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Voltage Pentode - Sharp Cutoff (single) ·Pentode

3JD6

Sharp-cutoff pentode designed for television IF, picture-IF, video, or VHF tuner amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9PM
Socket code: B9A
Base pins: 9
Nominal heater: 3.5 V / 600 mA

Description

Sharp-cutoff frame-grid miniature pentode used as a television IF amplifier around 40 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: 9PM
Socket code: B9A
Base pins: 9
Nominal heater voltage: 3.5 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9PM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 160000 Ω
Transconductance: 0.014 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.55 W
Rectifier max heater-cathode voltage: 200 V
Rectifier warm-up time: 11 s

Published promoted fields populated by semantic headings; 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Transconductance
14000 uS
Typical
Plate Resistance
160000 ohm
Typical

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
125 V
Screen-grid voltage
125 V
Cathode bias resistor
56 Ohm
Plate current
15 mA
Screen-grid current
4 mA

Characteristics

Plate resistance
160000 Ohm
Transconductance
14000 uS
Control-grid cutoff voltage
-4.5 V
At600uS

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid-to-plate capacitance maximum
0.019 pF
Section1
Input capacitance
8.2 pF
Section1
Output capacitance
3 pF
Section1

Characteristic

Heater warm-up time
11 s
Section1
Transconductance
14000 µS
Section1
Plate resistance
0.16 MΩ
Section1
Grid-1 voltage at 600 uS transconductance
-4.5 V
Section1

Other

Plate voltage
125 V
IFAmplifier
Screen voltage
125 V
IFAmplifier
Cathode-bias resistor
56 Ω
IFAmplifier
Plate current
15 mA
IFAmplifier
Screen current
4 mA
IFAmplifier

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Peak value
200 V
Other;PublishedValue1
Peak value
200 V
Other;PublishedValue2
Average value
100 V
Other;PublishedValue1
Average value
100 V
Other;PublishedValue2
Plate Voltage
330 V
MaximumRating
Grid-No.3 (Suppressor-Grid) Voltage, Positive value
0 V
MaximumRating
Grid-No.2 (Screen-Grid) Supply Voltage
330 V
MaximumRating
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating
Plate Dissipation
2.5 W
MaximumRating
For grid-No.2 voltages up to 165 volts
0.6 V
MaximumRating
PLATE VOLTS
5 V
MaximumRating
For fixed-bias operation
0.25 megohm
MaximumCircuitValue
For cathode-bias operation
1 megohm
MaximumCircuitValue

Capacitance

Grid No.l to Plate
0.019 pF
Capacitance
Internal Shield
8.2 pF
Capacitance

Characteristic

Plate Supply Voltage
125 V
Characteristic
Grid-No.3 Voltage
0 V
Characteristic
Grid-No.2 Supply Voltage
125 V
Characteristic
Grid-No.l Supply Voltage
0 V
Characteristic
Cathode-Bias Resistor
56 ohm
Characteristic
Plate Resistance (Approx.)
160000 ohm
Characteristic
Transconductance
14000 uS
Characteristic
Plate Current
15 mA
Characteristic
Grid-No.2 Current
4 mA
Characteristic