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Voltage Radio Detector Converter ·Diode-Diode-Pentode

1F6

Directly heated double-diode pentode for detector, AVC, and voltage-amplifier functions in battery receivers. Paired diodes provide signal and control rectification while the high-resistance pentode supplies subsequent gain.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 6W
Socket code: IO
Base pins: 6
Nominal heater: 2 V / 60 mA

Description

Directly heated duplex-diode sharp-cutoff pentode for detector and Class A amplifier service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 6W
Socket code: IO
Base pins: 6
Nominal heater voltage: 2 V
Nominal heater current: 60 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

6W - 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

Max plate voltage: 180 V
Max cathode current: 1 mA

Detector/AVC diode section 1.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Detector/AVC diode section 2.

Section 3

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.00065 S
Amplification factor: 650
Max plate voltage: 180 V
Max screen voltage: 67.5 V
Max plate dissipation: 0.4 W
Max screen dissipation: 0.05 W
Max cathode current: 3 mA

Pentode RF/IF amplifier section.

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

Pentode

Capacitance

Grid to Plate
0.007 pF
Published capacitance
Input
4 pF
Published capacitance
Output
9 pF
Published capacitance

Other

Plate Voltage
180 V
ClassA
Screen Voltage
67.5 V
ClassA
Grid Bias
-1.5 V
ClassA
Amplification Factor {approximate
650
ClassA
Plate Resistance (approximate
1 Mohm
ClassA
Transconductance
650 uS
ClassA
Screen Current
0.6 mA
ClassA
Transconductance at
-12 uS
ClassA; Column1
Transconductance at
15 uS
ClassA; Column2
Grid Biast
-1 V
ClassA; Column1
Grid Biast
-1.5 V
ClassA; Column2
Grid Biast
-240 V
ClassA; Column3
Signal Peak Voltage
0.64 V
ClassA; Column1
Signal Peak Voltage
0.63 V
ClassA; Column2
Signal Peak Voltage
0.62 V
ClassA; Column3
No-Signal Plate Current
0.42 mA
ClassA; Column1
No-Signal Plate Current
0.42 mA
ClassA; Column2
No-Signal Plate Current
0.42 mA
ClassA; Column3
Maximum-Signal Plate Current
0.34 mA
ClassA; Column1
Maximum-Signal Plate Current
0.34 mA
ClassA; Column2
Maximum-Signal Plate Current
0.34 mA
ClassA; Column3

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

HeaterVoltageNominal
2 V
Nominal
HeaterCurrentNominal
60 mA
Nominal
Maximum Plate Voltage
180 V
Maximum Cathode Current
1 mA

SECTION 3

Pentode

Other

HeaterVoltageNominal
2 V
Nominal
HeaterCurrentNominal
60 mA
Nominal
Maximum Plate Voltage
180 V
Maximum Screen Voltage
67.5 V
Maximum Cathode Current
3 mA

Characteristic

Transconductance
659 µS
Typical
Amplification Factor
650
Typical
Plate Resistance
1000000 ohm
Typical

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 3

Pentode

Other

Plate Voltage
180 V
Pentode; RF/IF
Screen Voltage
67.5 V
Pentode; RF/IF
Plate Current
2.2 mA
Pentode; RF/IF

Capacitance

Grid-to-Plate Capacitance
0.007 pF
Pentode

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 3

Pentode

Other

Maximum plate voltage
180 V
Maximum screen-grid voltage
67.5 V
Plate voltage
180 V
ClassA
Screen-grid voltage
67.5 V
ClassA
Control-grid voltage
-1.5 V
ClassA
Plate current
2.2 mA
ClassA
Screen-grid current
0.7 mA
ClassA
Plate resistance
1000000 Ohm
ClassA
Transconductance
650 uS
ClassA

Capacitance

Input capacitance
4 pF
Output capacitance
9 pF
Grid-to-plate capacitance
0.007 pF

Data set 05

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

MinimumDiodeCurrentAt10V
0.5 mA
DcApplied=10V

Other

MaximumDiodeCurrentContinuous
0.25 mA
ContinuousOperation

SECTION 2

Diode

Characteristic

MinimumDiodeCurrentAt10V
0.5 mA
DcApplied=10V

Other

MaximumDiodeCurrentContinuous
0.25 mA
ContinuousOperation

SECTION 3

Pentode

Other

Filament Voltage
2 V
Nominal
Filament Current
60 mA
Nominal
Plate Voltage
180 V
RFOrIFAmplifier
Screen Voltage
67.5 V
RFOrIFAmplifier
Control Grid Voltage
-1.5 V
RFOrIFAmplifier
Plate Current
2.2 mA
RFOrIFAmplifier
Screen Current
0.7 mA
RFOrIFAmplifier

Capacitance

Grid To Plate Capacitance
0.007 pF
Maximum
Input Capacitance
4 pF
Output Capacitance
9 pF

Characteristic

Plate Resistance
1000000 ohm
RFOrIFAmplifier
Transconductance
650 uS
RFOrIFAmplifier
TransconductanceAtControlGridMinus42V
20 uS
RFOrIFAmplifier