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Voltage - Triode (single high frequency) ·Triode

3AI47J

Grounded-grid UHF oscillator triode designed for operation to approximately 750 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 700 mA

Description

Grounded-grid UHF oscillator triode, equivalent to 3A/I47J.

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
4 V
Nominal heater current
700 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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.005 S
Amplification factor
35
Max plate voltage
350 V
Max plate dissipation
6 W
Max grid dissipation
0.5 W
Max cathode current
28 mA

Grounded-grid oscillator triode.

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

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Anode-grid capacitance

    1.4 pF

  • Anode-cathode capacitance

    0.4 pF

  • Grid-cathode capacitance

    4.2 pF

Other

  • Maximum anode current

    28 mA

  • Oscillator output power

    1 to 2 W

    550 to 650 MHz