PAW1215

Water-cooled Philips transmitting pentode designed for high-power RF amplifier and final-stage service. Its liquid-cooled construction supports substantially greater dissipation in professional transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 220 V / 80 A

Description

Water-cooled transmitting pentode for high-power RF amplifier and final-stage service. The supplied Philips source was read for heater/filament data, ratings, characteristics, RF/television operating conditions, and capacitances where published.

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: 220 V
Nominal heater current: 80 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

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.008 S
Amplification factor: 4
Max plate voltage: 12000 V
Max screen voltage: 2000 V
Max plate dissipation: 12000 W
Max screen dissipation: 1500 W
Max cathode current: 11 A

High-power transmitting pentode; maximum ratings and representative RF characteristic promoted.

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Typical plate voltage
12000 V
Typical screen and suppressor voltage
1500 V
Typical plate current
1 A
Transconductance
8000 uS
Screen-grid amplification factor
4
Maximum tested plate dissipation
15 kW

Capacitance

Plate-cathode capacitance
30.5 pF
Grid-cathode capacitance
31 pF
Plate-grid capacitance
0.12 pF

Other

Class C RF output power
21 kW
ClassC;Telegraphy;Wavelength>=150m
Class C efficiency
63.5 %
ClassC;Telegraphy;Wavelength>=150m