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CK518AX

Directly heated Raytheon subminiature power-amplifier pentode using a 1.25 V, 30 mA filament and typical 45 V plate supply. Designed for compact battery-operated output stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5E
Socket code: -
Base pins: 5
Nominal heater: 1.25 V / 30 mA

Description

CK518AX is a directly heated Raytheon subminiature pentode listed for power amplifier service. The summary table specifies a 1.25-V, 30-mA filament and a typical 45-V plate operating point.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5E
Socket code: -
Base pins: 5
Nominal heater voltage: 1.25 V
Nominal heater current: 30 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5E - 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 350000 Ω
Transconductance: 0.00055 S

Published values are typical summary-table operating/characteristic data, not maximum ratings.

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

Pentode

Other

Plate Voltage
45 V
Typical operating point; Power Amp.
Grid 1 Voltage
-2 V
Typical operating point; Power Amp.
Grid 2 Voltage
45 V
Typical operating point; Power Amp.
Plate Current
0.8 mA
Typical operating point; Power Amp.
Grid 2 Current
0.25 mA
Typical operating point; Power Amp.
Output Power
9.5 mW
Typical operating point; Power Amp.
Load Resistance
0.5 MOhm
Typical operating point; Power Amp.
Maximum Length
1.515 in
Maximum dimension
Maximum Width
0.38 in
Maximum dimension
Maximum Thickness
0.29 in
Maximum dimension