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Voltage Pentode - Sharp Cutoff (single) ·Pentode

CK5749

Pentode designed for radio-frequency or wide-band amplifier service in receiving or electronic equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9X
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

CK5749 is a Pentode tube listed by Raytheon for RF amplifier service. Reliable miniature RF-amplifier pentode.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9X
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9X - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN3H—H — Heater

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN4G3AG3 — Suppressor GridGroup 9X4

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN4ISAIS — Internal ScreenGroup 9X4

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN4KAK — CathodeGroup 9X4

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN6PAP — Plate (Anode)

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN8G2AG2 — Screen Grid

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

PIN9H—H — Heater

Transcribed from EIA chart; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9X

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1000000 Ω
Transconductance
0.0044 S
Max plate voltage
330 V
Max screen voltage
150 V
Max plate dissipation
3.3 W
Max screen dissipation
0.7 W

Reliable miniature RF-amplifier pentode.

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

    250 V

    RF amplifier

  • Control-grid cathode resistor

    68 ohm

    RF amplifier

  • Screen voltage

    100 V

    RF amplifier

  • Grid 3 voltage

    0 V

    RF amplifier

  • Plate current

    11 mA

    RF amplifier

  • Screen current

    4.2 mA

    RF amplifier