Alternatives & variations Download PDF datasheet

Voltage Radio Detector Converter ·Diode-Pentode

EAF41

Diode-pentode for receiver RF/IF amplification and detection. The high-resistance pentode provides useful high-frequency gain while the separate diode supplies signal-detection and rectification service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: RIMLOCK
Socket code: RIMLOCK8
Base pins: 8
Nominal heater: 6.3 V / 200 mA

Description

Diode-pentode with variable transconductance for RF, IF, and AF amplifier service.

Socket description

Rimlock 8-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: RIMLOCK
Socket code: RIMLOCK8
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

RIMLOCK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 1200000 Ω
Transconductance: 0.0018 S
Amplification factor: 19
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2 W
Max screen dissipation: 0.3 W
Max cathode current: 10 mA

Promoted from clearly identified published ratings/characteristics; additional operating points, capacitances, detector data, microwave data, and special-quality limits are retained in TUBE_SECTION_PARAMETER.

Section 2

Diode

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 350 V
Rectifier nominal output current: 600 mA
Rectifier peak forward current: 5 A

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

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
250 V
RFIFAmplifier
Screen voltage
85 V
RFIFAmplifier
Control-grid voltage
-2 V
RFIFAmplifier
Plate current
5 mA
RFIFAmplifier
Screen current
1.6 mA
RFIFAmplifier

Characteristic

Transconductance
1800 µS
Section1
Plate resistance
1200000 Ω
Section1

Capacitance

Plate capacitance
6.5 pF
Section1
Grid capacitance
4 pF
Section1
Grid-to-plate capacitance maximum
0.002 pF
Section1

SECTION 2

Diode

Capacitance

Diode capacitance
3.8 pF
Section2

Other

Peak inverse voltage maximum
350 V
DetectorDiode
Average diode current maximum
0.6 mA
DetectorDiode
Peak diode current maximum
5 mA
DetectorDiode

Data set 02

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
RFOrIF
Typical plate current
5 mA
RFOrIF
Typical screen current
1.6 mA
RFOrIF
Transconductance
1600 uS
RFOrIF
Plate resistance
1.2 Mohm
RFOrIF

Other

Maximum plate no-current voltage
550 V
Maximum plate voltage
300 V
Maximum plate dissipation
2 W
Maximum screen no-current voltage
550 V
Maximum screen dissipation
0.3 W

Capacitance

Plate capacitance
6.5 pF
Grid input capacitance
4 pF
Plate-grid capacitance maximum
0.002 pF
Grid-heater capacitance maximum
0.05 pF

SECTION 2

Diode

Other

Maximum diode inverse peak voltage
350 V
Maximum diode average current
0.8 mA
Maximum diode peak current
5 mA