6193

Rugged long-life twin triode intended for reliable amplifier service in demanding equipment, with construction emphasizing dependable operation under adverse mechanical conditions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 8DG
Socket code: SUBMINIATURE8
Base pins: 8
Nominal heater: 6.3 V / 300 mA

Description

Ruggedized subminiature twin triode for military mixer, amplifier, and multivibrator service; electrically related to the 7F8 with different dissipation limits.

Socket description

Subminiature 8-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DG
Socket code: SUBMINIATURE8
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN22G1	B	G1 — Control Grid Original EIA label 2G1; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN3H	—	H — Heater Original EIA label H; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN42K	B	K — Cathode Original EIA label 2K; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN51K	A	K — Cathode Original EIA label 1K; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN6H	—	H — Heater Original EIA label H; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN71G1	A	G1 — Control Grid Original EIA label 1G1; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG
PIN81P	A	P — Plate (Anode) Original EIA label 1P; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8DG

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8500 Ω
Transconductance: 0.0065 S
Amplification factor: 55
Max plate voltage: 250 V
Max plate dissipation: 2 W
Max cathode current: 15 mA

One of two high-frequency triodes; identical-section compression applied.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8500 Ω
Transconductance: 0.0065 S
Amplification factor: 55
Max plate voltage: 250 V
Max plate dissipation: 2 W
Max cathode current: 15 mA

Second physical triode restored.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
300 mA
Published nominal value
Equivalent reference
7F8
Source states equivalent except dissipation limits

Other

Maximum plate dissipation
2 W
Published maximum rating
Application
Mixer; amplifier; multivibrator
Military/rugged service

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Input capacitance
2.75 pF
Output capacitance
2.2 pF
Grid-to-plate capacitance
1.46 pF

Other

Plate voltage
180 V
ClassA
Grid voltage
-1 V
ClassA
Plate current
11.5 mA
ClassA
Plate voltage
90 V
ClassA
Grid voltage
-0.5 V
ClassA
Plate current
4.5 mA
ClassA

Characteristic

Plate resistance
8500 ohm
At180V
Transconductance
6500 uS
At180V
Amplification factor
55
At180V
Plate resistance
9000 ohm
At90V
Transconductance
5800 uS
At90V
Amplification factor
50
At90V