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RK18

Raytheon transmitting power triode for RF amplification, oscillation, frequency multiplication, and Class B audio service. Rated around 40 W plate dissipation and 1.25 kV, published RF output reaches approximately 190 W.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: -
Nominal heater: 7.5 V / 3 A

Description

Power triode for RF amplification, oscillation, frequency multiplication, and Class-B audio service.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: -
Nominal heater voltage: 7.5 V
Nominal heater current: 3 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: 1250 V
Max plate dissipation: 40 W

Published ratings and characteristics promoted from the approved Raytheon source.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

HeaterVoltageNominal
7.5 V
Nominal
HeaterCurrentNominal
3 A
Nominal
Maximum Plate Voltage
1250 V
Maximum Plate Dissipation
40 W
Maximum Frequency
60 MHz
Full ratings or reduced-voltage operation as published

Data set 02

1938 Raytheon Amateur

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

RFOutputPower
190 W