PC033

Small directly heated transmitting pentode designed for RF Class-B/C amplification and modulated service. Its compact power construction supports transmitter output stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 4 V / 130 mA

Description

Small directly heated transmitting pentode for RF Class B/C amplifier and modulated 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: 4 V
Nominal heater current: 130 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: 0.0014 S
Max plate voltage: 300 V
Max screen voltage: 125 V
Max plate dissipation: 3 W
Max screen dissipation: 1.5 W
Max cathode current: 25 mA

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

Other

Maximum plate voltage
300 V
Maximum screen voltage
125 V
Maximum plate dissipation
3 W
Maximum screen dissipation
1.5 W
Maximum cathode current
25 mA
Operating plate voltage
300 V
ClassC;Telegraphy
Operating screen voltage
125 V
ClassC;Telegraphy
Operating plate current
25 mA
ClassC;Telegraphy
RF output power
3.5 W
ClassC;Telegraphy
Efficiency
66 %
ClassC;Telegraphy

Characteristics

Transconductance
1400 uS
Screen-grid amplification factor
3.3

Capacitance

Plate-cathode capacitance
11 pF
Grid-cathode capacitance
10 pF
Plate-grid capacitance
0.12 pF