8269

Forced-air-cooled directly heated industrial transmitting triode designed primarily for RF-heating generators. Approximately 6 kW plate dissipation and 8 kV plate capability provide substantial dielectric and induction-heating power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 33 A

Description

Forced-air-cooled directly heated industrial transmitting triode intended for RF-heating generators.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 12.6 V
Nominal heater current: 33 A
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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.012 S
Amplification factor: 24
Max plate voltage: 8000 V
Max plate dissipation: 6000 W
Max cathode current: 1.8 A

Promoted ratings and characteristics mapped from source tables.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Plate To Grid Capacitance
7.9 pF
Published direct interelectrode capacitance
Grid To Filament Capacitance
14.2 pF
Published direct interelectrode capacitance

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
7200 V
RFHeatingGenerator
Plate current
1.5 A
RFHeatingGenerator
Power output
7500 W
RFHeatingGenerator
Control-grid voltage
-1250 V
RFHeatingGenerator
Grid current
360 mA
RFHeatingGenerator
Maximum frequency at full input
50 MHz
RFHeatingGenerator

Capacitance

Grid-to-plate capacitance
7.9 pF
Section1
Grid-to-filament capacitance
14.2 pF
Section1
Plate-to-filament capacitance
1 pF
Section1