8117

Twin tetrode designed for single-sideband RF applications. Its two identical physical tetrode sections support paired radio-frequency power operation in professional communications equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 1.8 A

Description

Twin tetrode designed for single-sideband RF applications, with identical sections represented once under the project's repeated-section compression rule.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 1.8 A
Parallel heater voltage: 6.3 V
Parallel heater current: 1.8 A
Series capable: Yes

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 7
Max plate voltage: 1000 V
Max screen voltage: 360 V
Max plate dissipation: 30 W
Max screen dissipation: 8 W
Max cathode current: 700 mA

Published ratings/characteristics promoted from the source; representative section used for repeated identical systems where applicable.

Section 2

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 7
Max plate voltage: 1000 V
Max screen voltage: 360 V
Max plate dissipation: 30 W
Max screen dissipation: 8 W
Max cathode current: 700 mA

Second identical physical Tetrode section; added to align physical rows with SectionCount.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Amplification Factor
7

Other

Maximum Plate Voltage
1000 V
Maximum Screen Voltage
360 V
Maximum Plate Dissipation
30 W
Maximum Screen Dissipation
8 W
Maximum Cathode Current
700 mA

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
1000 V
SSB
Plate current per section
131 mA
SSB
PEP power output
141 W
SSB
Grid voltage
-34 V
SSB
Grid current
0 mA
SSB
Screen voltage
250 V
SSB
Maximum frequency
175 MHz
SSB

Capacitance

Grid-to-plate capacitance
0.09 pF
Input capacitance
11.8 pF
Output capacitance
3.7 pF