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LY88

Series-heater high-voltage efficiency diode for television horizontal-deflection circuits, providing line-output energy recovery with strong heater-cathode insulation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9CB
Socket code: B9A
Base pins: 9
Nominal heater: 20.2 V / 450 mA

Description

Miniature high-voltage booster diode used in line-time-base circuits of transformerless television receivers.

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: 9CB
Socket code: B9A
Base pins: 9
Nominal heater voltage: 20.2 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9CB - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN2IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN3IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN4H	—	H — Heater Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN5H	—	H — Heater Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN6IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN7IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN8IC	—	IC Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
PIN9P	A	P — Plate (Anode) Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB
CAP1K	A	K — Cathode Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9CB

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Max plate dissipation: 5 W
Rectifier peak inverse voltage: 6000 V
Rectifier nominal output current: 220 mA
Rectifier peak forward current: 550 mA

Published ratings, characteristics, typical operation, rectifier/regulator data, and capacitances reviewed.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater Voltage (ac/dc) 16.4
20.2 V
Published in approved XY88 target datasheet entry; Section1
Heater Current 0.6
450 mA
Published in approved XY88 target datasheet entry; Section1
Peak Heater-Cathode Voltage 6600
6600 V
Published in approved XY88 target datasheet entry; Section1
Supply Voltage at zero current
550 V
Published in approved XY88 target datasheet entry; Section1
Supply Voltage
250 V
Published in approved XY88 target datasheet entry; Section1
Peak Plate Current
550 mA
Published in approved XY88 target datasheet entry; Section1
Average Plate Current
220 mA
Published in approved XY88 target datasheet entry; Section1
Plate Dissipation
5 W
Published in approved XY88 target datasheet entry; Section1
* Under no conditions should an absolutemaximum value of
7500 V
Published in approved XY88 target datasheet entry; Section1
# The pulse duration must not exceed
22 %
Published in approved XY88 target datasheet entry; Section1
# The pulse duration must not exceed 22 per cent of a cycle, or a maximum of
18 microseconds
Published in approved XY88 target datasheet entry; Section1