8528

Rugged micro-metal beam-power pentode designed for low-voltage audio power amplification in compact equipment requiring mechanically robust construction.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B8D
Base pins: -
Nominal heater: 6.3 V / 450 mA

Description

The Toshiba 8528 is a rugged micro-metal beam-power pentode for low-voltage audio power amplification.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8D
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

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

Plate resistance: 15000 Ω
Transconductance: 0.0042 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 3.7 W
Max screen dissipation: 0.4 W

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

Heater Voltage
6.3 V
Heater Current
450 mA
Plate-Grid Capacitance
0.011 pF
Input Capacitance
6.5 pF
Output Capacitance
7.5 pF
Transconductance
4200 uS
Plate Resistance
15000 ohm

Other

Maximum Plate Voltage
165 V
Maximum Screen Voltage
155 V
Maximum Cathode Current
50 mA
Plate Voltage
110 V
ClassA; AudioAmplifier
Screen Voltage
110 V
ClassA; AudioAmplifier
Plate Current
30 mA
ClassA; AudioAmplifier
Load Resistance
3000 ohm
ClassA; AudioAmplifier
Power Output
1 W
ClassA; AudioAmplifier