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EC55

Power-capable triode intended for amplifier or driver service. Manufacturer data support moderate-current operation and useful dissipation, but do not justify assignment to the large transmitting or specialized regulator families.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 400 mA

Description

EC55 is listed in the supplied Amperex material as a disc-seal microwave triode for amplifier and oscillator service. Published operating conditions and electrical characteristics were captured from the supplied tables.

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: 400 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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.006 S
Amplification factor: 30
Max plate voltage: 350 V
Max plate dissipation: 10 W
Max cathode current: 40 mA

Published ratings and characteristics promoted from the approved source.

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

1953 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
400 mA
Nominal
Maximum Plate Voltage
350 V
Maximum Plate Dissipation
10 W

Characteristic

Transconductance
5600 µS
Typical
Amplification Factor
3
Typical

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
400 mA
Published heater rating
Amplification factor
30
MicrowaveTriode
Transconductance
6000 µS
MicrowaveTriode
Gain
8 dB
At 4000 MHz
Bandwidth
50-0.1 dB MHz
At 4000 MHz

Other

Maximum plate dissipation
10 W
MicrowaveTriode
Plate voltage
250 V
MicrowaveTriode
Plate current
20 mA
MicrowaveTriode
Power output
2.8 W
At 1000 MHz
Power output
0.5 W
At 3000 MHz
Power output
1.8 W
At 4000 MHz

Data set 03

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
250 V
Grid voltage
-3.5 V
Plate current
20 mA
Maximum plate voltage
350 V
Maximum useful frequency
3000 MHz

Characteristic

Transconductance
6000 uS
Amplification factor
30

Capacitance

Plate capacitance
0.03 pF
Grid capacitance
1.6 pF
Grid-plate capacitance
- to 1.3 pF

Data set 04

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
400 mA
Published heater rating
Transconductance
6000 µS
MicrowaveTriode
Amplification factor
30
MicrowaveTriode

Other

Plate voltage
250 V
MicrowaveTriode
Grid bias
-3.5 V
MicrowaveTriode
Plate current
20 mA
MicrowaveTriode

Capacitance

Plate capacitance
0.03 pF
Published
Grid capacitance
1.8 pF
Published

Data set 05

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Typical anode voltage
250 V
Typical anode current
20 mA
Maximum anode current
40 mA