6LN8

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9DC
Socket code: B9A
Base pins: 9
Nominal heater: 6 V / 450 mA

Description

Miniature type used in frequency-changer service in television receivers. Outlines section, 6B; requires 9DC miniature 9-contact socket. : : 362 RCA Receiving Tube Manual

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9DC
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9DC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN21G1	A	G1 — Control Grid Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN31G2	A	G2 — Screen Grid Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN4H	—	H — Heater Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN5H	—	H — Heater Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN61P	A	P — Plate (Anode) Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN71G3	A	G3 — Suppressor GridGroup 9DC7 Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN7IS	A	IS — Internal ScreenGroup 9DC7 Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN71K	A	K — CathodeGroup 9DC7 Chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN82K	B	K — Cathode EIA chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DC
PIN92G1	B	G1 — Control Grid EIA chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9DC

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8500 Ω
Transconductance: 0.0045 S
Amplification factor: 38
Max plate voltage: 250 V
Max plate dissipation: 1.5 W
Max cathode current: 14 mA

Published ratings/characteristics promoted from supplied source; additional conditions retained in parameter table.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 300000 Ω
Transconductance: 0.0075 S
Amplification factor: 20
Max plate voltage: 250 V
Max screen voltage: 150 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.75 W
Max cathode current: 14 mA

Published ratings/characteristics promoted from supplied source; additional conditions retained in parameter table.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage
6 V
Heater Current
450 mA
EquivalentElectricalType
6BL8
ExceptHeater
ControlledWarmupHeater
1 boolean

SECTION 2

Pentode

Characteristic

EquivalentElectricalType
6BL8
ExceptHeater
ControlledWarmupHeater
1 boolean

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater Voltage (ac/dc)
6 volts
Published value from supplied target entry
Heater Current
0.45 ampere
Published value from supplied target entry
Plate Supply Voltage
550 volts
Published value from supplied target entry
Plate Voltage
250 volts
Published value from supplied target entry
Grid-No
550 volts
Published value from supplied target entry
Grid-No
2
Published value from supplied target entry
With cathode current of
175 mA
Published value from supplied target entry
With cathode current less than
200 mA
Published value from supplied target entry
Cathode Current
14 mA
Published value from supplied target entry
Plate Dissipation
1.7 watts
Published value from supplied target entry
With plate dissipation greater than
0.5 watts
Published value from supplied target entry
With plate dissipation less than
0.75 watts
Published value from supplied target entry
Plate Voltage
170 volts
Published value from supplied target entry
Grid-No
170
Published value from supplied target entry
Grid-No
-2 volts
Published value from supplied target entry
Amplification Factor
20
Published value from supplied target entry
Plate Resistance (Approx.)
0.4 megohm
Published value from supplied target entry
Transconductance
6200
Published value from supplied target entry
Plate Current
10 mA
Published value from supplied target entry
Grid-No
2.8 mA
Published value from supplied target entry
Input Resistance at frequency of
0.01 megohm
Published value from supplied target entry
Grid-No
1
Published value from supplied target entry
Heater Warm-up Time
11 seconds
Published value from supplied target entry

Other

Peak Heater-Cathode Voltage ±
100 volts
Published value from supplied target entry

Capacitance

Grid to Plate
2.8 pF
Published value from supplied target entry
Plate to Cathode, Heater, Grid No
3
Published value from supplied target entry
Triode Grid to Pentode Plate
0.015 pF
Published value from supplied target entry
Pentode Plate to Triode Plate
0.17 pF
Published value from supplied target entry