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RK812A

Raytheon directly heated transmitting triode for RF and audio-frequency power amplification. Approximately 65 W plate dissipation and 1.5 kV capability provide medium-power transmitter and modulator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 4 A

Description

RK812A is a Raytheon triode intended for rf-af amplifier, with published transmitting-service maximum ratings and capacitances.

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: 6.3 V
Nominal heater current: 4 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

Max plate voltage: 1500 V
Max plate dissipation: 65 W
Max cathode current: 175 mA

Published transmitting-tube maximum voltages/currents, power ratings and capacitances; RF-AF Amplifier.

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

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Filament/heater voltage
6.3 V
Filament
Filament/heater current
4 A
Filament

Other

Maximum plate voltage
1500 V
RF-AF Amplifier
Maximum grid-1 voltage
-200 V
RF-AF Amplifier
Maximum plate current
175 mA
RF-AF Amplifier
Maximum grid-1 current
35 mA
RF-AF Amplifier
Maximum plate dissipation
65 W
RF-AF Amplifier
Maximum drive power
6.5 W
RF-AF Amplifier
Maximum output power
190 W
RF-AF Amplifier

Capacitance

Grid-to-plate capacitance
5.5 pF
Published transmitting-tube table
Input capacitance
5.4 pF
Published transmitting-tube table
Output capacitance
0.77 pF
Published transmitting-tube table