7983

Quick-heating twin tetrode for hybrid mobile transceivers, serving as RF power output, driver, oscillator, or frequency multiplier. Internal neutralization supports operation to approximately 200 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 3.15 V / 1.65 A

Description

Quick-heating twin tetrode intended for hybrid mobile transceivers as an RF power-output, driver, oscillator or frequency-multiplier tube; internally neutralized to about 200 MHz.

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: -
Nominal heater voltage: 3.15 V
Nominal heater current: 1.65 A
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

2 physical sections, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.003 S
Amplification factor: 7.5
Max plate voltage: 300 V
Max screen voltage: 200 V
Max plate dissipation: 7 W
Max screen dissipation: 1 W
Max grid dissipation: 0.2 W
Max cathode current: 65 mA

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

Section 2

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.003 S
Amplification factor: 7.5
Max plate voltage: 300 V
Max screen voltage: 200 V
Max plate dissipation: 7 W
Max screen dissipation: 1 W
Max cathode current: 65 mA

Second identical physical 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

Transconductance
3000 µS
Amplification Factor
7.5

Other

Maximum Plate Voltage
300 V
Maximum Screen Voltage
200 V
Maximum Plate Dissipation
7 W
Maximum Screen Dissipation
1 W
Maximum Grid Dissipation
0.2 W
Maximum Cathode Current
65 mA

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Plate voltage
300 V
RFPower
Plate current
55 mA
RFPower
Power output
11 W
RFPower
Grid voltage
-40 V
RFPower
Grid current
1.5 mA
RFPower
Screen voltage
155 V
RFPower
Maximum frequency
200 MHz
RFPower

Capacitance

Grid-to-plate capacitance
0.08 pF
Input capacitance
6.8 pF
Output capacitance
3.2 pF