CR176

Forced-air-cooled high-power tetrode designed for HF power-amplifier service. Its transmitting construction supports substantial professional radio-frequency output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5 V / 64 A

Description

Forced-air-cooled high-power tetrode for HF power-amplifier service.

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: 5 V
Nominal heater current: 64 A
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

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.044 S
Max plate voltage: 7500 V
Max screen voltage: 1500 V
Max plate dissipation: 35000 W
Max screen dissipation: 200 W
Max grid dissipation: 25 W
Max cathode current: 10 A

Applicable promoted ratings mapped semantically from the printed approximate-data/ratings tables; useful non-promoted operating, capacitance and service data retained in TUBE_SECTION_PARAMETER.

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Filament Starting Current Maximum
160 A
Frequency Full Rating Maximum
30 MHz
Input Capacitance
40 pF
Output Capacitance
14 pF
Grid1-Anode Capacitance
0.4 pF
Typical Plate Voltage
3000 V
Typical Screen Voltage
1500 V
Typical RF Output Power
25000 W