27GB5

Magnoval beam-power tube designed as a television horizontal-deflection output amplifier.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9NH
Socket code: B9D
Base pins: 9
Nominal heater: 27 V / 300 mA

Description

Magnoval beam-power tube used as a horizontal-deflection amplifier in television receivers.

Socket description

Magnoval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9NH
Socket code: B9D
Base pins: 9
Nominal heater voltage: 27 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9NH - 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

Beam Power

X-ray radiationInterelectrode capacitances

Max plate voltage: 770 V
Max screen voltage: 275 V
Max plate dissipation: 17 W
Max screen dissipation: 5 W
Max cathode current: 275 mA

Horizontal-deflection output beam-power tube; supplied page states it is the 300 mA heater version of 6GB5 and does not reproduce the full electrical table.

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

Beam Power

Other

75; g;rid-No
2 V
Published in approved XL500 target datasheet entry; Section1
mA, 440; grid-No
2 mA
Published in approved XL500 target datasheet entry; Section1
Heater Voltage (ac/dc) 6.3 13.3 18
27 V
Published in approved XL500 target datasheet entry; Section1
Heater Current 1.38 0.6 0.45
300 mA
Published in approved XL500 target datasheet entry; Section1
Peak Positive-Pulse Plate Voltage*
7700 V
Published in approved XL500 target datasheet entry; Section1
DC Giid-No.2 (Screen-Grid) Voltage
275 V
Published in approved XL500 target datasheet entry; Section1
Average Cathode Current
275 mA
Published in approved XL500 target datasheet entry; Section1
Plate Dissipation 4
17 W
Published in approved XL500 target datasheet entry; Section1
Grid-No.2 Input"
5 W
Published in approved XL500 target datasheet entry; Section1
Without grid current
0.5 MΩ
Published in approved XL500 target datasheet entry; Section1
With grid current (horizontal-output service only)
2.2 MΩ
Published in approved XL500 target datasheet entry; Section1
# Pulse duration must not exceed 15% of a horizontal scanning cycle (
10 microseconds
Published in approved XL500 target datasheet entry; Section1
Grid-No.2 input may reach
6 W
Published in approved XL500 target datasheet entry; Section1
Grid-No.2 input may reach 6 watts for plate-dissipation values below
11 W
Published in approved XL500 target datasheet entry; Section1