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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode

75

Double-diode triode combining radio detector and AVC rectification with subsequent voltage amplification. The paired diodes handle signal and control-voltage functions while the triode provides receiver audio or voltage gain.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
6
Socket code
UX6
Base pins
6
Nominal heater
6.3 V / 300 mA

Description

High-mu double-diode triode for detector and Class-A amplifier service.

Socket description

Small 6-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6
Socket code
UX6
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances
Rectifier max heater-cathode voltage
100 V

Published ratings and characteristics mapped semantically; identical repeated sections compressed.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical detector diode section added in approved section-structure reconciliation.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
91000 Ω
Transconductance
0.0011 S
Amplification factor
100
Max plate voltage
240 V

Published ratings and characteristics mapped semantically; identical repeated 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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 3

Triode

Capacitance

  • Grid-to-plate capacitance

    1.7 pF

    Section1

  • Input capacitance

    2 pF

    Section1

  • Output capacitance

    3.5 pF

    Section1

Other

  • Plate voltage

    250 V

    ClassA

  • Control-grid voltage

    -2 V

    ClassA

  • Plate current

    1 mA

    ClassA

Characteristic

  • Plate resistance

    91800 Ω

    Section1

  • Transconductance

    1100 µS

    Section1

  • Amplification factor

    100

    Section1

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    300 mA

    Published nominal/aggregate value

Capacitance

  • Grid-to-triode-plate capacitance

    1.7 pF

    Published

  • Grid-to-cathode capacitance

    1.7 pF

    Published

  • Triode plate-to-cathode capacitance

    3.8 pF

    Published

SECTION 3

Triode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    300 mA

    Published nominal/aggregate value

  • Transconductance

    1100 µS

    Published operating characteristic

  • Amplification factor

    100

    Published operating characteristic

Data set 03

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 3

Triode

Characteristics

  • Anode Voltage

    250 V

  • Anode Current

    0.9 mA

  • Control Grid Voltage

    -2 V

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Minimum Diode Current

    0.8 mA

    EachDiode;AppliedVoltage=40V

SECTION 3

Triode

Capacitance

  • Grid To Plate Capacitance

    1.7 pF

    Triode

  • Input Capacitance

    1.7 pF

    Triode

  • Output Capacitance

    3.8 pF

    Triode