 V

Published values promoted where clearly readable; identical repeated sections compressed when applicable.

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 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Indirect (cathode isolee du filament)
300 mA
Rectifier
Alimentation du filament en serie |vt
30 V
Rectifier
020n cuu nn p
255 mA/V
Rectifier

Capacitance

Plate capacitance
8.6 pF
Rectifier
Cathode-heater capacitance
2 pF
Rectifier

Other

Plate voltage
250 V
Rectifier
Plate current
220 mA
Rectifier
Courant de crete de l'anode
550 mA
Rectifier
Plate dissipation
5 W
Rectifier
Condensateur de recuperation
4 uF
Rectifier
la masse
220 V
Rectifier
cathode (K positive)
6 kV
Rectifier

Data set 02

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

Heater voltage
30 V
Published nominal value or midpoint of published range
Heater current
300 mA
Published nominal value or midpoint of published range

Capacitance

Anode-cathode capacitance
8.6 pF
Published first-page value

Data set 03

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

Application
Television booster / damper diode
Deflection-system application
110-degree CRT

Data set 04

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Capacitance

Anode capacitance
8.6 pF
Cathode-heater capacitance
2 pF

Other

Maximum DC anode voltage
550 V
Maximum anode voltage
250 V
Maximum average anode current
220 mA
Maximum peak anode current
550 mA
Maximum cathode-positive pulse voltage
7.5 kV
AbsoluteMaximum
Maximum heater-cathode pulse voltage
6.6 kV

Data set 05

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Boos te r diode with a maximum peak inverse voltage of
6.6 a
Characteristic
110' d e flection ongle cathode ray tubes.
110
Characteristic

Other

*P.I.V. max
6 V
LIMITING VALUE S
* ia(p kl max
550 mA
LIMITING VALUE S
* Vh - k (P k ) ma x. (cathode positive)
6.6 ma
LIMITING VALUE S

Data set 06

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Tension filament
30 V
Courant filament
300 mA

Data set 07

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

HeaterVoltageNominal
30 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Dissipation
5 W
Maximum Cathode Current
220 mA
Maximum Peak Inverse Voltage
7500 V
PeakForwardCurrent
550 mA
MaximumNegativePeakAnodeVoltageDesignCentre
6000 V
Pulse

Data set 08

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Supply voltage at zero current
550 V
Supply voltage
250 V
Peak plate current
550 mA
Average plate current
220 mA
Peak negative-pulse plate voltage
6000 V
LineTimeBase

AbsoluteMaximum

Absolute peak negative-pulse plate voltage
7500 V
LineTimeBase

Data set 09

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Anode current, peak Iap max
550 mA
Anode current, peak Iap max. 550 mA
Anode voltage, negative peak —Vap max
6000 V
Anode voltage, negative peak —Vap max. 6000 V
Cathode to heater voltage, peak kap max
6600 V
Cathode to heater voltage, peak kap max. 6600 V
Heater current If
300 mA
Heater current If 300 mA
Anode to all C,
8.6 pF
Anode to all C, 8.6 pF
Cathode to heater T Cys
2.7 pF
Cathode to heater T Cys 2.7 pF
Supply voltage Vbo max
550 V
Supply voltage Vbo max. 550 V
Anode dissipation W, max
5 W
Anode dissipation W, max. 5 W
Anode current, average I, max
220 mA
Anode current, average I, max. 220 mA