6840

High-perveance miniature twin triode designed for computer frequency-divider and on-off control service, with strong resistance to shock, vibration, and repeated heater cycling.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9CZ
Socket code: -
Base pins: 9
Nominal heater: 6.3 V / 800 mA

Description

Miniature medium-mu twin triode designed for computer frequency-divider and on-off control service, with high perveance and high shock, vibration, and heater-cycling capability.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9CZ
Socket code: -
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 800 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9CZ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) Original EIA label 2P; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN22K	B	K — Cathode Original EIA label 2K; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN32G1	B	G1 — Control Grid Original EIA label 2G1; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN4H	—	H — Heater Original EIA label H; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN5H	—	H — Heater Original EIA label H; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN61P	A	P — Plate (Anode) Original EIA label 1P; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN71K	A	K — Cathode Original EIA label 1K; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN81G1	A	G1 — Control Grid Original EIA label 1G1; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ
PIN9HCT	—	HCT — Heater Center Tap Original EIA label HCT; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CZ

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 3000 Ω
Transconductance: 0.0067 S
Amplification factor: 20
Max plate voltage: 300 V
Max plate dissipation: 4 W
Max cathode current: 35 mA

Two electrically identical triode sections compressed to one representative row per locked identical-section rule.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 3000 Ω
Transconductance: 0.0067 S
Amplification factor: 20
Max plate voltage: 300 V
Max plate dissipation: 4 W
Max cathode current: 35 mA

Second physical triode section; electrically identical twin section.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Grid-to-plate capacitance each section
5.5 pF
Input capacitance each section
4 pF
Output capacitance
0.7 pF
Section1
Output capacitance
0.65 pF
Section2

Other

Total plate dissipation both plates
7 W