7E5

Lock-In UHF triode for signal-source, local-oscillator, and power-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8BN
Socket code: LOCTAL8
Base pins: 8
Nominal heater: 6.3 V / 150 mA

Description

A Lock-In cathode-type triode designed for ultra-high-frequency use as a signal source, local oscillator, or power amplifier.

Socket description

Loctal 8-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8BN
Socket code: LOCTAL8
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8BN - 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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 12000 Ω
Transconductance: 0.003 S
Amplification factor: 36
Max plate voltage: 250 V
Max plate dissipation: 4 W
Max cathode current: 16 mA
Rectifier max heater-cathode voltage: 90 V

Published promoted fields populated by semantic heading; identical repeated physical sections compressed.

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

Triode

Other

HeaterVoltageNominal
7 V
Nominal
HeaterCurrentNominal
160 mA
Nominal
Plate Voltage
180 V
ClassA
Oscillator Frequency
750 MHz
UHF;Oscillator
Power Output
0.2 W
UHF;PowerAmplifier;300MHz

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Input capacitance
3.6 pF
Section1
Output capacitance
2.8 pF
Section1
Grid-to-plate capacitance
1.5 pF
Section1

Other

Typical plate voltage
180 V
ClassA
Typical grid voltage
-3 V
ClassA
Typical plate current
5.5 mA
ClassA

Characteristic

Plate resistance
12000 Ohm
Section1
Transconductance
3000 uS
Section1
Amplification factor
36
Section1

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid To Plate Capacitance
1.5 pF
Input Capacitance
3.6 pF
Output Capacitance
2.8 pF