5784WB

High-reliability military version of the 5784WA dual-control VHF pentode. It retains gated-amplifier, mixer, and gain-control functions while emphasizing dependable operation under demanding environmental conditions in compact high-frequency equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: SUBMINIATURE8
Base pins: 8
Nominal heater: 6.3 V / 200 mA

Description

The 5784WB is the high-reliability military version of the 5784WA dual-control VHF pentode and is specified as a direct replacement where the WA type is used.

Socket description

Subminiature 8-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: SUBMINIATURE8
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 200 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: 0.0032 S
Max plate voltage: 165 V
Max screen voltage: 155 V
Max plate dissipation: 0.79 W
Max screen dissipation: 0.6 W
Max cathode current: 16.5 mA
Rectifier max heater-cathode voltage: 200 V

Dual-control VHF pentode; grid-3 control values retained in parameters.

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

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Maximum grid-1-to-plate capacitance
0.03 pF
WholeTube
Input capacitance
4.5 pF
WholeTube
Output capacitance
3.6 pF
WholeTube

Other

Maximum plate voltage
165 V
WholeTube
Maximum screen voltage
155 V
WholeTube
Maximum plate dissipation
0.79 W
WholeTube
Maximum screen dissipation
0.6 W
WholeTube
Maximum cathode current
16.5 mA
WholeTube
Plate voltage
120 V
ClassA1
Screen voltage
120 V
ClassA1
Grid-1 voltage
0 V
ClassA1
Grid-3 voltage
0 V
ClassA1
Cathode bias resistor
230 ohm
ClassA1
Plate current
5.5 mA
ClassA1
Grid-1 transconductance
3200 µS
ClassA1
Screen current
4.1 mA
ClassA1