PL175A

400 W beam pentode using a vane-type suppressor grid for low-distortion linear RF and audio amplification, suitable for transmitting, linear-amplifier, and modulator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: GIANT5
Base pins: 5
Nominal heater: 5 V / 14.5 A

Description

The Penta PL175A is a 400 w beam pentode using a vane-type suppressor grid for linear rf and audio amplification.

Socket description

Giant 5-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: GIANT5
Base pins: 5
Nominal heater voltage: 5 V
Nominal heater current: 14.5 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

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.004 S
Amplification factor: 4.5
Max plate voltage: 4000 V
Max screen voltage: 750 V
Max plate dissipation: 400 W
Max grid dissipation: 10 W

Highest reliable published rating promoted; additional values and operating/application details retained as parameter rows.

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

1965 Penta Labs Power Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

Heater/filament voltage
5 V
Heater/filament current
14.5 A
Amplification factor
4.5
Transconductance
4000 uS

Other

Maximum plate voltage
4000 V
Maximum screen voltage
750 V
Maximum plate dissipation
400 W
Maximum control-grid dissipation
10 W
Source language
English

Capacitance

Grid-plate capacitance
0.06 pF
Input capacitance
15.1 pF
Output capacitance
9.8 pF

Application

Primary application
400 W beam pentode using a vane-type suppressor grid for linear RF and audio amplification.
Replacement family
4-400A

Construction

Cooling
Radiation/convection or source-specific
Electrode structure
Pentode