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

85

Early double-diode low-mu triode combining detector and AVC functions with a low-resistance amplifier. Paired diodes handle signal and control rectification while the triode favors useful current drive.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 6
Socket code: UX6
Base pins: 6
Nominal heater: 6.3 V / 300 mA

Description

Indirectly heated dual-diode triode for combined detector, amplifier, and AVC 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

No fixed ratings are recorded for this section.

Diode section is physically present; this datasheet publishes no separate fixed diode rating table.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7500 Ω
Transconductance: 0.0011 S
Amplification factor: 8.3
Max plate voltage: 240 V
Max plate dissipation: 2 W

Promoted from clearly identified printed ratings/characteristics; additional operating points, rectifier filter conditions, detector modes, and capacitances retained in TUBE_SECTION_PARAMETER.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added during approved section-structure reconciliation.

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 2

Triode

Capacitance

Grid-to-plate capacitance
1.7 pF
Section1
Input capacitance
2 pF
Section1
Output capacitance
3.5 pF
Section1

Other

Plate voltage
135 V
ClassA
Control-grid voltage
-10.5 V
ClassA
Plate current
3.7 mA
ClassA
Load resistance
25000 Ω
135VPlate
Power output
75 mW
135VPlate
Plate voltage
180 V
ClassA
Control-grid voltage
-13.5 V
ClassA
Plate current
6 mA
ClassA
Load resistance
20000 Ω
180VPlate
Power output
160 mW
180VPlate
Plate voltage
250 V
ClassA
Control-grid voltage
-20 V
ClassA
Plate current
8 mA
ClassA
Load resistance
20000 Ω
250VPlate
Power output
350 mW
250VPlate

Characteristic

Plate resistance
11000 Ω
135VPlate
Transconductance
750 µS
135VPlate
Amplification factor
8.3
Section1
Plate resistance
8500 Ω
180VPlate
Transconductance
975 µS
180VPlate
Plate resistance
7600 Ω
250VPlate
Transconductance
1100 µS
250VPlate

Data set 02

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

Plate Voltage
135 V
TriodePoint1
Plate Current
3.7 mA
TriodePoint1
Grid Voltage
-10.5 V
TriodePoint1
Plate Voltage
250 V
TriodePoint2
Plate Current
8 mA
TriodePoint2
Grid Voltage
-20 V
TriodePoint2

Characteristic

Plate Resistance
11000 ohm
TriodePoint1
Transconductance
750 µS
TriodePoint1
Amplification Factor
8.3
TriodePoint1
Plate Resistance
7500 ohm
TriodePoint2
Transconductance
1100 µS
TriodePoint2

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

Plate Resistance
7500 ohm
Transconductance
1100 µS
Amplification Factor
8.3

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Heater voltage
6.3 V
Nominal
Heater current
300 mA
Nominal

Characteristic

Plate current
3.7 mA
Published operating table; OperatingPoint1
Plate current
6 mA
Published operating table; OperatingPoint2
Plate current
8 mA
Published operating table; OperatingPoint3
Transconductance
750 uS
Published operating table; OperatingPoint1
Transconductance
975 uS
Published operating table; OperatingPoint2
Transconductance
1100 uS
Published operating table; OperatingPoint3
Plate resistance
11000 ohm
Published operating table; OperatingPoint1
Plate resistance
8500 ohm
Published operating table; OperatingPoint2
Plate resistance
7500 ohm
Published operating table; OperatingPoint3

SECTION 2

Triode

Other

Heater voltage
6.3 V
Nominal
Heater current
300 mA
Nominal

Characteristic

Plate current
3.7 mA
Published operating table; OperatingPoint1
Plate current
6 mA
Published operating table; OperatingPoint2
Plate current
8 mA
Published operating table; OperatingPoint3
Transconductance
750 uS
Published operating table; OperatingPoint1
Transconductance
975 uS
Published operating table; OperatingPoint2
Transconductance
1100 uS
Published operating table; OperatingPoint3
Plate resistance
11000 ohm
Published operating table; OperatingPoint1
Plate resistance
8500 ohm
Published operating table; OperatingPoint2
Plate resistance
7500 ohm
Published operating table; OperatingPoint3