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6EA5

Sharp-cutoff tetrode for high-voltage RF amplification in VHF television tuners. Its high output resistance and controlled cutoff suit sensitive front-end service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7EW
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 200 mA

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7EW
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7EW - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN2IS	A	IS — Internal ScreenGroup 7EW2 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN2K	A	K — CathodeGroup 7EW2 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN3H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN4H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN5P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN6G2	A	G2 — Screen Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN7IS	A	IS — Internal ScreenGroup 7EW7 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW
PIN7K	A	K — CathodeGroup 7EW7 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 7EW

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Plate resistance: 150000 Ω
Transconductance: 0.004 S
Max plate voltage: 330 V
Max screen voltage: 150 V
Max plate dissipation: 3.25 W
Max screen dissipation: 0.5 W
Max cathode current: 20 mA

Typical values use published 250 V plate / 140 V screen condition.

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

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
250 V
RF-Amplifier
Grid 2 voltage
140 V
RF-Amplifier
Plate current
10 mA
RF-Amplifier
Grid 2 current
0.95 mA
RF-Amplifier