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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

6999

Subminiature directly heated power pentode for wearable and portable battery equipment with very low current consumption.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.64 V / 50 mA

Description

Subminiature filament-type pentode designed as a power amplifier for wearable and portable equipment, with flexible wire leads.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
2.64 V
Nominal heater current
50 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.00165 S
Max plate voltage
145 V
Max screen voltage
95 V
Max plate dissipation
0.75 W
Max screen dissipation
0.12 W
Max cathode current
7 mA

Section 1 extracted from 6999.pdf.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    145 V

    Plate Voltage 145 volts AN

  • Grid #2 Voltage

    95 V

    Grid #2 Voltage 95 volts

  • Total Cathode Current

    7 mA

    Total Cathode Current 7 ma. : AN

  • Plate Dissipation

    0.75 W

    Plate Dissipation 0.75 watts :

  • Grid #2 Dissipation

    0.12 W

    Grid #2 Dissipation 0.12 watts E .

  • Filament Current

    50 mA

    Filament Current 50 ma.

  • Plate Voltage

    67.5 V

    Plate Voltage 67.5 volts :

  • Grid #2 Voltage

    67.5 V

    Grid #2 Voltage 67.5 volts .

  • Grid #1 Voltage

    -4 V

    Grid #1 Voltage —4.0 volts \

  • Plate Current

    4 mA

    Plate Current 4.0 ma. . RED DOT

  • Grid #2 Current

    0.9 mA

    Grid #2 Current 0.9 ma. :

  • Transconductance

    1650 µS

    Transconductance 1650 pmhos ,

  • L.oad Resistance

    12 kΩ

    L.oad Resistance 12 kilohms _ 6 54321

  • Peak AF Signal Voltage

    4 V

    Peak AF Signal Voltage 4.0 volts Lead I Plate

  • A A resistor of

    680 Ω

    A A resistor of 680 ohms is connected in parallel with leads 2 and center tap lead 4. ' Lead 4 Filament center