PCL88

Triode and beam-tetrode combination developed for 110-degree television field-deflection circuits, integrating oscillator/driver and high-current vertical-output functions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 16 V / 300 mA

Description

Triode output beam-tetrode for television field-deflection circuits using 110-degree cathode-ray tubes. The supplied English-language Mazda/Thorn-AEI datasheet was used for the technical and descriptive extraction.

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: B9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 16 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B9A - 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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0043 S
Amplification factor: 18
Max plate voltage: 250 V
Max plate dissipation: 1 W

Published ratings and characteristics promoted from the approved English source.

Section 2

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.0073 S
Amplification factor: 7.5
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 8 W
Max screen dissipation: 2 W
Max cathode current: 75 mA

Published ratings and characteristics promoted from the approved English source.

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

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Current Ih
3 A
Heater Voltage Vh
16 V
Maximum Anode Dissipation pa(max) 1
8 W
Maximum Screen Dissipation pg2(max) —
2 W
Maximum Anode Voltage Va(max) 250
250 V
Maximum Peak Anode Voltage (Pulse negative)
500 V
Maximum Screen Grid Voltage Vg(max) —
250 V
Maximum Mean Cathode Current Ik(av)max —
75 mA
Maximum pulse duration 5% of one cycle with a maximum of
1 ms

Characteristic

Grid 1 to Earth cgl _E 105 109
120 pF
Anode Tetrode to Earth Caq-E 95 103
114 pF
Grid 1 to Anode Tetrode Cgl .aq 032 032
33 pF
Grid Triode to Earth cgt-E 21 25
34 pF
Anode Triode to Earth cat-E 18 23
32 pF
Grid Triode to Anode Triode cgt-at 23 23
24 pF
Grid 1 to Anode Triode Cgl .at 0 009 0 015
2 pF
Grid Triode to Anode Tetrode cgt-aq 0 019 0 024 0
26 pF
Anode Tetrode to Anode Triode Caq-at 0 078 009 0
98 pF
Anode Voltage Va 100
170 V
Screen Grid Voltage VS2
170 V
Anode Current la 10
50 mA
Mutual Conductance gm 43
73 mA
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