6S2

Indirectly heated high-voltage half-wave rectifier explicitly designed for television EHT supplies driven from line-timebase flyback pulses, converting horizontal-scan energy into the CRT accelerating-voltage supply.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 90 mA

Description

Indirectly heated high-voltage half-wave rectifier for television EHT supplies driven from line-timebase flyback pulses.

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: 6.3 V
Nominal heater current: 90 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

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 24000 V
Rectifier nominal output current: 3 mA
Rectifier peak forward current: 40 mA

Published Rogers/JETEC/RMA ratings and characteristics promoted where applicable; additional data retained as parameters.

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

1959 Rogers

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

Application
Television EHT rectifier

Data set 02

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage
22 kV
PulseInput
Rectified current maximum
800 uA
PulseInput
Peak plate current maximum
40 mA
PulseInput
Reservoir capacitance maximum
2000 pF
PulseInput
RMS input voltage maximum
5 kV
SinusoidalInput
Rectified current maximum
3 mA
SinusoidalInput
Reservoir capacitance maximum
0.2 uF
SinusoidalInput
Minimum limiting resistance
100 kOhm
SinusoidalInput
X-ray shielding threshold
6 kV
ShieldingMayBeRequiredAboveThisPlateVoltage

Capacitance

Plate-to-heater/cathode/shield capacitance
1.8 pF