EF2

Philips RF pentode with documented heater data, ratings, characteristics, operating conditions, and capacitances. The source establishes high-frequency signal-amplifier service while also publishing specialized secondary-emission quantities.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

RF pentode. The supplied Philips source was read for heater data, ratings, characteristics, operating conditions, and capacitances; special secondary-emission quantities are retained as parameters where standard section fields do not apply.

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: 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

Plate resistance: 1400000 Ω
Transconductance: 0.0028 S
Max plate voltage: 250 V
Max screen voltage: 200 V
Max plate dissipation: 1.5 W
Max screen dissipation: 0.3 W
Max cathode current: 8 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

Characteristics

Heater voltage
6.3 V
Heater current
200 mA
Typical plate voltage
250 V
Typical grid 2 voltage
100 V
Typical plate current
4.5 mA
Transconductance
2800 uS

Other

Maximum no-current plate voltage
400 V
Maximum plate voltage
250 V
Maximum plate dissipation
1.5 W