6EL7

Screened high-frequency pentode developed for television and other wideband amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 300 mA

Description

Screened HF pentode for television or high-frequency amplifier 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: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0092 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 2 W
Max screen dissipation: 0.5 W

Ediswan/Mazda 6EL7 nine-pin B9A high-frequency screened pentode for television and broadband amplification. Manufacturer heater 6.3 V 0.3 A, maximum anode 250 V and screen 250 V; nominal transconductance 9.2 mA/V (0.0092 S), measured under specified bias conditions. Original manufacturer sheet includes 3 W anode and 1 W screen general ratings but condition-dependent limits of 2 W anode and 0.5 W screen; these existing more restrictive promoted dissipation values retained pending operating-condition reconciliation. Typical Va/Vg2 near 170 V with 10 mA anode and 2.6 mA screen current. Shielded and holder-dependent electrode capacitances published; existing capacitance flag true preserved. Do not confuse conditional power ratings with unrestricted absolute maxima.

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

1959 Ediswan

Published operating points and test conditions from this source.

SECTION 1

Pentode

Application

Application
HF amplifier