5618

Quick-heating center-tapped-filament power pentode for audio power amplification where rapid warm-up is required.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 6 V / 200 mA

Description

Quick-heating center-tapped filament power pentode for audio power-amplifier service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 6 V
Nominal heater current: 200 mA
Parallel heater voltage: 3 V
Parallel heater current: 400 mA
Series capable: Yes

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

Transconductance: 0.0035 S
Max plate voltage: 300 V
Max screen voltage: 125 V
Max plate dissipation: 5 W
Max screen dissipation: 2 W

VHF power 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

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

HeaterOrFilamentVoltage
6 V
HeaterOrFilamentCurrent
200 mA
SeriesFilamentArrangement
1 boolean
CenterTappedFilament

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Pentode

Application

Application
VHF RF amplifier / oscillator / frequency multiplier

Other

Maximum full-rating frequency
100 MHz

Characteristics

Off-to-on heating time
1 s

Data set 03

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum DC Plate Voltage
300 V
VHF power pentode
Maximum DC Screen Voltage
125 V
VHF power pentode
Plate Dissipation
5 W
VHF power pentode
Screen Input
2 W
VHF power pentode
Typical DC Plate Voltage
250 V
VHF power pentode
Typical DC Screen Voltage
75 V
VHF power pentode
Maximum-Signal Power Output
1.4 W
VHF power pentode

Characteristics

Transconductance
3500 µS
VHF power pentode
Grid-No.1 to Plate Capacitance
0.24 pF
VHF power pentode
Input Capacitance
7 pF
VHF power pentode
Output Capacitance
5 pF
VHF power pentode