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Voltage Radio Detector Converter ·Pentode-Triode

7059

Combined triode-pentode for oscillator, mixer, frequency-converter, RF, or IF service in television, communications, or mobile receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 13.5 V / 195 mA

Description

7059 is a TriodePentode vacuum tube documented in the RCA Receiving Tube Manual. The supplied excerpt was reviewed for heater data, section arrangement, maximum ratings, electrical characteristics, interelectrode capacitances, typical operating conditions, and stated applications.

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: 13.5 V
Nominal heater current: 195 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 4700 Ω
Transconductance: 0.0085 S
Amplification factor: 40
Max plate voltage: 300 V
Max plate dissipation: 2.5 W
Max cathode current: 25 mA

Published RCA ratings and characteristics promoted where applicable; additional application and operating data retained as parameters.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 400000 Ω
Transconductance: 0.0052 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.8 W
Max screen dissipation: 0.7 W
Max cathode current: 25 mA

Published RCA ratings and characteristics promoted where applicable; additional application and operating data retained as parameters.

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

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

CrossReference

Prototype / equivalent family
6U8A

Application

Application
Oscillator

SECTION 2

Pentode

Application

Application
Mixer

Other

Maximum IF frequency
40 MHz

Data set 02

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
13.5 V
Heater current
195 mA
Plate voltage
150 V
Triode
Plate current
18 mA
Triode

Characteristic

Plate resistance
4700 ohm
Triode
Transconductance
8500 uS
Triode

SECTION 2

Pentode

Other

Heater voltage
13.5 V
Heater current
195 mA
Plate voltage
250 V
Pentode
Plate current
10 mA
Pentode
Screen current
3.5 mA
Pentode

Characteristic

Plate resistance
400000 ohm
Pentode
Transconductance
5200 uS
Pentode