6AM8

Miniature diode-pentode designed for combined television video-detector and final-IF amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9CY
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

Miniature diode-pentode for combined video-detector and final-IF service.

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: 9CY
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9CY - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN11K	A	K — Cathode Original EIA label 1K; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN21G1	A	G1 — Control Grid Original EIA label 1G1; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN31G2	A	G2 — Screen Grid Original EIA label 1G2; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN4H	—	H — Heater Original EIA label H; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN5H	—	H — Heater Original EIA label H; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN61P	A	P — Plate (Anode) Original EIA label 1P; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN72K	B	K — Cathode Original EIA label 2K; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN82P	B	P — Plate (Anode) Original EIA label 2P; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY
PIN91G3	A	G3 — Suppressor Grid Original EIA label 1G3; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 131, 9CY

Section ratings

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max cathode current: 5 mA

Published maximum ratings, representative operating characteristics, and capacitance columns reviewed.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 600000 Ω
Transconductance: 0.007 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 3.2 W
Max screen dissipation: 0.55 W

Published maximum ratings, representative operating characteristics, and capacitance columns reviewed.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

Diode plate voltage at 50 mA
10 V

SECTION 2

Pentode

Application

Primary application
Final IF amplifier

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
150 V
Published handbook rating
Plate voltage
200 V
ClassA
Screen voltage
150 V
ClassA
Plate current
11.5 mA
ClassA
Screen current
2.7 mA
ClassA
Diode DC output current
5 mA
VideoDetector

Characteristic

Plate resistance
600000 ohm
Published handbook characteristic
Transconductance
7000 µS
Published handbook characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
450 mA
Published heater rating
Diode voltage drop
10 V
At 50 mA DC

Capacitance

Input capacitance
6 pF
Published capacitance column
Output capacitance
3.4 pF
Published capacitance column
Grid-to-plate capacitance
0.015 pF
Published capacitance column